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We also observed that although the total daily PUFA dosage that exhibited beneficial effects was in the range of 0.7 2 g EPA and 0.4 0.8 g DHA daily, with an administration period of three weeks to four months, positive vitamin D-based supplementation effects were observed after administering doses of 2000 IU/day or 50,000 IU/week between 8 weeks and 24 months

Additionally, skin whitening using a melanin index also significantly improved at 4, 8, or 12 weeks of treatment

10.1016/j.ejphar.2020.173473 149 ShimadaK.SkoutaR.KaplanA.YangW

Clin Invest Med 35(6):E370E377 Langston W, Circu ML, Aw TY (2008) Insulin stimulation of gamma-glutamylcysteine ligase catalytic subunit expression increases endothelial GSH during oxidative stress: influence of low glucose

[DOI] [PubMed] [Google Scholar] 121.Garnier L., Simon-Plas F., Thuleau P., Agnel J.P., Blein J.P., Ranjeva R., Montillet J.L

One community member summarized it well: GHK-Cu may help hair through tissue repair, anti-inflammatory signaling, and angiogenesis, but men shouldn't expect it to move hormone labs