10.1089/acm.2006.12.881 Summary Keywords vitamin B12, efficacy, bioavailability, therapeutic approaches, meta-analysis, cobalamin Citation Mazur M, Ndokaj A, Salerno C, Vallone J, Ardan R, Bietolini S, Carrouel F, Wilk A, Sarig R, Ottolenghi L and Bourgeois D (2025) Efficacy of sublingual and oral vitamin B12 versus intramuscular administration: insights from a systematic review and meta-analysis
No major professional medical organization recommends the peptide for any indication
"Enhancement by PL-14736 of collagen synthesis in healing wounds." J Physiol Paris
I like this paper
Again, evidence is primarily animal-based, not FDA approved
Impaired follicle functioning: B12 helps to metabolise proteins and other nutrients that are key for healthy hair follicles and continuous hair growth