None of the 8 actives in The One formula have been linked to increased photosensitivity. For example, one of the great advantages of Sytenol A (our pure bakuchiol extract) compared to retinol is that it does not cause photosensitivity in the skin. Sytenol A is a 99% pure bakuchiol extract and, unlike many other generic bakuchiol products on the market (e.g., Babchi Oil serums), it does not contain phototoxic phytocompounds. If you want to be sure that your product contains the only true, clinically tested, non-photosensitizing retinol-alternative, check the product’s official ingredient (INCI) list. If your product is made using Sytenol A, it will read 'bakuchiol'. Stay clear of  'Babchi Extract', 'Psoralea Corylifolia Extract', and 'Bakuchi Oil'. The One also contains vitamin C combined with vitamin E, which together act as an antioxidant and photoprotective power couple. They neutralize free radicals forming on skin surface and, in this way, protect against UV-induced oxidative damage. Remember, even if your skincare product is not photosensitizing, it does not mean that you can skip your daily SPF. Wearing sunscreen daily is the easiest and most effective way to prevent premature skin aging and reduce the risk of skin cancer.