ghk-cu safety “Is actually worth it?” is genuinely one of the most common questions in my comments, so let me finally answer it properly., The short version: copper peptides have real research behind them, GHK-Cu Peptides Before and After:

Cost: Lower than acute protocols, $100-$250 monthly for maintenance peptide use

During long-term treatment, some patients may need chest X-rays, or ophthalmic exams to assess any potential side effects

Moreover, you are more likely to be deficient in this vitamin if you take certain medications, like: Metformin PPIs Histamine H2 blockers Oral contraceptives Chronic alcoholism can also damage your digestive system to the point that it can no longer sufficiently absorb vitamin B12

Others exist in a gray area as research chemicals

Butyrate inhibits inflammatory responses through NFkappaB inhibition: implications for Crohns disease