Sodium benzoate is a preservative used in soft drinks, foods, shampoos, skincare, lotions, and many other items. The problem comes you eat/drink anything with ascorbic acid (Vitamin C), you are creating Benzene. Benzene causes cancer. There are way too many carcinogens (causes cancer) in our environment, foods, and practically everything, it is important to understand that we have many chemical processes in our bodies. Some reaction are not caused by one agent, but are created with secondary and tertiary, or more, agents. Why does formulation matter? Over the counter are just bunch of ingredients put together and sold to the masses. They tend to consist of filler ingredients and very little actives. Cosmeceuticals are held to strict FDA guidelines and standards. It requires a real chemist to evaluate all ingredients and formulation. Please stop putting just any junk on or in your body.