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Category 3: Bulk Drug Substances lacking sufficient documentation or evidence for the FDA to evaluate them and cannot be compounded as active ingredients

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Table of Contents Key Takeaways: GHK-Cu is a naturally occurring copper peptide found in human plasma, saliva, and urine

Copper toxicity concerns are generally minimal with topical applications due to limited systemic absorption

Wound areas were quantified using ImageJ software, and all measurements were normalized to the scale bar