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Unfortunately, Retinol as a chemical ingredient is subject to degradation5 if it is not stored correctly or in appropriate containers. It can also cause skin irritation, particularly if it is used incorrectly.
At my clinic, we sell a number of professional skincare products containing Retinol which have been carefully designed and developed by dermatological experts to promote cellular efficiency and regeneration, revitalise ageing and compromised skin, increase collagen production and improve skin tone and elasticity.
Make sure you ask a cosmetic medical expert about what’s best for your skin.
1 http://www.prevention.com/beauty/skin-care/best-anti-aging-product-retinoids-vitamin 2 http://www.webmd.boots.com/vitamins-and-minerals/vitamin-a3 Katzev, P.K., Katzev Phillip K, 1991. Retinol skin care composition. U.S. Patent 5,002,760.4 http://www.allure.com/gallery/biggest-retinol-cream-myths5 Liu, J.C., Wang, J.C., Yusuf, M., Yamamoto, N. and Kazama, S., Johnson & Johnson Consumer Products, Inc., 2000. Skin care composition comprising a retinoid. U.S. Patent 6,080,393.