5-HT is known to modulate the secretion of gonadotropin-releasing hormone (GnRH) on the HPA axis, resulting in a direct effect of 5-HT on testosterone levels (39)
In lab and clinical research, its been observed to activate fibroblasts (the cells that produce collagen), increase glycosaminoglycan synthesis (which helps skin retain water), modulate matrix metalloproteinases (MMPs, the enzymes that break down old tissue), and act as a copper cofactor in antioxidant pathways
Peptides are not recommended for individuals with certain medical conditions, pregnant or breastfeeding women
H., Jacobson, K
T., Mackay, K., Leabeater, A., Clarke, A., Schofield, K., & Driller, M
[18] Endogenous vitamin B 12 becomes inactive when exposed to hydrogen cyanide and nitric oxide in cigarette smoke