is 4.5 mg ghk cu too much GHK-Cu Peptides Before and After: Dosage, Benefits & How It Works for Skin and Hair GHK-CU aka the beauty peptide.

ERK1/2 Activation Extracellular signal-regulated kinases 1 and 2 trigger transcription factors c-Fos and c-Jun when activated by BPC-157

In skincare, this translates into the use of nicotinamide (niacinamide) a clinically proven NAD+ precursor

Parkinsons disease-linked mutations in VPS35 induce dopaminergic neurodegeneration

But whats getting the spotlight right now are more than a dozen unapproved peptide drugs that, back in September 2023, the FDA added to its Category 2 Bulk Substances listthats a list of substances that the FDA says pose significant safety risks and are not eligible for compounding without further research