115 research outputs found
Carbohydrate craving in obese people: Suppression by treatments affecting serotoninergic transmission
We examined the existence of carbohydrate cravings, and the effects on such cravings of treatments that enhance serotonin release, among 24 obese subjects who claimed to have excessive appetites for carbohydrates. Subjects living in a college dormitory for four weeks were given three fixed meals daily and allowed to choose at will among five proteinârich or five carbohydrateârich isocaloric snack foods, provided via a vending machine. For two weeks, they received no treatment (study 1) or a placebo (study 2); for the next two weeks, they received placebo, dâ1 fenfluramine or 1âtryptophan. All but one of the subjects exhibited a marked preference for carbohydrateârich over proteinârich snacks during the first two weeks of the study. The average daily intake of carbohydrateârich snacks was 4.1 ± 0.4 and of proteinârich snacks 0.8 ± 0.3. Seventeen of the subjects failed to consume any protein snacks on most days during the baseline or test periods, thus it was not possible for us to examine the effect of test treatments on protein snack intake. Fenfluramine administration significantly reduced carbohydrate snacking in six of nine test subjects, as well as in the group as a whole (2.4 ± 0.6 snacks/day vs 4.2 ± 0.6 during the twoâweek baseline period). Tryptophan significantly diminished carbohydrate intake in three of the eight treated subjects, and increased it in one subject; it did not significantly modify snacking patterns in the group as a whole. Placebo administration did not affect carbohydrate intake in any of the seven test subjects. These observations show that some obese people do consume carbohydrateârich snacks frequently and preferentially, and that this behavior can sometimes be diminished by treatments thought to enhance serotonin's release (fenfluramine) or synthesis (tryptophan)
Effect of a medical food on body mass index and activities of daily living in patients with Alzheimer's disease: secondary analyses from a randomized, controlled trial
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97852.pdf (publisher's version ) (Closed access)OBJECTIVES: To investigate the effect of a medical food (Souvenaid) on body mass index (BMI) and functional abilities in patients with mild Alzheimer's disease (AD). DESIGN/SETTING/PARTICIPANTS/INTERVENTION /MEASUREMENTS: These analyses were performed on data from a 12-week, double-blind, randomized, controlled, multicenter, proof-of-concept study with a similarly designed and exploratory 12-week extension period. Patients with mild AD (Mini-Mental State Examination score of 20-26) were randomized to receive either the active product or an iso-caloric control product. While primary outcomes included measures of cognition, the 23-item Alzheimer's Disease Cooperative Study-Activities of Daily Living (ADCS-ADL) scale was included as a secondary outcome. Both ADCS-ADL and BMI were assessed at baseline and Weeks 6, 12 and 24. Data were analyzed using a repeated-measures mixed model. RESULTS: Overall, data suggested an increased BMI in the active versus the control group at Week 24 (ITT: p = 0.07; PP: p = 0.03), but no treatment effect on ADCS-ADL was observed. However, baseline BMI was found to be a significant treatment effect modifier (ITT: p = 0.04; PP: p = 0.05), and an increase in ADCS-ADL was observed at Week 12 in patients with a 'low' baseline BMI (ITT: p = 0.02; PP: p = 0.04). CONCLUSIONS: These data indicate that baseline BMI significantly impacts the effect of Souvenaid on functional abilities. In addition, there was a suggestion that Souvenaid increased BMI
Melatonin excretion of man and rats: Effect of time of day, sleep, pinealectomy and food consumption
Choline Content of Mothers' Milk in Ecuador and Boston
To the Editor: We have found that the free choline concentration of human milk varies during postnatal development and is sometimes markedly depressed in samples from women thought to be ingesting a choline-deficient diet. Choline is a precursor in the biosyntheses of phospholipids1 and of the neurotransmitter acetylcholine.2,3 In animals, ingestion of a diet deficient in choline results in hepatic, renal, growth, and memory disorders.4 Neonates must ingest choline-containing foods like milk in order to maintain blood choline concentrations at high levels5; these levels may be needed to supply adequate choline to rapidly growing tissues
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