1. From the Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, MA (KLT and NQ); the Department of Clinical Nutrition, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan (KM); the Hebrew Rehabilitation Center for Aged Research and Training Institute, Harvard Medical School, Boston, MA (MTH and DPK); a