Folic acid, also called folate, is one of the vitamins in the B complex. In general, this nutrient family facilitates physical growth and cognitive development. The B vitamins are also essential for metabolism, helping your body turn food into energy. Folic acid, or vitamin B9, assists in DNA and red blood cell production. Taken as a dietary supplement, folate can cause adverse reactions. Consult your doctor before adding the pills to your daily regimen.
Respiratory Difficulties
In 2009, the "American Journal of Epidemiology" reported on an Australian study that investigated a link between folic acid and childhood asthma. The researchers concluded that women who take folate supplements in the late stage of pregnancy increase the risk of asthma for the children they are expecting. Drugs.com also lists bronchospasm as a potential side effect of taking folic acid. Bronchospasm occurs when your bronchial smooth muscles go into a spasm that constricts the lung's air passages. That results in impaired breathing.
Gastrointestinal Problems
Loss of appetite, bloating, gas, cramps, diarrhea and nausea are possible gastrointestinal side effects when you take folic acid supplements. You may also develop a bitter taste in your mouth and a stomach inflammation.
Neurological Side Effects
According to MayoClinic.com, individuals who take folic acid supplements may become irritable and experience sleep problems. Mental impairment ranging from mild confusion to psychotic delusion is also a possible reaction to taking vitamin B9. If you have a seizure disorder, the supplement may induce more seizures than you normally experience.
Other Reactions
Supplementation with folic acid may cause urticaria and other types of rashes, itching and flushing. Hair loss anywhere hair normally grows -- a condition known as alopecia -- is also possible, says MayoClinic.com. Taking folic acid in combination with vitamins B6 and B12 supplements can also constrict your arteries once again after you have corrective surgery for the condition.
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