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February 2017 in “ACS biomaterials science & engineering” Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.
53 citations,
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January 2023 in “EFSA journal” Adults should not consume more than 255 micrograms of selenium per day to avoid risk of hair loss and other side effects.
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June 2023 in “Journal of trace elements in medicine and biology” Eating too much selenium can cause bad breath, hair loss, and nail changes, with harmful effects starting at low daily doses.
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