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Articles

Does Dietary Protein in Early Life Affect the Development of Adiposity in Mammals?

Deutsches Institut für Ernährungsforschung, D-14558, Bergholz-Rehbrücke, Germany

¹To whom correspondence should be addressed. E-mail: metges{at}www.dife.de

This article examines the proposition that dietary protein in pre- and early postnatal life influences the development of adiposity in later life. In rodents, low protein intake during gestation can result in low birth weight and subsequently leads to various metabolic disturbances in adulthood, such as high blood pressure, impaired glucose tolerance and insulin resistance. The few controlled studies conducted in animals suggest that high protein or energy intake during gestation leads to low birth weights. Observational studies in humans have been inconclusive in establishing a relationship between dietary protein intake in pregnancy and effects on birth weight and adiposity of the offspring later in life. There is only weak epidemiological evidence linking high protein intake during early childhood and the development of obesity. By contrast, studies in domestic animals have found that higher levels of protein intake are often associated with lower rates of fat accretion. Additional studies are proposed to explore claims linking protein nutrition in early life to the postnatal development of obesity and disease in humans.

KEY WORDS: • fetal programming • amino acid homeostasis • breast-feeding • growth velocity

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