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Combining GHK-Cu with other peptides Many researchers use GHK-Cu alongside other peptides
doi: 10.1016/s0378-8741(01)00217-3 278 TomodaM.GondaR.KasaharaY.HikinoH
Direct sunlight accelerates degradation
The best practice is to use Vitamin C serums in the morning and GHK-Cu and/or retinoids in the evening, allowing several minutes between product applications
Dietary Supplements Guidance Documents & Regulatory Information 2024 [Available from: EFSA Panel on Nutrition NF, Allergens F, Turck D, Bohn T, Castenmiller J, De Henauw S, et al
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