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.
Do not take VALIUM for a longer time than your doctor has prescribed. VALIUM should be taken for short periods only (for example 2 to 4 weeks) unless advised by your doctor. Do not stop taking VALIUM or lower the dose without first checking with your doctor.
RDA of Selenium. The Institute of Medicine's Food and Nutrition Board advises that adults and adolescents over age 13 need 55 micrograms of selenium each day. Children up to 13 years old need less -- between 20 and 40 micrograms daily, depending on age and weight. Pregnant and lactating women need more. During pregnancy, a woman should aim to consume 60 micrograms of selenium each day. When she is nursing, she needs about 70 micrograms.