ghk-cu collagen stimulation Bio Mystery Copper Peptide Face Serum for Anti Aging & Skin Repair | 5% GHK-Cu Peptides + 1% Hyaluronic Acid | Hydrates & Supports Production Walked into @perfectbmed for my

Zinc supplements compete with copper absorption and may affect GHK-Cu efficacy if taken at the same time

Once you open a vial of sterile water, it has zero defense against microbial contamination

Bernards, High-throughput functional genetic and compound screens identify targets for Senescence induction in Cancer

The US Anti-Doping Authority says there is a concerning lack of published clinical trial data because studies appear to have been cancelled or stopped without any published conclusions

Its not FDA-approved, and selling it as a drug or supplement in the US isnt legal (source)

But it is not strictly necessary