glutathione benefits skin whitening for lightening: a regnant myth or evidence-based verity? WHITENING Glutathione Effective Skin Brightening

Contraindications include personal history of medullary thyroid cancer or MEN2 syndrome

I have many patients who use both oral forms with B12 shots and injections

Research overwhelmingly describes the safety of GHK-Cu positively, such as when the authors of a 2018 review called it a safe, inexpensive, extensively studied compound.14 However, even though copper peptides have demonstrated an impressive safety track record in studies, there are (as with most skin care actives) a few safety risks to consider

Rotate between different sites and different areas within each site to prevent injection site reactions and tissue changes