Though allergies to cobalt are rarely dangerous, taking any form of B12 supplement, whether by injection, tablet, or topically applied gel, may result in an uncomfortable, itchy rash
GHRP-2 does retain a legitimate clinical niche
Kyono, K., Hashimoto, T., Nagai, Y
Life Sci 2001
One early study reported that GHK-Biotin: Increased the anagen/telogen ratio, indicating a higher percentage of follicles in the active growth phase Upregulated Ki-67, a marker of cell proliferation in cultured hair folliclesan early signal of increased follicular activity that may support stronger regrowth over time Resulted in visibly improved hair density and increased follicular activity in men with alopecia when applied topically at 10 ppm for four months (Active Peptide Company, 2014) These effects suggest that GHK-Biotin may help anchor hair at the root, strengthen keratin synthesis, and support regrowth, particularly when paired with other regenerative peptides
extrapolation to the TB-500 fragment alone remains incomplete in the published literature