Where more evidence is needed Without independent replication of Sikiris results, it will remain difficult to convince the broader medical field that this compound is a true therapeutic option
Van Biesen, W., Lameire, N., Vanholder, R
The consequence of this solution is a much better stability in gastric juice, better biological activity, because the intact compound is present in the body for a longer period, thanks to which its absorption is significantly improved
free testosterone measures the unbound fraction
If youre looking into B12 support, the options can get confusing fast
Compatible with: Hyaluronic acid (for hydration) Niacinamide (for barrier support and tone) Growth factors Peptides (like Matrixyl or Argireline) Use with caution: Vitamin C (especially L-ascorbic acid) may destabilize copper peptides if mixed directly Retinoids can cause irritation when layered with GHK-Cu unless used at separate times (e.g., retinoid at night, GHK-Cu in the morning) AHAs and BHAs can lower skin pH and potentially reduce the effectiveness of copper peptides Spacing out these ingredients or consulting with a provider for a personalized routine can maximize benefits and avoid conflicts