Role of Dietary Protein Intake in Elderly Adults

Inclusion Criteria: * Men and women, ages \> 60 years Exclusion Criteria: * History of diabetes * History of malignancy in the 6 months prior to enrollment * History of gastrointestinal bypass surgery (Lapband, etc) * History of a chronic inflammatory condition or disease (Lupus, HIV/AIDS, etc) * Pregnant females * Subjects who do not or will not eat animal proteins * Subjects who cannot refrain from consuming protein or amino acid supplements during their participation in this study * Subjects who report regular resistance exercise (more than once per week) * Hemoglobin less than 9.5 mg/dL at the screening visit * Platelets less than 150,000 at the screening visit * Subjects who are not willing or able to suspend aspirin for several days prior to their muscle biopsies * Subjects who have been prescribed a blood-thinning medication (Coumadin, lovenox, heparin, Plavix, etc.) * Concomitant use of corticosteroids (ingestion, injection or transdermal) * Any other disease or condition that would place the subject at increased risk of harm if they were to participate, at the discretion of the study physician