At Real Peptides, every compound we synthesize, from GHK-CU Cosmetic to complex research molecules, is a lyophilized (freeze-dried) powder
Their identity, strength, and quality may be uncertain
UV exposure also breaks tretinoin down
Vitamin B (pyridoxine), when chronically taken in gram quantities, is known to cause a sensory neuropathy, numbness and tingling in the extremities, but the amount of B in this formula (2 mg per mL) is far below such neurotoxic levels
( Wiley Online Library ) Where the evidence is still a bit thin Topical anti-wrinkle outcomes: a 2025 review on topical GHK as an anti-wrinkle peptide points out practical limitations (like stability and penetration) and highlights that clinical studies are surprisingly limited compared to how widely its promoted