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Vitamin B12 (cobalamin) is essential for healthy nerve function, red blood cell production, and DNA synthesis

Moreover, GHK has been shown to be a quencher for hydroxyl and peroxyl radicals by ESR spectroscopy, with its ability to quench hydroxyl radicals much stronger than glutathione (GSH), making it a strong endogenous antioxidant [20]

Tingling or numbness: Mild paresthesia in the extremities, related to fluid shifts and usually resolving within days

In the research framing, the lever that matters is consistency and duration , not size a point the timeline and troubleshooting sections return to repeatedly