Vitamin E: are you getting ''E''-nough? It is estimated that 75 percent of adult Americans are not meeting the 15 milligrams-per-day recommended daily allowance for Vitamin E.* While Vitamin E is considered the most effective fat-soluble antioxidant, it has also been shown to help promote metabolic functioning to fight against free radicals and oxidative stress.* Another benefit of Vitamin E is its support of circulatory health.*