Opinion on the role of protein in promoting athletic performance is divided along the lines of
how much aerobic-based versus resistance-based activity the athlete undertakes. Athletes …

Plant protein foods contribute≈ 65% of the per capita supply of protein on a worldwide basis
and≈ 32% in the North American region. These sources of protein are discussed in relation …

Phenylketonuria (PKU) is caused by deficient activity of the enzyme phenylalanine
hydroxylase, needed to convert the essential amino acid (AA) phenylalanine (phe) to …

A higher protein intake has been recommended for endurance athletes compared with
healthy non-exercising individuals based primarily on nitrogen balance methodology. The …

The aims of this introductory article are to survey and critically evaluate the concepts and
approaches that have been used to assess amino acid adequacy and to hypothesize about …

Background: Vitamin D deficiency is associated with obesity; whether repletion supports
weight loss and changes obesity-related biomarkers is unknown. Objective: We compared …

The same basic principles are used to deliver dietary treatment in PKU that was developed
sixty years ago. Dietary treatment is undoubtedly very successful, but it has gradually …

▪ Abstract A full review of the strengths and limitations of the various methods used to define
amino acid requirements is provided. The focus is on the recent development of carbon …

Background: The current estimated protein requirements are based on the nitrogen balance
method, which has many limitations. An alternate approach is needed to permit a …

Background: Studies on protein requirements in vulnerable groups such as older adults are
few, and results are conflicting. Objective: The main objective of this study was to determine …