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Always talk to a doctor before starting supplements, even if you think you need more
Vegans are also at risk since B12 is only found in animal products
Verify purity and sterility low-quality or contaminated peptides can cause adverse reactions or ineffective results
GHK-Cu splits by form: topical versions are legally sold as a cosmetic ingredient, while injectable GHK-Cu is unapproved and sold under research labeling only
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