glutathione vitamin c liquid numbuzin No.5+ Concentrated Face Serum - Travel Size 25% Vitamin C + Glutathione

Cosmetic Grade Water Soluble Suitable for Serums & Creams Ideal for DIY Skincare Formulations Important Before You Start GHK-Cu is generally best suited for: Water-based serums Hyaluronic-acid serums Water-based creams Gel moisturisers Lightweight lotions Avoid Combining With: Strong Vitamin C (L-Ascorbic Acid) Glycolic Acid AHAs / BHAs Strong exfoliating acids Oil-only formulations Highly acidic formulations may destabilise the copper-peptide complex

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[DOI] [PubMed] [Google Scholar] Morelle W., Slomianny M

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