\ \ \ Vitamin C ●
TL;DR. This ingredient functions primarily as an antioxidant and skin-conditioning active, helping support brighter-looking tone and protect formulas and skin from oxidation-related changes.
What does \ \ \ Vitamin C do in a cosmetic formula?
This ingredient functions primarily as an antioxidant and skin-conditioning active, helping support brighter-looking tone and protect formulas and skin from oxidation-related changes.
Is \ \ \ Vitamin C clean?
This ingredient is broadly accepted in clean-beauty frameworks and has no major restricted-list friction. Very acidic, high-strength formulas can feel stinging on sensitive skin, so tolerance depends strongly on concentration and final pH.
Is \ \ \ Vitamin C sustainable?
This material is commonly made by fermentation or bioconversion of carbohydrate feedstocks, often from corn or other plant-derived sugars. It is water-soluble and readily biodegradable, with low persistence concerns in rinse-off or leave-on use.
Is \ \ \ Vitamin C COSMOS-approved?
It is generally permitted under COSMOS-natural and COSMOS-organic standards when it meets allowed sourcing and processing requirements. Its renewable feedstock potential, biodegradability, and low environmental persistence fit well with Green Chemistry principles, though industrial production can involve multi-step processing.
How does \ \ \ Vitamin C work chemically?
The molecule is a small, water-soluble enediol lactone that acts as a reducing antioxidant by donating electrons. In leave-on skin care it is often used around 5% to 20%, performs best at acidic pH near 2.5 to 3.5, and is sensitive to oxygen, light, heat, and metal ions, so airless packaging, chelators, and complementary antioxidants improve stability.
Last updated 2026-05-13