|Aging|| Parkinson's Disease / Risk
| ||Vitamin A works with other antioxidants to provide a protective effect.|
Allergy / Intolerance to Foods (Hidden)
| ||Please see the link between Food Allergy and Digestive Enzymes.|
Allergic Rhinitis / Hay Fever
| ||The following vitamins can help your symptoms: vitamin A (10,000 to 15,000 IU per day); vitamin B6 (50 to 100mg per day); vitamin B5 (50 to 75mg per day); vitamin C (1,000mg three to four times per day); vitamin E (400 IU per day).|
Gluten Sensitivity / Celiac Disease
| ||In one study, six people with diet-treated celiac disease had abnormal dark-adaptation tests (indicative of �night blindness�), even though some were taking a multivitamin that contained vitamin A. Some of these people showed an improvement in dark adaptation after receiving larger amounts of vitamin A (10,000�25,000 IU per day), either orally or by injection. [Lancet 1973;2: pp.1161-4]|
Anemia (Iron deficiency)
| ||Vitamin A and iron supplementation had the following effect on anemic pregnant women: 35% became non-anemic with only Vitamin A. 68% became non-anemic with just iron supplementation. 97% became non-anemic after supplementation with both Vitamin A and iron. [Lancet, 342 (8883), November 27, 1993, pp.1325-1328]|
IBS (Irritable Bowel Syndrome)
| ||See the link between IBS and Vitamin B12.|
Histadelia (Histamine High)
Immune System Imbalance (TH2 Dominance)
| ||Vitamin A deficiency appears to be both a consequence of Lyme disease (Borrelia burgdorferi infection) and a factor in the resulting arthritis susceptibility. Although not known definitively, taking vitamin A may improve joint symptoms. Vitamin A-deficient mice were found to be more susceptible to arthritis following infection by the spirochete that produces Lyme disease in humans. [J Infect Dis 1996 Oct;174(4): pp.747-51]|
| ||One of the fat soluble vitamins, along with D and E, which may not be absorbed properly in CF. There are water soluble preparations of these available.|
Not recommended for:
Metabolic Diet Type
Not recommended for:
Osteoporosis / Risk
| ||In a study of 72,337 women aged 34-77 years, there were 603 incidences of hip fracture. Women taking a vitamin A supplement had a 40% increased risk of hip fracture. This risk was increased among those who consumed at least 3,000 mcg/day of retinol equivalents of vitamin A from the diet. [JAMA January 2, 2002;287(l): pp.47-54]|
Animal, human, and laboratory research suggest an association between greater vitamin A intake and weaker bones. Researchers have also noticed that worldwide, the highest incidence of osteoporosis occurs in northern Europe, a population with a high intake of vitamin A. However, decreased biosynthesis of vitamin D associated with lower levels of sun exposure in this population may also contribute to this finding.
To further test the association between excess dietary intake of vitamin A and increased risk for hip fracture, researchers in Sweden compared bone mineral density and retinol intake in approximately 250 women with a first hip fracture to 875 age-matched controls. They found that a dietary retinol intake greater than 1,500 mcg/day (more than twice the recommended daily intake for women) was associated with reduced bone mineral density and increased risk of hip fracture as compared to women who consumed less than 500 mcg per day. [Ann Intern Med. 1998;129: pp.770-778]
If osteoporosis is present, and vitamin A treatment is indicated for other reasons, it would be wise to limit the duration of high dose vitamin A use.
There is no evidence of an association between beta-carotene intake and increased risk of osteoporosis. Current evidence points to a positive osteoporosis risk in postmenopausal women who are consuming increased amounts of food or supplemental vitamin A in its retinol form only.
Vitamin A Requirement
Not recommended for:
Vitamin A Toxicity
Diabetes Type II
| ||Recent research shows that Type II diabetics who consumed foods high in vitamin A were the most efficient insulin users. [Facchini, F., et al. "Relation between dietary vitamin intake and resistance to insulin-mediated glucose disposal in healthy volunteers," Am J of Clin Nutr 63: pp.946-49, June 1996]|
| ||Fat-soluble vitamins such as A, D, E and K are absorbed more efficiently in the presence of fat. A low fat diet results in poorer absorption of the fat soluble vitamins. |
Bile (from the liver and gallbladder) breaks down large fat molecules to tiny droplets which provide lipase (from the pancreas) with an enormously increased surface to work on. This action takes place in the small intestine and the lipase involved here is a part of the pancreatic secretion.
| ||When you enter a dark room, the vitamin A changes shape and helps your eyes realize that you've entered a dark room. |
Despite this heavy demand for vitamin A, it still is pretty hard to develop a deficiency of this nutrient in the United States, where the foods in which it is contained are plentiful. Common staples such as milk and margarine are fortified with vitamin A, and orange and yellow foods such as sweet potatoes and carrots are rich sources of beta-carotene. (Beta-carotene is a precursor of vitamin A and converts to vitamin A in the body.) We need to depend on outside sources for vitamin A because the body can't make its own.
A healthy liver is usually able to store up to a year's supply of vitamin A. You would have to be chronically deprived of vitamin A food sources for quite a while for it to affect your sight, as is the case with millions of children in developing nations.
"Night blindness resulting from vitamin A deficiency is very, very, very, very rare in individuals who live in America," says Dr. Reichel. And even if it does develop, it can frequently be reversed within an hour by injections of vitamin A.
Most people with night blindness have eyes that mobilize vitamin A so slowly that it takes a while to adjust to the dark, says Dr. Reichel. People notice it most often when they're going into theaters or driving at night.
| ||Vitamin A (150,000-300,000iu/day) may help decrease sebum production also. This very high level of vitamin A can have toxic side effects over a long period of time, so must be used in a special form and under naturopathic supervision.|
| ||Vitamin A ( a water-soluble kind only) taken orally at 100,000IU /day for a month, then 50,000IU/day for 1 month, then 25,000IUK/day may cause warts to disappear. Vitamin A helps normalize cell resistance and assists the immune system. Do not take over 10,000IU/day if there is any chance of pregnancy.|
| ||Vitamin A can be useful in any skin healing process. Levels of 10-15,000 IUs are usually sufficient.|
| ||Vitamin A has been shown to be effective in treating acne when used at very high doses (300,000 to 400,000IU per day) for many months, but caution must be advised because vitamin A toxicity can result. The toxicity potential means that this therapy must be monitored closely, conducted with a water-soluble form of vitamin A and probably be used in lower doses (100,000 to 200,000IU) along with other therapies, not as a single treatment.|
| ||Vitamin A and vitamin D3 inhibit breast cancer cell division and can induce cancer cells to differentiate into mature, noncancerous cells. Vitamin D3 works synergistically with tamoxifen (and melatonin) to inhibit breast cancer cell proliferation. Breast cancer patients should take 4000 to 6000 IU of vitamin D3 every day on an empty stomach. Water-soluble vitamin A can be taken in doses of 100,000 to 300,000 IU every day. Monthly blood tests are needed to make sure toxicity does not occur in response to these relatively high daily doses of vitamin A and vitamin D3. After 4 to 6 months, the doses of vitamin D3 and vitamin A can be reduced. If pregnancy is a possibility, these doses of vitamin A should not be used.|
Menorrhagia (Heavy Periods)
| ||In one study, serum retinol levels (a measure of vitamin A levels) were found to be significantly lower in women with menorrhagia than in healthy controls. One should not exceed 10,000 IU per day if at risk of becoming pregnant.|
| ||Vitamin A can be used at 75,000 IU per day for 2 months or until Pap smear results improve, then 25,000 IU per day as a maintenance dose. The preferred form is water-soluble vitamin A. However, doses of vitamin A over 10,000 IU/day should not be considered if pregnancy is a possibility. Vitamin A injections into the cervix have been used successfully when other methods have failed.|
Susceptibility To Miscarriages
| ||Vitamin A, vitamin E, and beta-carotene levels tend to be lower in women who have miscarried; these nutrients are generally found in prenatal vitamins.|
Premenstrual Syndrome / PMDD
| ||Vitamin A has been shown to be beneficial in reducing PMS symptoms when given in doses of 100,000 to 300,000iu per day in the second half of the menstrual cycle. These levels should only be achieved by a water-soluble form of vitamin A and supervised by a Natural Doctor. Beta-carotenes may be better indicated since they are less toxic and endogenous regulation of conversion to retinol helps maintain more appropriate levels. The enzymatic conversion of beta-carotene to vitamin A is increased twofold during mid-ovulation. It is believed that there is a storage capacity for beta-carotene, which is converted to retinol as needed by the corpus luteum.|
| ||The risk of vitamin A deficiency is higher for young children whose mothers are vitamin A deficient. Maternal vitamin A deficiency results in reduced fetal stores and lower levels of vitamin A in breastmilk.|
Infants and young children who are vitamin A deficient are at an increased risk of appetite loss, eye problems, lower resistance to infections, more frequent and severe episodes of diarrhea and measles, iron deficiency anemia, and growth failure. Infections and inflammation accelerate the use and loss of vitamin A.
The increased risk of illness leads to an increased risk of death. Studies show that in communities where vitamin A deficiency is prevalent, improving vitamin A status reduces child deaths by an average of 23%. Vitamin A is particularly protective against deaths due to diarrhea and measles and may reduce the severity of malaria symptoms.
In the first six months of life, breastmilk protects the infant against infectious diseases that can deplete vitamin A stores and interfere with vitamin A absorption. Vitamin A intake of a breastfed child depends on the vitamin A status of the mother, the stage of lactation, and the quantity of breastmilk consumed. From birth to about six months of life, frequent breastfeeding can provide the infant with all the vitamin A needed for optimal health, growth, and development. Breastmilk is generally higher in nutritional value than alternative foods and liquids fed to children in developing countries. Consumption of other foods decreases the amount of breastmilk consumed and may disrupt the infant�s absorption of vitamins and minerals from the breastmilk. Therefore, exclusive breastfeeding until six months of age helps ensure sufficient vitamin A intake.
Not recommended for:
Possible Pregnancy-Related Issues
| ||The U.S. RDA is 4,000 IU or 800mg. NOTE: Be very careful to avoid high doses of over 10,000 IU per day during pregnancy or if there is a likelihood of becoming pregnant soon.|| |