High Concentration Vitamin C Serum and Sun Sensitivity

Using high concentration Vitamin C serum, particularly L-Ascorbic Acid at 15-20%, does not inherently make your skin thin. However, it is a potent active ingredient that can increase skin cell turnover and exfoliate the skin, which can lead to temporary sensitivity, redness, or mild peeling, especially when you first start using it or if your skin is sensitive.

While Vitamin C is a powerful antioxidant that helps protect your skin from free radical damage caused by sun exposure, it does not replace the need for sunscreen. In fact, because high concentration Vitamin C can make your skin temporarily more prone to sensitivity, it is crucial to use a broad-spectrum sunscreen with SPF 30 or higher daily when using these serums. This will protect your skin from UV damage and allow you to get the full benefits of the Vitamin C.

To minimize potential sensitivity, you can start with a lower concentration of Vitamin C and gradually increase as your skin builds tolerance. Always perform a patch test before applying a new product to your entire face.

Products like Vitamin C (L-ascorbic acid) in various grades (Fine, Ultra-Fine, Standard) can be used to formulate serums, or you can use ready-made options such as the 16% Vitamin C Brightening Serum or Vitamin C E Ferulic serum.