Who can use SkinPro 3% Retinol Complex Serum? SkinPro 3% Retinol Complex Serum is for people looking for the best retinol face serum with maximum-concentration, medical-grade ingredients that is still gentle on the skin. How long does SkinPro 3% Retinol Complex Serum take to work? Please be reminded that skin types vary from person to person. Users saw a noticeable difference in skin condition from the very first use. Many users continue the use of the product for up to 6 months or longer to maximize results. Does SkinPro 3% Retinol Complex Serum have any side effects? SkinPro 3% Retinol Complex Serum has no reported side effects. However, we advise speaking with a dermatologist before applying this product, and to test very small amounts of the product to gauge your skin’s reaction Will SkinPro 3% Retinol Complex Serum work on all skin types? Despite its maximum-strength retinol concentration, SkinPro 3% Retinol Complex Serum is suitable to use for all skin types – including normal, dry, and even sensitive – as well as all skin tones – including fair, medium, and deep. Can SkinPro 3% Retinol Complex Serum be used in conjunction with other SkinPro skincare products? Yes! Our SkinPro 3% Retinol Complex Serum can also be paired with other SkinPro products that suit your needs.