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Conclusion: While copper peptide showed enhanced results in the early weeks, there was no significant difference between the groups in regard to treatment response in later weeks

This is especially great for athletes wanting an edge over the other competitors

While findings suggest diverse biological activities, these remain under investigation and are not confirmed for practical applications

Without adequate copper availability at the follicular level, newly synthesized collagen structures remain weak and fail to provide the structural support necessary for robust hair growth

That transporter is L-Carnitine

A 2022 double-blind, benchmark- and placebo-controlled RCT by Duperray, Sergheraert, and colleagues in the Journal of Cosmetic Dermatology (n=124 Asian women, 12 weeks) found that oral L-cystine plus reduced L-glutathione significantly lightened skin and reduced facial dark spot size at both 6 and 12 weeks versus placebo