GHK-Cu is also described in scientific literature as naturally occurring in biological environments
each R 4 is independently selected from F, Br, I, CN, NO 2 , OR 9 , OCF 3 , NR 8 R 9 , C(O)NR 8 R 9 , N(R 8 )C(O)R 10 , N(R 8 )CO 2 R 10 , NHS(O) 2 R 10 , S(O) 2 NR 8 R 9 , C 2 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 1 -C 6 heteroalkyl, C 2 -C 7 heterocycloalkyl, C 6 -C 10 aryl, and C 3 -C 9 heteroaryl
Kaufman KD, Olsen EA, Whiting D, et al
When GCs receive FSH signals, they produce inhibin, which inhibits FSH secretion and promotes the development of dominant and atresia non-dominant follicles (41)
Zinc deficiency in the cortical marginal zone and meninges results in cortical lamination defects resembling those in type II lissencephaly