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After your skin has adjusted to the initial concentration without any adverse reactions, you can consider gradually moving to products with a higher concentration of GHK-Cu if you feel your skin can tolerate it
at 4mg per administration, roughly 20
People often feel fatigue and difficulty breathing with this condition
Zhang, X., Lv, F
CT Labs products are furnished for LABORATORY RESEARCH USE ONLY
Kim B, Feldman EL
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