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ADHD: Some studies suggest that L-Carnitine supplementation may improve symptoms of attention deficit hyperactivity disorder (ADHD) in children
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Last reviewed: May 14, 2026 Last updated: May 14, 2026 Written by: Jay Hastings , CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations
Skin Penetration and Depot Formation An ex vivo human skin penetration study measured a permeability coefficient of 2.43 x 10^-4 cm/h for copper tripeptide, with 82 micrograms per square centimeter retained in dermal tissue as a depot over 48 hours (PMID 20703511)
doi: 10.1093/humupd/dmw045 14 XuYLpezM
But this is what makes them so great in biology
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