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Cysteine: the key precursor to glutathione Glutathione synthesis depends on the availability of cysteine, a sulphur-containing amino acid
The skin parameters were measured by corneometer (hydration), tewameter (TEWL), an Antera 3D system (wrinkles), and elasticity (cutometer) at baseline and day 42 and day 84 in the treatment groups ( n = 36 treatment
The clinical trials available do suggest a skin-lightening effect, but the long-term safety and efficacy of high doses have not been extensively studied
Most people find that starting with 200-400 mcg per day is a good range, but its always best to get advice from a healthcare professional based on your specific needs
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