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Can GHK-Cu be used alongside Retin-A or Vitamin C serums

Among studies on topical glutathione, a 0.5% concentration showed significantly greater reduction in pigmentation than both 0.1% and placebo

The same 2017 study referenced above reported the following side effects in some participants who received 250mg of oral glutathione:6 Pruritis (itching) Macular erythema (rash-like red patches on the skin) Red spots on the skin Tiredness Transaminitis (high liver enzyme levels in the blood) Additionally, specific glutathione supplements may pose more safety concerns than others

of Employees: 1744 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 83371 No

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