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Muscle tissue changes with aging.
Volpi E, Nazemi R, Fujita S. Volpi E, et al. Curr Opin Clin Nutr Metab Care. 2004 Jul;7(4):405-10. doi: 10.1097/01.mco.0000134362.76653.b2. Curr Opin Clin Nutr Metab Care. 2004. PMID: 15192443 Free PMC article. Review.
Amino acid ingestion improves muscle protein synthesis in the young and elderly.
Paddon-Jones D, Sheffield-Moore M, Zhang XJ, Volpi E, Wolf SE, Aarsland A, Ferrando AA, Wolfe RR. Paddon-Jones D, et al. Am J Physiol Endocrinol Metab. 2004 Mar;286(3):E321-8. doi: 10.1152/ajpendo.00368.2003. Epub 2003 Oct 28. Am J Physiol Endocrinol Metab. 2004. PMID: 14583440 Free article. Clinical Trial.