Fine 325 Mesh Topical Powder Ascorbic Acid Our formulations are updated from time to time as part of our commitment to innovation. As such, the ingredient list shown here may vary from the box of the product depending on time and region of purchase. Mix a small amount with other treatments in the palm of your hand and apply to face in the AM or the PM. Avoid contact with the eyes. A tingling sensation can be expected after application. Do not mix with formulations containing Niacinamide or EUK 134. If irritation occurs, cease use and consult a physician. Use only as directed on unbroken skin. Patch testing prior to use is advised. Refer to our in-depth guide to patch testing. Keep out of reach of children. Vitamin C is an effective antioxidant that brightens the skin tone and reduces the appearance of signs of aging. This formula offers a very fine L-Ascorbic Acid powder that visibly targets the appearance of uneven skin tone, dullness, and signs of aging and is formulated to be mixed with other treatments (except those containing Niacinamide or EUK 134). The format of this formula is a very fine, anhydrous, L-Ascorbic Acid powder and, as such, provides the most direct exposure of extremely high concentrations of Vitamin C topically. With such format, a very strong tingling but non-irritating sensation is expected during the first 1-2 weeks of use until the skin's tolerance to such high exposure is elevated. If topical Vitamin C is used as part of skincare, it should be applied at alternate times with EUK 134 or Niacinamide (ideally Vitamin C in the PM and EUK 134/Niacinamide in the AM). Otherwise, EUK 134/Niacinamide can affect the integrity of pure-form Vitamin C (L-Ascorbic Acid). Topical Vitamin C offers a wide array of benefits to the skin. However, many forms of Vitamin C and many more formulations of Vitamin C are available commercially with a potential to confuse the audience. We have developed a guide that offers guidance on the formulations of Vitamin C offered under The Ordinary range. It also offers education on Vitamin C itself and on the differences between formulations of Vitamin C at large. Please click here for this guide.