Vitamin E can be a confusing topic. How much should I use? Does it cause rancidity? What is the alpha tocopherol version? Read on to answer some of these questions.
Fatty acids contained in oils are known to undergo autoxidation and eventually become rancid. First these acids form free radicals, the free radicals react with oxygen and produce peroxides, and the reaction terminates in what people recognize as rancid fat.
Vitamin E is not a preservative, it is an antioxidant. Therefore it is effective in preventing the oxidation process mentioned above.
Rancidity can also be caused by using too much Vitamin E. Levels of 0.2-0.8% mixed tocopherol (50%) is a good starting point. Anything over 1% should have accelerated stability testing to verify you won’t have shelf life issues. Monitor your product at 40C and see if it gains weight. If it does, that means your product is going rancid.
Vitamin E also has significant skin benefits, and for this reason we sometimes see high levels in topical formulations. Alpha tocopherol is preferred and has been shown to maintain skin health.
At Holland, we have a wide range of Vitamin E options to help meet your needs. Please call us when you need Vitamin E help!