Multivitamin/Multimineral Supplementation Prevents or Reverses Decline in Vitamin Biomarkers and Cellular Energy Metabolism in Healthy Older Men: A Randomized, Double-Blind, Placebo-Controlled Study. - Michels AJ; Butler JA; Uesugi SL; Lee K; Frei BB; Bobe G; Magnusson KR; Hagen TM (Nutrients, 2023)