展开Shop for Makeup online at Macys.com. a.m. topical vitamin c powder. turbo booster c powder is a 99.8% high potency topical vitamin c powder that helps prevent premature aging by acting as an antioxidant, and promoting collagen synthesis, which helps improve the skin's overall tone and texture. science has proven that the daily application of topical vitamin c will help retard the aging process, by neutralizing the effects of environmental attack. mix with any of your favorite products to instantly convert them into a state-of-the-art vitamin c formula.