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Be cautious of very inexpensive products that claim to contain GHK-Cu: the synthesis of this peptide is costly, and an abnormally low price may indicate underdosing
Don't leave peptides in hot cars or direct sunlight
(2016) Glutathione depletion, pentose phosphate pathway activation, and hemolysis in erythrocytes protecting cancer cells from vitamin C-induced oxidative stress, J
Once opened, refrigeration helps maintain stability
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