@skincarewithcynthia: By far the best Retinol and Retinal serums 🌿 Ingredient highlights: @SKIN1004 US Retinol serum is very potent it contains hydrolyzed spicules that deeply penetrate the layers of the skin. Results time: two to three weeks Skin Sensitivity: Mildly irritation 🌟 Brand comparisons: @KSECRET GLOBAL Retinal liposome 2%serum with black ginseng very gentle formula contains black ginseng , left my skin feeling soft and moisturized Results time:three to four weeks Skin Sensitivity: mild irritation. Both serums are very effective depending on your skin concerns. I'm currently using the Lab in nature Retinol serum from Skin1004 I have run out of the Ksecret Retinal serum. Remember with Retinol/Retinal serums a little goes a long way they're best used in your night skin routine and please wear sunscreen the next morning 🌄