1. From the Carotenoids & Health Laboratory, USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA (GT, GED, and RMR); the Hunan Province Center for Disease Control and Prevention, Changsha, China (YH); Maternal & Child Nutrition, National Institute for Nutrition and Food Safety, Beijing, China (SY); the Zhejiang Academy of Medical Sciences, Hangzhou, China (YW); the USDA-ARS