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Why Keratin is Good for Hair Growth Treatment: Replenishes damaged hair: Keratin treatments help restore lost keratin in the hair shaft caused by damage from heat styling, chemical treatments, or environmental factors
The treatment groups outperformed placebo by 5.5 (Group A) to 7.4 (Group B), providing clear evidence that the improvement was caused by the active ingredients, not the placebo effect
Graber JJ, Sherman FT, Kaufmann H, Kolodny EH, Sathe S
Editorial selection Why glutathione supplementation is complicated For years, the conventional view in the research community was that oral glutathione supplementation was a waste of money
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