Found in nutritional supplements, folic acid is the synthetic version of folate, also called vitamin B-9. Though people need between 150 and 600 mcg of folate or folic acid daily, depending on their age, taking too much of this nutrient may be problematic. Talk with your physician about the side effects of taking too much folic acid before you begin using this nutritional supplement.
Stomach Upset
High doses of folic acid may cause severe stomach irritation. You may feel nauseated or bloated and may develop diarrhea. Recurrent bouts of diarrhea may be accompanied by cramping or pain and can increase your risk of becoming dehydrated. Contact your doctor for further evaluation if stomach discomfort or diarrhea persists for more than a couple of days.
Mood Changes
Unusual mood or behavioral changes may arise as a consequence of having too much folic acid in your body. You may feel confused, excited, anxious or irritable or may find it difficult to complete tasks associated with your normal daily activities. Discuss any sudden or significant mood or behavioral changes with your physician immediately, because these side effects may also be signs of other health problems, such as a brain injury or tumor.
Skin Reaction
Too much folic acid may cause milk to moderate skin reactions in certain people. You may develop red, inflamed patches of skin across your body that itch or appear dry or flaky. Though such side effects are usually temporary, contact your doctor if skin irritation persists or becomes severe.
Seizure
You may experience a seizure as a side effect of taking high doses of folic acid. A seizure may cause a temporary lapse in consciousness or involuntary body spasms. If you experience a seizure, contact your medical provider for further care. Anyone with a personal history of a seizure disorder, such as epilepsy, shouldn't take folic acid supplements because such treatment may worsen their condition.
Difficulty Sleeping
Difficulty falling asleep or staying asleep is a side effect that may develop if you take too much folic acid. Sleeping problems may cause increased daytime fatigue, which may make it challenging for you to remain focused or attentive while at work, home or school. Consult your doctor if sleeping problems persist for more than a week.
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