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A Category 1 designation means there is sufficient evidence to support safe compounding not that the compound is FDA-approved as a drug

Cosmetic-grade GHK-Cu generally has lower purity specifications, often acceptable for topical applications but unsuitable for precise scientific studies

It is advisable to run appropriate controls (vehicle, doseresponse) to exclude non-specific effects in in vitro systems

Individual variation Perhaps the most important lesson from real-world experiences is the extent of individual variation

To create this list of 10 supplements, I reviewed more than 30 different products and consulted other experts in the field to consider their expertise and top picks

[DOI] [PubMed] [Google Scholar] 159.Newsholme P