vitamin A (generic name)
a vitamin - treats Viral infection, Measles, Skin cancer prevention, HIV Infection, Cataract prevention, Malaria, Eye disorders, Iron deficienc...
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TraditionWARNING: DISCLAIMER: The below uses are based on tradition, scientific theories, or limited research. They often have not been thoroughly tested in humans, and safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider. There may be other proposed uses that are not listed below.
Aging, allergic rhinitis, anemia, asthma, bronchopulmonary dysplasia in premature infants, burns, candidiasis, chemical sensitivities (pollutant protection), conjunctivitis, Crohn's disease, cystic fibrosis, deafness, deficiency (protein), diabetes, eczema, fibrocystic breast disease, glaucoma, headache (persistent), heart disease, herpes (cold sores), hyperthyroidism, increasing sperm count, infant eye / brain development, infections, kidney stones, leukoplakia, Lichen planus pigmentosus, liver disease, menorrhagia (heavy menstruation), metabolic disorders (Hurler syndrome), neurodegenerative diseases, nutritional supplement, pancreatitis, periodontal disease, pityriasis rubra pilaris, premenstrual syndrome, psoriasis, respiratory disorders, rhinitis, sebaceous cysts, sinusitis, skin disorders (ichthyosis, Darier's disease), sleep (regulation), sunburn, tinnitus, ulcers (stress ulcers in severely ill hospitalized patients), urinary tract infections, vaginal atrophy, vaginitis, vision enhancement (nearsightedness, blurred vision), warts.
Sources of Vitamin A
Vitamin A is found in dairy products, fish, darkly colored fruits and vegetables. Consumption of five servings of fruits and vegetables per day supplies 5-6 milligrams per day of provitamin A carotenoids, which provides about 50-65% of the adult RDA for vitamin A.
Adults (over 18 years old)
Vitamin A is included in most multivitamins, often in 5,000 IU doses as softgels, capsules, tablets, or liquid. U.S. Recommended Daily Allowance (RDA) for adults have been established by the U.S. Institute of Medicine of the National Academy of Sciences. Recommendations are: 900 micrograms per day (3,000 IU) for men and 700 micrograms per day (2,300 IU) for women. For pregnant women 19 years and older, 770 micrograms per day (2,600 IU) is recommended. For lactating women 19 years and older, 1,300 micrograms per day (4,300 IU) is recommended.
For vitamin A deficiency not involving xerophthalmia, 100,000 IU orally or intramuscularly administered daily for three days, followed by 50,000 IU per day for two weeks has been used. A maintenance dose of 10,000 to 20,000 IU per day for two months has been recommended.
Supporting care following chemotherapy may include weekly injections of 100,000 IU vitamin A. Patients receiving vitamin A should be observed carefully for liver toxicity.
Injections should always be performed by a licensed healthcare provider.
Children (under 18 years old)
Recommended Dietary Allowances (RDA) have been established by the U.S. Institute of Medicine of the National Academy of Sciences. Recommendations are: for children 1-3 years-old, 300 micrograms per day (1,000 IU); for children 4-8 years-old, 400 micrograms per day (1,300 IU); and for children 9-13 years-old, 600 micrograms per day (2,000 IU). For pregnant women between 14-18 years-old, 750 micrograms per day (2,500 IU) is recommended; for lactating women between 14-18 years-old, 1,200 micrograms per day (4,000 IU) is recommended.
The World Health Organization (WHO) has established dosage guidelines for children between 6-11 months old to receive 100,000 IU of vitamin A. This increases to 200,000 IU every six months from 12 to 59 months of age.