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In the U.S., zinc deficiency is unusual, as most people receive sufficient zinc from foods as varied as meat, fish, fortified cereals, beans, eggs, nuts, and dairy products
Alt Text: GHK-Cu peptide regulatory context map showing cosmetic, compounding, injectable safety, and approved drug label distinctions
it is, at best, a mechanistically reasonable adjunct whose independent contribution has not been quantified in controlled human trials
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