A Vitamin A, E and beta carotene blood profile can help patients determine the quality of their nutrition and maintain better over all health. All these vitamins are important anti-oxidants, substances that fight oxidation within the body. High levels of anti-oxidants can be used to prevent many degenerative diseases, such as stroke, neurological deterioration, coronary heart disease and some kinds of cancer. Anti-oxidants may also decrease the effects of aging, resulting in a better overall health and appearance. They can combat some of the damage done by exposure to pollutants, tobacco smoke and other toxic materials.

Having a vitamin A, E and beta carotene profile allows patients who are currently taking anti-oxidant supplements to assess the effectiveness of their program and adjust their diets appropriately. It can also help identify some diseases and digestive problems that keep the body from absorbing the nutrients in food. 

Patients must FAST, avoiding all food and beverages, for 10 hours before the test and must avoid alcohol for a full 24 hours before the blood is drawn. This prevents outside factors from influencing the results. It may also be necessary to temporarily discontinue retinol or other medications to get an accurate result.