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vitamin c skin care

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3 Reasons Your Skin Needs Vitamin C | Kiehl's

Why does your skin need Vitamin C? This powerful antioxidant in our NEW Powerful-Strength Line-Reducing Concentrate is a multi-benefit ingredient that can help boost radiance, smooth lines, and provide protection. SHOP Powerful-Strength Line-Reducing Concentrate: • Vitamin C helps boost skin…

Formulating with Vitamin C

Vitamin C is a highly effective material – as long as it doesn’t degrade in the formula! Learn how to formulate with vitamin C for best long term stability, and which materials have the best stability even in adverse conditions.…