Vitamin B12 benefits hair health by supporting healthy blood cell production, which carries vital nutrients to hair follicles
Selank, on the other hand, is primarily studied as an anxiolytic peptide
What We Do Not Know We lack peer reviewed data defining systemic exposure thresholds, tissue distribution, immunogenicity rates, potential peptide related impurities impact, chronic dosing safety, interaction with existing pathologic angiogenesis (e.g
The peptide has also demonstrated interactions with the dopaminergic and serotonergic systems, with studies showing that BPC-157 can modulate the effects of dopamine-related agents in animal models and counteract some behavioural and neurochemical consequences of both dopamine agonists and antagonists (Sikiric et al., 2010)
Some foundational work is available primarily in Russian-language sources or in journals with limited international reach, complicating independent scrutiny and formal meta-analysis