1% Vitamin C ●
TL;DR. This ingredient is used as a water-soluble antioxidant active, mainly to support tone-evening claims and help protect the formula and skin surface from oxidation-related stress. At 1%, it is a low-dose active rather than a high-strength treatment level.
What does 1% Vitamin C do in a cosmetic formula?
This ingredient is used as a water-soluble antioxidant active, mainly to support tone-evening claims and help protect the formula and skin surface from oxidation-related stress. At 1%, it is a low-dose active rather than a high-strength treatment level.
Is 1% Vitamin C clean?
From a clean-beauty perspective, this ingredient is generally well accepted and not a common restricted-list concern. The main formulation caveat is comfort, since low-pH systems can feel tingly or irritating on sensitive skin.
Is 1% Vitamin C sustainable?
This material is commonly produced from plant-derived carbohydrate feedstocks through fermentation and chemical conversion. It is water-soluble and readily biodegradable, with low persistence concerns in rinse-off or leave-on use levels.
Is 1% Vitamin C COSMOS-approved?
It is generally compatible with COSMOS natural and organic formulas when the raw material, processing route, and supporting ingredients meet the standard. Its Green Chemistry profile is strongest when sourced from renewable feedstocks, made with efficient processing, and stabilized without heavy solvent systems.
How does 1% Vitamin C work chemically?
The molecule is a small six-carbon lactone with an enediol structure, which explains both its reducing antioxidant behavior and its sensitivity to oxidation. At 1%, stability depends heavily on water content, pH, oxygen, heat, light, and metal ions, so chelators, air-limited processing, and opaque packaging are commonly used.
Last updated 2026-05-13