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![Efficacy of an Oral Supplement on Dark Spot Pigmentation in Healthy Caucasian Subjects: a Randomized Double Blind, Placebo-Controlled Clinical Study[v1] | Preprints.org Efficacy of an Oral Supplement on Dark Spot Pigmentation in Healthy Caucasian Subjects: a Randomized Double Blind, Placebo-Controlled Clinical Study[v1] | Preprints.org](https://www.preprints.org/frontend/picture/ms_xml/manuscript/b110c2bb56ba2ea747ec10961b2b4880/preprints-144336-g003.png)


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