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It cannot be injected into the body alone
Sulfur occurs in several amino acids, two of which methionine and cysteine are precursors for glutathione and therefore According to a 2017 study, mushrooms are among the most significant dietary sources of glutathione and ergothioneine, the latter of which is a sulfur amino acid
For storage duration: reconstituted GHK-Cu lasts 21-28 days refrigerated with bacteriostatic water, shorter than most peptides due to copper oxidation concerns
Dweik, Suzy A.A
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