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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
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10.1038/s41416-019-0660-x 55
Consult a GP if youre considering L-carnitine.5 Take home message Its been suggested that L-carnitine has the ability to move more fatty acids into your cells to be burnt for energy, making it an effective performance enhancer, and it may also be beneficial for fat burning and weight loss
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