Vitamin A (retinol) is a yellow, fat-soluble, generic term for a large number of related compounds obtained from some carotenoids by conversion in the liver, its storage organ. Vitamin A is essential for growth and reproduction, maintaining healthy vision, and supporting protein synthesis and cell differentiation.*Vitamin A and its analogs have shown the ability to help maintain proper DNA function. One study, however, has shown that for certain lifestyles (e.g., smokers) supplemental intake of too much beta-carotene in the absence of other carotenoids and antioxidants (such as at least 400 IU/day of vitamin E) may be harmful.Anyone taking very high doses of vitamin A should do so under the care of a physician.ReferencesSupplement FactsServing Size 1 drop (45 mg)Servings Per Container 590Amount Per ServingVitamin A 20,000 IUOther ingredients: sunflower seed oil, polysorbate 80, cassia oil blend (cinnamic aldehyde, clove leaf oil, cinnamon leaf oil, eugenol).This product contains NO milk, egg, fish, peanuts, crustacean shellfish (lobster, crab, shrimp), soybeans, tree nuts, wheat, yeast, gluten, corn, or rice. Contains NO sugar, and no artificial sweeteners, flavors, colors, or preservatives.Dosage and UseTake one drop daily with a fat-containing, low fiber meal, or as recommended by a healthcare practitioner.Levels of > 10,000-25,000 IU/day may cause congenital deformity, fatigue, headache, mouth fissures, and increased pressure on the brain. Should be used with serum levels as guidance, and never during pregnancy.