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Li R, Jia Z, Trush MA
The effects of dietary supplement with collagen and vitamin C and their combination with hyaluronic acid on skin density, texture and other parameters: a randomized, double-blind, placebo-controlled trial
10.1038/379069a0 70 VallofD.KalafateliA
Lucas, answers may lie in the fact that the peptide is activating melanocytes and potentially darkening moles (a major point of concern in dermatology)
Unclear long-term safety: There is limited data on chronic use or systemic effects
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