| http://www.w3.org/ns/prov#value | - Scientists later developed safer vitamin A derivatives (notably retinoic acid); now sold as prescription drugs, these include the acne and antiwrinkle cream Retin-A. Lower doses of vitamin A (25,000 IU a day) can be used to treat a range of skin conditions, including acne, dry skin, eczema, rosacea, and psoriasis.
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