The UL for adults 19 years and older is mg daily, with slightly lesser amounts in children and teenagers. This amount can only be achieved by taking supplements. Even higher amounts of vitamin B6 supplements are sometimes prescribed for medical reasons, but under the supervision of a physician as excess vitamin B6 can cause toxicity.
Vitamin B6 has been widely studied for its role in disease prevention. The vitamin in supplement form shows the most promise for the treatment of pregnancy-induced nausea, but such use should only occur under the supervision of a physician. Adequate blood levels of B6 may be associated with lower risk of cancers, compared to low blood levels.
However, the use of separate B6 supplements apart from the RDA amounts in typical multivitamin preparations is inconclusive and not recommended. High homocysteine levels are associated with an increased risk of heart disease and stroke as it may promote the formation of blood clots and excess free radical cells, and may impair normal blood vessel function.
A lack of adequate vitamin B6, along with vitamin B12 and folic acid , can increase homocysteine levels. Although epidemiological studies have found that vitamin B supplementation can decrease homocysteine levels, they have not consistently shown a decreased risk of cardiovascular events in taking the vitamins. Therefore the American Heart Association does not advocate for the use of B vitamin supplements for reducing cardiovascular disease risk.
However, there is a lack of controlled trials showing that supplementation can slow cognitive decline. A Cochrane review looked at 14 randomized controlled trials that evaluated the cognitive effects on people who used B vitamin supplements for at least three months. A systematic review of both epidemiological and clinical studies looked at the relationship of dietary intake or blood levels of vitamin B6 and all cancers.
However when total B6 intake from food and supplements was assessed, the protective effect weakened. The clinical studies did not find a protective effect of B6 supplements but the quality of these studies was rated low because B6 was not given alone and because cancer was not the main outcome studied.
The authors concluded an unclear role of vitamin B6 in cancer prevention because of the discrepancy between results from epidemiological and intervention studies. They suggested that higher levels of B6 in the body may reflect the status of other nutrients that are protective against cancer. Vitamin B6 is believed to play a role in colorectal cancer through its enzyme activity that may reduce oxidative stress and the spread of tumor cells.
Vitamin B6 deficiency is associated with chronic inflammation, a risk factor for colorectal cancer. Vitamin B6 has long been documented as a remedy to help relieve pregnancy-related nausea and its most severe form, hyperemesis gravidarum, which sometimes necessitates hospitalization due to severe dehydration. A vitamin B6 deficiency most often occurs when other B vitamins in the body are low, particularly vitamin B12 and folic acid. A mild deficiency may have no symptoms, but a more severe or prolonged deficiency can exhibit the following:.
Vitamin B6 is an important vitamin for many processes in the body, including the nervous system and metabolism. The body does not store this vitamin, so people need to get some from their diets each day. Most Americans get sufficient vitamin B6 from their diets. If not, a doctor may recommend dietary changes or taking vitamin B6 supplements. B vitamins are a group of eight related nutrients. This article takes a close look at all of the B vitamins, including their functions, sources, and….
What are some of the best foods for a healthful diet that will help you live a long and happy life? Read on to learn which dietary staples to keep in…. Vitamin B is essential for blood health. People with vitamin B deficiency may have a variety of symptoms, including fatigue, nerve problems, and….
Vitamins and nutrients are essential for good health. Some people supplement vitamins, but is there an ideal time of day to take them? In this article,. Vitamin B complex refers to the eight B vitamins. In this article, we take a closer look at each of these vitamins, the benefits of B-complex…. The benefits and food sources of vitamin B6. Health benefits Daily needs Food sources Deficiency Supplements Summary Vitamin B6 is a vitamin that benefits the central nervous system and metabolism.
Possible health benefits of vitamin B6. How much vitamin B6 should I have each day? Age Male Female 0—6 months 0. Food sources of vitamin B6. B6 deficiency.
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Epilepsy Behav. Disclaimer This fact sheet by the Office of Dietary Supplements ODS provides information that should not take the place of medical advice. Health Information.
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