There are two different types of vitamin A. The first type, preformed vitamin A, is found in meat, poultry, fish, and dairy products. The second type, provitamin A, is found in fruits, vegetables, and other plant-based products.The most common type of provitamin A in foods and dietary supplements is beta-carotene.here are two different types of vitamin A. The first type, preformed vitamin A, is found in meat, poultry, fish, and dairy products. The second type, provitamin A, is found in fruits, vegetables, and other plant-based products.
Your doctor will tell you how many VALIUM tablets to take each day. The dose varies from person to person depending on age and the condition being treated. The usual adult dose is between 5 and 40 mg daily. Children, elderly and very ill patients may need to take less.
Government guidelines recommend 55 micrograms (mcg) of selenium per day, but for optimal health and disease prevention, up that to 200 mcg per day. And we believe it's best to get this mineral from food, not supplements. Too much selenium can be toxic, so don't overdo it -- keep your daily intake below 400 mcg.