The short answer: it depends but a reasonable expectation is: At 4 weeks : subtle internal changes and gentle lightening At 8 weeks : more visible brightening and evenness At 12 weeks : notable improvements in tone, radiance, and pigmentation Keep in mind that studies show positive changes in glutathione levels and skin brightness over 412 weeks
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But duration still matters especially if you're recovering from injury or using it to address chronic conditions like gut inflammation
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