Effects of protein quality on appetite and energy metabolism in normal weight subjects.
OBJECTIVE
The purpose of this study was to compare the effects of consumption of different protein sources on food intake and energy expenditure in normal weight subjects.


METHODS
Breakfast preparations (casein, soy protein, whey protein or control) were ingested during seven consecutive days. Appetite, food intake, and energy expenditure were assessed.


RESULTS
Casein consumption led to a lower energy intake than whey protein. There was lower energy intake on day 7 than on day 1 of the casein session. Soy protein preparations resulted in higher diet induced thermogenesis (DIT) than in control preparations. The respiratory quotient (RQ) obtained in the whey protein session was lower than the control and soy protein sessions.


CONCLUSIONS
These results suggest that the consumption of different protein types leads to distinct effects on satiety (casein), DIT (soy protein), and/or RQ (whey protein).
Alfenas
Rita de Cássia Gonçalves
Rde C
Departamento de Nutrição e Saúde, Universidade Federal de Viçosa, Viçosa, MG, Brasil. ralfenas@ufv.br
Bressan
Josefina
J
Paiva
Aline Cardoso de
AC
D000704:Analysis of Variance; D001066:Appetite / Q000187:drug effects*; D002364:Caseins / Q000494:pharmacology; D004044:Dietary Proteins / Q000145:classification / Q000494:pharmacology* / Q000592:standards; D004435:Eating / Q000187:drug effects*; D002149:Energy Intake / Q000187:drug effects*; D004734:Energy Metabolism / Q000187:drug effects*; D005260:Female; D006801:Humans; D008297:Male; D008894:Milk Proteins / Q000494:pharmacology; D009765:Obesity / Q000517:prevention & control; D010101:Oxygen Consumption / Q000187:drug effects; D012527:Satiation / Q000187:drug effects; D030262:Soybean Proteins / Q000494:pharmacology; D018709:Statistics, Nonparametric; D022722:Thermogenesis / Q000187:drug effects; D000067816:Whey Proteins; D055815:Young Adult
D002364:Caseins; D004044:Dietary Proteins; D008894:Milk Proteins; D030262:Soybean Proteins; D000067816:Whey Proteins