FOXO4-DRI's selectivity claims are from cell and animal models
Testosterone and muscle protein metabolism

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[25] Aller R, Izaola O, Gmez S, et al
Selenium, a key element in spermatogenesis and male fertility
For quantification purposes, the absorption coefficient for 2,4-DNPH (22,000 M 1 cm 1 ) was employed 36