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For GHK-CU and AHK-CU, start with 1-2% concentration regardless of which type you choose
Smoking, excessive alcohol consumption, chronic stress, and processed food diets all rapidly deplete glutathione levels
If you freeze it at -20C, you can get 24-36 months
Copper toxicity is a theoretical concern given that GHK-Cu chelates copper ions
Nutritional deficiencies, stress, and hormonal changes unrelated to the peptide can all affect hair
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