Machens A, Lorenz K, Weber F, et al
Hirose T, Shimizu K, Ogura H, Tasaki O, Hamasaki T, Yamano S, et al
For example, riboflavin has been shown to be involved in the conversion of tryptophan to niacin (vitamin B3) 57 , which stimulates the production of collagen (type I, III, and V), elastin and fibrillin (1 and 2), butto the best of our knowledgethis has only been substantiated ex vivo in dermal fibroblasts 58
Rhodes, S
[8] With that framing set, the sections below compare the two on structure, mechanism, regulatory status, human evidence, safety, and the single most important caveat of all: no published trial has ever compared them head-to-head
Medicine and Science in Sport and Exercise, 2107, Vol