renew vitamina c review

Vitamin C is a popular ingredient in skincare products due to its antioxidant and anti-inflammatory properties. It is available in various forms such as L-ascorbic acid, ascorbyl-6-palmitate, or magnesium ascorbyl phosphate. The most effective form is L-ascorbic acid, which is the most biologically active form. Vitamin C serums with concentrations below 8% are ineffective, while those above 20% are less effective. The ideal concentration level is between 10 and 20%. The addition of other ingredients such as vitamin E and ferulic acid helps stabilize vitamin C and offers a stronger antioxidant action. Vitamin C products should be packaged in airtight bottles or opaque protective aluminum tubes to preserve their stability. Vitamin C is mostly safe to use, but in rare instances, side effects may occur, like stinging, redness, dryness, or a yellowish discoloration. It is recommended to try a patch test first before a full application. Some popular vitamin C serums include Mad Hippie Vitamin C Serum, Beauty Shield Vitamin C Pollution Prevention Serum by e.l.f, and Paula's Choice C15 Super Booster.