This is a Beyond Beauty product which means it has been sourced, tried and tested and finally declared one of the most new and innovative heroes out there. Zelens'travel-sized Power C Collagen-Boosting&Brightening is a high-potency concentrate with 20% highly stable vitamin C ester. Enriched with a proprietary complex of fermented botanicals rich in vitamin C, this silky collagen-boosting and brightening treatment promotes skin's firmness and elasticity, reduces the appearance of fine lines and wrinkles and evens skin tone to reveal a visibly radiant and youthful complexion. Dermatologist tested. Suitable for all skin types.