Pagina 2 di 4 PrimaPrima 1234 UltimaUltima
Risultati da 16 a 30 di 50

Discussione: Metabolica, cheto e salute

  1. #16
    Data Registrazione
    Jun 2004
    Messaggi
    1,220

    Predefinito

    Citazione Originariamente Scritto da fabbamonte
    Ciao a tutti!
    Vorrei esprimere un mio dubbio riguardo alla dieta metabolica e alle diete chetogeniche in generale: come la mettiamo con la salute di reni e fegato?
    Cio' che accomuna la Metabolica e la Chetogenica o la Chetogenica ciclica é consumare una grande quantità di proteine e di grassi per sopperire alla carenza o assenza di carboidrati. Tuttavia é quasi scontato ricordare quanto sia pericoloso per le reni un eccesso di proteine e quanto sia impegnativo per il fegato un eccesso di grassi saturi.
    Io vorrei sapere da chi stà sperimentando queste diete o le ha già sperimentate come si sente a livello di fegato e di reni.
    ho fatto gli esami dopo 5 mesi di keto standard (senza ricarica di carbo)...5 mesi solo a grassi, proteine e poche verdurelle....ah e circa 8 uova medie intere al giorno....
    esami ematici perfetti....nn dico minchiate..colesterolo LDL basso, colesterolo HDL alto
    colesterolo totale nella norma
    glicemia a digiuno nella norma (anzi i valori indicavano un'aumentata sensibilità insulinica)...

  2. #17
    Data Registrazione
    Jun 2004
    Messaggi
    1,220

    Predefinito

    Citazione Originariamente Scritto da Whipper1980
    Ciao CT.... Ma allora nn torna Bodynet ???????
    si..si..tranquillo..avranno prob tecnici..
    chiuso OT

  3. #18
    Data Registrazione
    Jun 2004
    Messaggi
    54

    Predefinito

    CT, io NON ho mai trovato alcuno studio a riguardo e ne ho cercati per molto tempo.

    il problema è il lungo periodo (decine e decine di anni) che ovviamente non possono essere studiati... tuttavia evidenze anedottiche riportano al fatto che la dieta sia sicura su soggetti sani e con un alimentazione e uno stile di vita comunque corretta (escludiamo quindi il caso si soggetti obesi, fumatori e consumatori di grosse quantità d'alccol che non fanno regolare attività fisica).

    OT:
    riapriranno il condominio molto presto
    fine OT.

  4. #19
    Data Registrazione
    Feb 2006
    Messaggi
    139

    Predefinito

    perchè l'attenzione è cosi' focalizzata sui numeri 2,2 2 2,5 1,9 se siamo tutti diversi ma con lo stesso marchio possiamo mangiare per singolo pasto quote più omeno grandi e ciò vale anche per il totale di prote.
    Credo che ciò è cosi' vero come lo è il fatto che persone apparentemente sane in realtà soffrono di reni anche mangiando quote molto basse 0,8 (gente normale)
    le patologie renali non credo che derivino solo da difetti genetici, creo invece che il modo di usare i macronutrienti ed eliminare le sostanze di scarto derivi proprio da impostazioni genetiche.
    forse ho detto stupidagini se cosi' fosse sono pronto a cambiare il mio pensiero immediatamente se mi spiegate voi.
    nell'attesa ritengo che vi possono essere soggetti del genere
    80kg che necessita solo di 1,8g/kg
    80Kg con 2,0g/kg
    80kg con 2,3g/kg
    forse l'ultimo assimila male o semplicemente il suo corpo ne richiede di più!

  5. #20
    Data Registrazione
    May 2004
    Messaggi
    2,188

    Predefinito

    E' anche vero che uno può avere un tumore ai polmoni senza aver mai fumato... Ma se fumi...

  6. #21
    Data Registrazione
    Jun 2004
    Messaggi
    1,220

    Predefinito

    Citazione Originariamente Scritto da jcondor74
    perchè l'attenzione è cosi' focalizzata sui numeri 2,2 2 2,5 1,9 se siamo tutti diversi ma con lo stesso marchio possiamo mangiare per singolo pasto quote più omeno grandi e ciò vale anche per il totale di prote.
    Credo che ciò è cosi' vero come lo è il fatto che persone apparentemente sane in realtà soffrono di reni anche mangiando quote molto basse 0,8 (gente normale)
    le patologie renali non credo che derivino solo da difetti genetici, creo invece che il modo di usare i macronutrienti ed eliminare le sostanze di scarto derivi proprio da impostazioni genetiche.
    forse ho detto stupidagini se cosi' fosse sono pronto a cambiare il mio pensiero immediatamente se mi spiegate voi.
    nell'attesa ritengo che vi possono essere soggetti del genere
    80kg che necessita solo di 1,8g/kg
    80Kg con 2,0g/kg
    80kg con 2,3g/kg
    forse l'ultimo assimila male o semplicemente il suo corpo ne richiede di più!
    ...e quindi?...

  7. #22
    Data Registrazione
    Jun 2004
    Messaggi
    1,220

    Predefinito

    Citazione Originariamente Scritto da cos78
    CT, io NON ho mai trovato alcuno studio a riguardo e ne ho cercati per molto tempo.

    il problema è il lungo periodo (decine e decine di anni) che ovviamente non possono essere studiati... tuttavia evidenze anedottiche riportano al fatto che la dieta sia sicura su soggetti sani e con un alimentazione e uno stile di vita comunque corretta (escludiamo quindi il caso si soggetti obesi, fumatori e consumatori di grosse quantità d'alccol che non fanno regolare attività fisica).

    OT:
    riapriranno il condominio molto presto
    fine OT.
    ci siamo..gli studi riguardano mesi...

    Recentissime considerazioni su dieta iperproteica

    Sports Nutrition Review Journal. 1(1):45-51, 2004. (www.sportsnutritionsociety.org)
    Sports Nutrition Review Journal©. A National Library of Congress Indexed Journal. ISSN # 1550-2783
    HIGH-PROTEIN WEIGHT LOSS DIETS AND
    PURPORTED ADVERSE EFFECTS: WHERE IS THE
    EVIDENCE?
    Anssi H. Manninen
    Department of Physiology, Faculty of Medicine, University of Oulu, Finland. Sports Nutrition
    Review Journal. 1(1):45-51, 2004. Address correspondence to anssi.manninen@oulu.fi.
    Received March 1, 2004/Accepted May 9, 2004/Published (online):
    __________________________________________________ ______________________________
    ABSTRACT
    Results of several recent studies show that high-protein, low-carbohydrate weight loss diets indeed
    have their benefits. However, agencies such as the American Heart Association (AHA) have some
    concerns about possible health risks. The purpose of this review is to evaluate the scientific validity
    of AHA Nutrition Committee´s statement on dietary protein and weight reduction (St. Jeor ST et al.
    Circulation 2001;104:1869-1874), which states: “Individuals who follow these [high-protein] diets
    are risk for… potential cardiac, renal, bone, and liver abnormalities overall. Simply stated, there is
    no scientific evidence whatsoever that high-protein intake has adverse effects on liver function.
    Relative to renal function, there are no data in the scientific literature demonstrating that healthy
    kidneys are damaged by the increased demands of protein consumed in quantities 2-3 times above
    the Recommended Dietary Allowance (RDA). In contrast with the earlier hypothesis that highprotein
    intake promotes osteoporosis, some epidemiological studies found a positive association
    between protein intake and bone mineral density. Further, recent studies studies suggest, at least in
    the short term, that RDA for protein (0.8 g/kg) does not support normal calcium homeostasis.
    Finally, a negative correlation has been shown between protein intake and systolic and diastolic
    blood pressures in several epidemiological surveys. In conclusion, there is little if any scientific
    evidence supporting above mentioned statement. Certainly, such public warnings should be based
    on a thorough analysis of the scientific literature, not unsubstantiated fears and misrepresentations.
    For individuals with normal renal function, the risks are minimal and must be balanced against the
    real and established risk of continued obesity. Sports Nutrition Review Journal. 1(1):45-51, 2004
    Key Words: high-protein diets, adverse effects, American Heart Association
    __________________________________________________ ______________________________
    INTRODUCTION
    Certainly, living organisms thrive best in the
    milieu and on the diet to which they were
    evolutionarily adopted. From all indications,
    Homo sapiens sapiens (anatomically modern
    humans) has remained biologically
    unchanged during at least the last 50,000
    years.39 It was not until some 10,000 years
    ago that the transition from a roaming hunter
    and gatherer to a stationary farmer began.
    Consequently, our diet has become
    progressively more divergent from those of
    our ancient ancestors. The typical Paleolithic diet
    compared with the average modern American
    diet contained 3 to 4 times more protein.40
    It is implausible that an animal that adapted to a
    high protein diet for 5 million years suddenly in
    10,000 years becomes a predominant
    carbohydrate burner. Indeed, counter to the
    current U.S. Dietary Guidelines which promotes
    diet high in complex carbohydrates, recent
    clinical investigations support the efficacy of
    high-protein diets for weight loss/fat loss, as well
    as for improved insulin sensitivity and blood
    lipid profiles. Thus, the popularity of highprotein
    diets for weigh loss is unquestionable.
    However, there are always some concerns
    about high-protein diets.
    In 2001, the American Heart Association
    (AHA) Nutrition Committee published
    statement on dietary protein and weight
    reduction.2 According to this statement,
    “Individuals who follow these [high-protein]
    diets are risk for… potential cardiac, renal,
    bone, and liver abnormalities overall.
    However, it should be noted that there is little
    if any evidence supporting these contentions.
    Thus, this review deals with the relationship
    between protein intake and renal function,
    bone health, blood pressure, heart disease and
    liver function. Also, effects of very-low
    carbohydrate diet on lean body mass loss are
    discussed.

    PROTEIN INTAKE AND RENAL
    FUNCTION
    Healthy individuals. Despite its role in
    nitrogen excretion, there are presently no data
    in the scientific literature demonstrating the
    healthy kidney will be damaged by the
    increased demands of protein consumed in
    quantities above the Recommended Dietary
    Allowance (RDA). Furthermore, real world
    examples support this contention since kidney
    problems are nonexistent in the bodybuilding
    community in which high-protein intake has
    been the norm for over half a century.3
    Recently, Walser published comprehensive
    review on protein intake and renal function,
    which states: “it is clear that protein
    restriction does not prevent decline in renal
    function with age, and, in fact, is the major
    cause of that decline. A better way to prevent
    the decline would be to increase protein
    intake... there is no reason to restrict protein
    intake in healthy individuals in order to
    protect the kidney.” 4
    The study by Poortmans and Dellalieux
    investigated body-builders and other welltrained
    athletes with high- and mediumprotein
    intake, respectively.5 The athletes
    underwent a 7-day nutrition record analysis as
    well as blood sample and urine collection to
    determine the potential renal consequences of a
    high protein intake. The data revealed that
    despite higher plasma concentration of uric acid
    and calcium, bodybuilders had renal clearances
    of creatinine, urea, and albumin that were within
    the normal range. To conclude, it appears, at
    least in the short term, that protein intake under
    2.8 g/kg does not impair renal function in welltrained
    athletes.
    More recently, Knight et al. determined whether
    protein intake influences the rate of renal
    function change in women over an 11-year
    period.32 1624 women enrolled in the Nurses’
    Health Study who were 42 to 68 years of age in
    1989 and gave blood samples in 1989 and 2000.
    Ninety-eight percent of women were white, and
    1% were African American. In multivariate
    linear regression analyses, high protein intake
    was not significantly associated with change in
    estimated glomerular filtration rate (GFR) in
    women with normal renal function (defined as an
    estimated GFR 80 mL/min per 1.73 m2). Thus,
    the authors concluded that high protein intake
    does not seem to be associated with renal
    function decline in women with normal renal
    function. As pointed out by Lentine and
    Wrone33, the generalizability of these findings is
    limited by sampling characteristics to white midadulthood,
    but this limitation is overshadowed
    by strong internal validity grounded in a large
    sample size, prospective outcomes
    ascertainment, and adjustment for multiple
    covariates.
    Chronic Renal Failure. Historically, dietary
    protein restriction has been recommend as a
    therapeutic approach for delaying the
    progression of chronic renal failure (CRF).
    However, as pointed out by Ikizler,6 it is
    important to reassess the applicability of this
    approach. Indeed, the results of the largest
    randomised clinical trial, The Modification of
    Diet in Renal Disease (MDRD), did not
    demonstrate a benefit of dietary protein
    restriction on progression of renal disease.7
    Further, CRF patients have been shown to
    require a protein intake of 1.4 g/kg/day to
    maintain a positive or neutral nitrogen
    balance during nondialysis days, and even this
    intake may not be adequate for dialysis days.6
    Diabetics. According to American Diabetes
    Association (ADA), there is no evidence to
    suggest that usual protein intake (15-20% of
    total calories) should be modified if renal
    function is normal.8 The long-term effects of
    consuming > 20% of energy as protein on the
    development of nephropathy has not been
    determined, and therefore ADA nutritionists
    felt it may be prudent to avoid protein intakes
    > 20% of total daily energy.8 More recently,
    the metabolic effects of a high-protein diet
    were compared with those of the prototypical
    healthy (control) diet, which is currently
    recommended to persons with type 2
    diabetes.31 The ratio of protein to
    carbohydrate to fat was 30:40:30 in the highprotein
    diet and 15:55:30 in the control diet.
    The high-protein diet resulted in a 40%
    decrease in the mean 24-h integrated glucose
    area response. Further, glycated hemoglobin
    decreased 0.8% and 0.3% after 5 weeks of the
    high-protein and control diets, respectively.
    Finally, fasting triacylglycerol was
    significantly lower after the high-protein diet
    than after the control diet. The authors
    concluded that a high-protein diet lowers
    blood glucose postprandially in persons with
    type 2 diabetes and improves overall glucose
    control. Cleary, longer-term studies are
    necessary to determine the total magnitude of
    response and possible adverse effects.

    PROTEIN INTAKE AND BONE
    HEALTH
    Increasing dietary protein increases urine
    calcium excretion such that for each 50 g
    increment of protein consumed, and extra 60
    mg of urinary calcium is excreted. It follows
    that the higher the protein intake, the more
    urine calcium is lost and the more negative
    calcium balance becomes. Since 99% of the
    body´s calcium is found in bone, one would
    hypothesize that high protein induced
    hypercalciuria would results in high bone
    resorption and increased prevalence of
    osteopenia or osteoporotic-related fractures.
    However, the epidemiological and clinical data
    addressing this hypothesis are controversial. In
    fact, some epidemiological studies found a
    positive association between protein intake and
    bone mineral density (BMD).9,37,38 Further, there
    is growing evidence that a low protein diet has a
    detrimental effect on bone. For example,
    Kerstetter et al. reported that in healthy young
    women, acute intakes of a low-protein diet (0.7 g
    protein/kg) decreased urinary calcium excretion
    with accompanied secondary
    hyperparathyroidism.10 The etiology of the
    secondary hyperparathyroidism is due, in part, to
    a significant reduction in intestinal calcium
    absorption during a low protein diet.
    In a recent short-term intervention trial,
    Kerstetter et al. evaluated the effects of graded
    levels of dietary protein (0.7, 0.8, 0.9, and 1.0 g
    protein/kg) on calcium homeostasis.11 Secondary
    hyperparathyroidism developed by day 4 of the
    0.7 and 0.8 g protein/kg diets (due to the
    decreased intestinal calcium absorption), but not
    during the 0.9 or 1.0 g protein/kg diets in eight
    young women. There were no significant
    differences in mean urinary calcium excretion
    over the relatively narrow range of dietary
    protein intakes studied, although the mean value
    with the 0.7-g/kg intake was lower than that with
    the 1.0 g/kg intake by 0.25 mmol (10 mg).
    According to authors of this study, the lack of
    change may be due to the small sample and the
    inherent variability in urinary calcium excretion.
    Similarly, when Giannini et al. restricted dietary
    protein to 0.8 g protein/kg, they observed an
    acute rise in serum parathyroid hormone (PTH)
    in 18 middle-aged hypercalciuric adults.12 Taken
    together, both of studies suggest, at least in the
    short term, that the RDA for protein (0.8 g/kg)
    does not support normal calcium homeostasis.
    Furthermore, dietary protein increases
    circulating IGF-1, a growth factor that is thought
    to play an important role in bone formation.
    Indeed, several studies have examined the
    impact of protein supplementation in patients
    with recent hip fractures. For example, Schurch
    et al. reported that supplementation with 20 g
    protein/day for 6 months increased blood
    IGF-levels and reduced the rate of bone loss
    in the contralateral hip during the year after
    the fracture.28 More recently, the Cochranereview
    assessed the effects of nutritional
    interventions in elderly people recovering
    from hip fracture.41 Seventeen randomised
    trials involving 1266 participants were
    included. According to reviewers, the
    strongest evidence for the effectiveness of
    nutritional supplementation exists for oral
    protein and energy feeds, but the evidence is
    still weak.
    Moreover, many of these early studies that
    demonstrated the calciuric effects of protein
    were limited by low subject numbers,
    methodological errors and the use of high
    doses of purified forms of protein.35 Indeed,
    the recent study Dawson-Hughes et al. did not
    confirm the perception that increased dietary
    protein results in urinary calcium loss.36
    According to Dawson-Hughes et al., “The
    constellation of findings that meat
    supplements containing 55 g/d protein, when
    exchanged for carbohydrate did not
    significantly increase urinary calcium
    excretion and were associated with higher
    levels of serum IGF-I and lower levels of the
    bone resorption marker, N-telopeptide,
    together with a lack of significant correlation
    of urinary N-telopeptide with urinary calcium
    excretion in the high protein group (in
    contrast to the low protein) point to the
    possibility that higher meat intake may
    potentially improve bone mass in many older
    men and women.”
    Finally, the cross-cultural and population
    studies that showed a positive association
    between animal-protein intake and hip
    fracture risk did not consider other lifestyle or
    dietary factors that may protect or increase the
    risk of fracture.35 It is of some interest that the
    author of the most cited paper favoring the
    earlier hypothesis that high-protein intake
    promotes osteoporosis no longer believes that
    protein is harmful to bone.34 In fact, he
    concluded that the balance of the evidence seems
    to indicate the opposite.34

  8. #23
    Data Registrazione
    Jun 2004
    Messaggi
    1,220

    Predefinito

    PROTEIN INTAKE AND BLOOD
    PRESSURE
    The AHA Nutrition Committee suggests that
    high-protein intake may increase blood pressure.
    However, there is no scientific evidence
    supporting this contention. In fact, a negative
    correlation has been shown between protein
    intake and systolic and diastolic blood pressures
    in several epidemiological surveys analyzed by
    Obarzanek et al.13 For example,
    • Honolulu Heart Study. In this study of 6,406
    Japanese-American men, a negative
    relationship was observed between systolic
    and diastolic blood pressures and the amount
    protein consumed.14
    • Chinese Study. In this investigation of 2,672
    adults men and women, a negative
    relationship was found between systolic
    pressure and the amount of animal protein
    consumed.15
    • MRFIT Study. Based on 11,342 adult men,
    investigators observed a negative relationship
    between systolic blood pressure and the
    amount of total protein consumed.16
    In both normotensive and hypertensive rats,
    increasing the dietary protein level enhances
    both urine and the amount of sodium excreted,
    although the mechanism behind these effects is
    unknown and still speculative.17 Interestingly,
    one study in human volunteers with a family
    history of hypertension has shown that a highprotein
    diet may counteract the adverse effects of
    excessive salt intake.18 For more information on
    protein intake and blood pressure, see the recent
    review by Debry.17

    PROTEIN INTAKE AND HEART DISEASE
    Recent findings by Hu et al. suggests that
    replacing carbohydrates with protein may be
    associated with a lower risk of ischemic heart
    disease.25 This result is consistent with evidence
    from metabolic studies that replacement of
    dietary carbohydrate with protein has favorable
    effect on plasma lipoprotein and lipid
    concentrations. However, because an increase
    in protein intake from animal products such as
    meats, dairy products, and eggs is often
    accompanied by increases in intakes of
    saturated fat and cholesterol, dietary advice to
    improve public health based on these findings
    should be made with caution.25
    Recent novel approaches have shown that
    glucose and lipid intake may induce an
    increase in the generation of reactive oxygen
    species (ROS) and oxidative stress. For
    example, Mohanty et al. produced evidence
    that all three major macronutrients induce an
    increase in ROS generation.26 However, their
    data also show that different nutrients produce
    distinct patterns of stimulation of ROS
    generation after their intake. Of the three
    nutrients, glucose induced the greatest ROS
    generation, followed in decreasing order by
    fat (cream) and by protein (casein). The
    detriment of oxidative stress is that it may
    damage proteins and lipids, the latter through
    lipid peroxidation. Lipid peroxidation of
    LDL-C particles is an essential step in the
    development of atherosclerosis.27

    PROTEIN INTAKE AND LIVER
    FUNCTION
    AHA Nutrition Committee suggests that highprotein
    intake may have detrimental effects
    on liver function. However, there is no
    scientific evidence whatsoever supporting this
    contention. Protein is needed not only to
    promote liver tissue repair, but also to provide
    lipotropic agents such as methionine and
    choline for the conversion of fats to
    lipoprotein for removal from the liver, thus
    preventing fatty infiltration.20
    Rodents fed very high protein intakes have
    been found to exhibit morphological changes
    in the liver mitochondria, which could be
    pathological. However, Jorda et al. reported
    that the liver responds to the high-protein diet
    by a proliferation of normally functioning
    mitochondria.24 Further, the branched-chain
    amino acids to aromatic amino acids ratio was
    also increased, indicating the absence of hepatic
    failure in these animals. The authors concluded
    that “the increased protein content of diet
    induced rapid increases in several
    characteristics of hepatocytes… The results
    presented here constitute a good example of how
    the hepatocyte adapts to a continuing metabolic
    stress.”
    Further, protein catabolism is increased in liver
    disease and may be exacerbated by inadequate
    protein in the diet.19 Unless there is
    encephalopathy (vide infra), the diet should
    provide high-quality protein in the amount of 1.5
    to 2 g/kg.19 In alcoholic liver disease, a highcalorie,
    high-protein diet has been shown to
    improve hepatic function and reduce mortality.
    In one study, this was achieved by providing a
    regular diet plus supplements of 60 g/day of
    protein and 1600 kcal/day for the first 30 days
    and followed by supplements of 45 g/day of
    protein and 1200 kcal/day for the next 60 days.21
    Finally, the role of protein restriction in patients
    with chronic hepatic encephalopathy (HE) has
    been questioned recently as the efficacy of
    protein withdrawal in patients with HE has never
    been subjected to a controlled trial.29 According
    to Srivastava et al., “the emphasis in the
    nutritional management of patients with HE
    [hepatic encephalopathy] should not be on the
    reduction of protein intake. Instead, the goal
    should be to promote synthesis by making
    available ample amounts of amino acids, while
    instituting other measures to reverse the ongoing
    catabolism.”29

    EFFECTS OF VERY-LOWCARBOHYDRATE
    DIET ON LEAN BODY
    MASS
    According to the AHA Nutrition Committee,
    “Some popular high-protein/low-carbohydrate
    diets limit carbohydrates to 10 to 20 g/d, which
    is one fifth of the minimum 100 g/day that is
    necessary to prevent loss of lean muscle tissue.”
    Clearly, this is an incorrect statement since
    catabolism of lean body mass is reduced by
    ketones, which probably explains the
    preservation of lean tissue observed during
    very-low-carbohydrate diets.
    For example, Volek et al. examined the
    effects of 6-week carbohydrate-restricted diet
    on total and regional body composition and
    the relationships with fasting hormones.22
    Twelve healthy normal-weight men switched
    from their habitual diet (48% carbohydrate) to
    a carbohydrate-restricted diet (8%
    carbohydrate) for 6 weeks and 8 men served
    as controls, consuming their normal diet.
    Subjects were encouraged to consume
    adequate dietary energy to maintain body
    mass during intervention.
    Fat mass was significantly decreased (-3.4 kg)
    and lean body mass significantly increased
    (+1.1 kg) at week 6. However, there were no
    significant changes in composition in the
    control group. The Authors concluded that a
    carbohydrate-restricted diet resulted in a
    significant reduction in fat mass and a
    concomitant increase in lean body mass in
    normal-weight men. They hypothesized that
    elevated β-hydroxybutyrate concentrations
    may have played a minor role in preventing
    catabolism of lean tissue but other anabolic
    hormones were likely involved (e.g., growth
    hormone).
    Oddly, the AHA Nutrition Committee ignores
    the fact that energy restriction increases protein
    requirements. It has been know for about a half
    century that inadequate energy intake leads to
    increased protein needs, presumably because
    some of the protein normally used to synthesize
    both functional (enzymatic) and structural
    (tissue) protein is utilized for energy under these
    conditions.1 For example, Butterfield has shown
    that feeding as much as 2 g protein/kg/day to
    men running 5 or 10 miles per day at 65% to
    75% of their VO2max is insufficient to maintain
    nitrogen balance when energy intake is
    inadequate by as little as 100 kcal/day.30 Thus,
    when trying to lose weight, it is important to
    keep protein levels moderately high. The
    reduction in calories needed to lose weight
    should be at the expense of saturated fats and
    carbohydrates, not protein.

    CONCLUSION
    It is clear that the American Heart Association
    Nutrition Committee´s statement on dietary
    protein and weight reduction contains misleading
    and incorrect information. Certainly, such public
    warnings should be based on a thorough analysis
    of the scientific literature, not unsubstantiated
    fears and misrepresentations. For individuals
    with normal renal function, the risks are minimal
    and must be balanced against the real and
    established risk of continued obesity.23

  9. #24
    Data Registrazione
    Jun 2004
    Messaggi
    1,220

    Predefinito

    REFERENCES
    1. Manninen AH. Protein metabolism in exercising humans with special reference to protein supplementation. Department of
    Physiology, Faculty of Medicine, University of Kuopio, Finland, 2002, pp. 1-164.
    2. St. Jeor ST, Howard BV, Prewitt E et al. Dietary protein and weight reduction: A statement for health care professionals from
    the Nutrition Committee of the Council on Nutrition, Physical Activity, and Metabolism of the American Heart Association.
    Circulation 2001;104:1869-1874.
    3. Street C. High-protein intake – Is it safe? In: Antonio J, Stout JR, eds. Sports Supplements. Philadelphia: Lippincott Williams &
    Wilkins, 2001, pp. 311-312.
    4. Walser M. Effects of protein intake on renal function and on the development of renal disease. In: The Role of Protein and
    Amino Acids in Sustaining and Enhancing Performance. Committee on Military Nutrition Research, Institute of Medicine.
    Washington, DC: National Academies Press, 1999, pp. 137-154.
    5. Poortmans JR, Dellalieux O. Do regular high-protein diets have potential health risks on kidney function in athletes? Int J Sports
    Nutr 2000;10:28-38.
    6. Ikizler TA. Nutrition support and management of renal disorders. In: Bronner, F. ed. Nutritional Aspects and Clinical
    Management of Chronic Disorders and Diseases. Boca Raton, FL: CRC Press, 2003, pp. 156-175.
    7. Klahr S, Levey AS, Beck GJ et al. The effects of dietary protein restriction and blood-pressure control on the progression of
    chronic renal failure. N Engl J Med 1994;330:877-884.
    8. American Diabetic Association. Evidence-based nutrition principles and recommendations for the treatment and prevention of
    diabetes and related complications. Diabetes Care 2002;25:S50-S60.
    9. Cooper C, Atkinson EJ, Hensrud DD et al. Dietary protein intake and bone mass in women. Calcif Tissue Int 1996;58:320-325.
    10. Kerstetter JE, O´Brien KO, Insogna KL. Dietary protein affects intestinal calcium absorption. Am J Clin Nutr 1998;68:859-865.
    Sports Nutrition Review Journal. 1(1):45-51, 2004. (www.sportsnutritionsociety.org)
    51
    11. Kerstetter JE, Svastislee C, Caseria D et al. A threshold for low-protein-diet-induced elevations in parathyroid hormone. Am J
    Clin Nutr 2000;72:168-173.
    12. Giannini S, Nobile M, Sartori L et al. Acute effects of moderate dietary protein restriction in patients with idiopathic
    hypercalciuria and calcium nephrolithiasis. Am J Clin Nutr 1999;69:267-271.
    13. Obarzaneck E, Velletri PA, Cutler JA. Dietary protein and blood pressure. JAMA 1996;275:1598-1603.
    14. Reed D, McGee D, Yano K, Hankin J. Diet, blood pressure, and multicollinearity. Hypertension 1985;7:405-410.
    15. Zhou B, Wu X, Tao SQ. Dietary patterns in 10 groups and the relationship with blood pressure. Collaborative Study Group for
    Cardiovascular Diseases and their Risk Factors. Chin Med J 1989;102:257-261.
    16. Stamler JS, Caggiuala A, Grandist GA. Relationship of dietary variables to blood pressure (BP) findings of the Multiple Risk
    Factors Intervention Study (MRFIT). Circulation 1992;85:867, Abstract 23.
    17. Debry G. Data on hypertension. In: Dietary Proteins and Atherosclerosis. Boca Raton, FL: CRC Press, 2004, pp. 191-203.
    18. Kuchel O. Differential catecholamine responses to protein intake in healthy and hypertensive subjects. Am J Physiol
    1998;R1164-R1173.
    19. Navder KP, Lieber CS. Nutritional support in chronic disease of the gastrointestinal tract and the liver. In: Bronner, F. ed.
    Nutritional Aspects and Clinical Management of Chronic Disorders and Diseases. Boca Raton, FL: CRC Press, 2003, pp. 45-
    68.
    20. Navder KP, Lieber CS. Nutrition and alcoholism. In: Bronner, F. ed. Nutritional Aspects and Clinical Management of Chronic
    Disorders and Diseases. Boca Raton, FL: CRC Press, 2003, pp. 307-320.
    21. Mendellhall C, Moritz T, Roselle GA et al. A study of oral nutrition support with oxadrolone in malnourished patients with
    alcoholic hepatitis: results of a Department of Veterans Affairs Cooperative Study. Hepatology 1993;17:564-576.
    22. Volek JS, Sharman MJ, Love DM et al. Body composition and hormonal responses to a carbohydrate-restricted diet.
    Metabolism 2002;51:864-870.
    23. Feinman RD, Fine EJ. Thermodynamics and metabolic advantage of weight loss diets. Metab Synd Relat Disord 2003;1:209-
    219.
    24. Jorda A, Zaragosa R, Manuel P et al. Long-term high-protein diet induces biochemical and ultrastructural changes in rat liver
    mitochondria. Arch Biochem Biophys 1988;265:241-248.
    25. Hu FB, Stampfer MJ, Manson JA et al. Dietary protein and risk of ischemic heart disease in women. Am J Clin Nutr
    1999;70:221-227.
    26. Mohanty P, Ghanim H, Hamouda W et al. Both lipid and protein intake stimulates increased generation of reactive oxygen
    species by polymorphonuclear leukocytes and mononuclear cells. Am J Clin Nutr 2002;75:767-772.
    27. Aljada A, Mohanty P, Dandona P. Lipids, carbohydrates, and heart disease. Metab Synd Relat Disord 2003;1:185-188.
    28. Schurch MA, Rizzoli R, Slosman D et al. Protein supplements increase serum insulin-like growth factor-I levels and attenuate
    proximal femur bone loss in patients with recent hip fracture: A randomized, double-blind, placebo-controlled trial. Annals
    Internal Med 1998;128:801-809.
    29. Srivastava N, Singh N, Joshi YK. Nutrition in management of hepatic encephalopathy. Trop Gastoenterol 2003;24:59-62.
    30. Butterfield GE. Whole-body protein utilization in humans. Med Sci Sports Exer 1987;19:S167-S165.
    31. Gannon MC, Nuttall FQ, Saeed A et al. An increase in dietary protein improves the blood glucose response in persons with type
    2 diabetes. Am J Clin Nutr 2003;78:734-41.
    32. Knight EL, Stampfer MJ, Hankinson SE et al. The impact of protein intake on renal function decline in women with normal
    renal function or mild renal insufficiency. Ann Intern Med 2003;138:460-7.
    33. Lentine K, Wrone EM. New insights into protein intake and progression of renal disease. Curr Opin Nephrol Hypertens
    2004;13:333-336.
    34. Heaney RP. Protein intake and bone health: the influence of belief systems on the conduct of nutritional science. Am J Clin Nutr
    2001;73:5-6.
    35. Ginty F. Dietary protein and bone health. Proc Nutr Soc 2003;62:867-76.
    36. Dawson-Hughes B, Harris SS, Rasmussen H et al. Effect of dietary protein supplements on calcium excretion in healthy older
    men and women. J Clin Endocrinol Metab 2004;89:1169-73.
    37. Geinoz G, Rapin CH, Rizzoli R et al. Relationship between bone mineral density and dietary intakes in the elderly. Osteoporos
    Int 1993;3:242-8.
    38. Michaelsson K, Holmberg L, Mallmin H. Diet, bone mass, and osteocalcin: a cross-sectional study. Calcif Tissue Int
    1995;57:86-93.
    39. Åstrand P-O, Rodahl K, Dahl HA, Stromme SB. Our biological heritage. In: Textbook of Work Physiology. Champaign, IL:
    Human Kinetics, 2004, pp. 1-7.
    40. O´Keefe JH, Cordain L. Cardiovascular disease resulting from a diet and lifestyle at odds with our Paleolithic genome: How to
    become a 21st-century hunter-gatherer. Mayo Clin Proc 2004;79:101-108.
    41. Avenell A, Handoll H. Nutritional supplementation for hip fracture aftercare in the elderly. Cochrane Database Syst Rev
    2004;1:CD001880.


    poi ne ho altri...

  10. #25
    Data Registrazione
    Jul 2005
    Messaggi
    104

    Predefinito

    Ct dove posso trovare informazioni dettagliate su ckd e metabolica?link please

  11. #26
    Data Registrazione
    Jun 2004
    Messaggi
    54

    Predefinito

    ti conviene leggere libri!
    quelli di Duchaine, Di Pasquale, Mc Donald etc...

  12. #27
    Data Registrazione
    Jun 2004
    Messaggi
    1,220

    Predefinito

    Citazione Originariamente Scritto da hacksquat
    Ct dove posso trovare informazioni dettagliate su ckd e metabolica?link please
    "the ketogenic diet" by lyle mcdonald (mulo)
    "the ultimate diet 2.0" by lyle mcdonald (mulo)
    "the rapid fat loss handbook" by lyle mcdonal (mulo)
    "the flexible diet" by lyle mcdonald (mulo)
    "bromocriptine" (ottimo) by lyle mcdonald (mulo)
    "Underground bodyopus" by daniel duchaine (amazon.com)...fantastico, l'ho finito di leggere proprio oggi

    questi sono tutti in inglese...

    italiano trovi solo "la dieta metabolica" di di pasquale...ma nn è un granchè...

  13. #28
    Data Registrazione
    Jul 2005
    Messaggi
    12,012

    Predefinito

    Piccolo OT:

    ct-7b, hai la mailbox pm piena, potresti svuotarla ? Avrei bisogno di inviarti una piccola richiesta.

    Grassssie!

    Fine OT:

  14. #29
    Data Registrazione
    Jun 2004
    Messaggi
    1,220

    Predefinito

    Citazione Originariamente Scritto da tattoos
    Piccolo OT:

    ct-7b, hai la mailbox pm piena, potresti svuotarla ? Avrei bisogno di inviarti una piccola richiesta.

    Grassssie!

    Fine OT:
    open OT...

    l'ho svuotata ieri

    close OT....

  15. #30
    Data Registrazione
    Jun 2004
    Messaggi
    54

    Predefinito

    CT, di dipasquale c'è the anabolic Diet... migliaia di volte meglio della metabolic diet... almeno c'è un integrazione col BBing...

Discussioni Simili

  1. precisazione su max perdita fat in cheto/metabolica
    Di sir--kris nel forum Alimentazione & Nutrizione
    Risposte: 4
    Ultimo Messaggio: 07-07-2008, 05:19 PM
  2. Proteine salute e Allenamento
    Di arabafenice nel forum Integratori Alimentari
    Risposte: 149
    Ultimo Messaggio: 01-04-2008, 03:08 PM
  3. Salute e benessere
    Di Francy711 nel forum Alimentazione & Nutrizione
    Risposte: 2
    Ultimo Messaggio: 19-10-2005, 10:27 PM
  4. Proteine salute e Allenamento
    Di arabafenice nel forum Programmazione e Pianificazione dell'Allenamento
    Risposte: 140
    Ultimo Messaggio: 21-02-2004, 09:54 AM
  5. Fritto + vino = salute
    Di Cesarone nel forum Alimentazione & Nutrizione
    Risposte: 14
    Ultimo Messaggio: 30-04-2003, 02:04 PM

Permessi di Scrittura

  • Tu non puoi inviare nuove discussioni
  • Tu non puoi inviare risposte
  • Tu non puoi inviare allegati
  • Tu non puoi modificare i tuoi messaggi
  •  
Due parole . . .
Siamo nati nel 1999 sul Freeweb. Abbiamo avuto alti e bassi, ma come recita il motto No Pain, No Gain, ci siamo sempre rialzati. Abbiamo collaborato con quella che al tempo era superEva del gruppo Dada Spa con le nostre Guide al Bodybuilding e al Fitness, abbiamo avuto collaborazioni internazionali, ad esempio con la reginetta dell’Olympia Monica Brant, siamo stati uno dei primi forum italiani dedicati al bodybuilding , abbiamo inaugurato la fiera èFitness con gli amici Luigi Colbax e Vania Villa e molto altro . . . parafrasando un celebre motto . . . di ghisa sotto i ponti ne è passata! ma siamo ancora qui e ci resteremo per molto tempo ancora. Grazie per aver scelto BBHomePage.com
Unisciti a noi !
BBHomePage
Visita BBHomePage.com

Home