Skin Authority, LLC, Carlsbad, is the latest company to be issued a warning letter from the US Food and Drug Administration following a review of the firm’s website. In its review, undertaken last month, FDA contends Skin Authority’s  “Wrinkle Reversing Serum,” “Moisturizing Lift Cream,” “VitaD Fortified Topical Elixir,” “Reviving Eye Brightener,” “Coffee Almond Scrub,” and “Bamboo Ginseng Scrub,” appear to be promoted for uses that cause the products to be drugs under section 201(g)(1)(C) of th...