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Avoid combining it directly with vitamin C or highly acidic products, which may destabilize the peptide
The onboarding process was smooth and straightforward, and I was able to get my first order quickly without any issues
Journal of Cosmetic Dermatology, 22 (1), 262-266
Allies of Skin Copper Tripeptide & Ectoin Advanced Repair Serum pricing This serum is, by far, the most expensive option of our top picks, but Allies of Skin does offer one of the best subscription discounts among the products in this guide
Avoid simultaneous use with strong acids or chelators (e.g., vitamin C or retinol serums) because they can inactivate copper peptides
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