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Some studies show a skin-lightening benefit as well, due to direct and indirect inhibition of the tyrosinase enzyme and switching from eumelanin to phaeomelanin production
Clin Biochem
Research has also shown that astaxanthin can directly inhibit the activity of matrix metalloproteinases (MMPs) in human dermal fibroblasts, thereby protecting collagen from enzymatic degradation
Eight healthy men were given 1 gram per day of oral glutathione or a placebo for two weeks, followed by 60 minutes of cycling at 40% maximal heart rate
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