Supplement: Folic Acid

Supplement: Folic Acid

Supplement: Folic Acid

Folic Acid

Folic Acid

Folic Acid

Other Names:

5′-methyltetrahydrofolate, 5′-MTHF, Acide Folique, Acide Ptéroylglutamique, Acide Ptéroylmonoglutamique, Acido Folico, B Complex Vitamin, Complexe de Vitamines B, Complexe Vitaminique B, Dihydrofolate, Folacin, Folacine, Folate, Folinic Acid, L-methylfolate, Methylfolate, Méthylfolate, Pteroylglutamic Acid, Pteroylmonoglutamic Acid, Pteroylpolyglutamate, Tetrahydrofolate, Tétrahydrofolate, Vitamin B9, Vitamine B9.

Folic acid is a water-soluble B vitamin. Since 1998, it has been added to cold cereals, flour, breads, pasta, bakery items, cookies, and crackers, as required by federal law. Foods that are naturally high in folic acid include leafy vegetables (such as spinach, broccoli, and lettuce), okra, asparagus, fruits (such as bananas, melons, and lemons) beans, yeast, mushrooms, meat (such as beef liver and kidney), orange juice, and tomato juice.

Folic acid is used for preventing and treating low blood levels of folic acid (folic acid deficiency), as well as its complications, including “tired blood” (anemia) and the inability of the bowel to absorb nutrients properly. Folic acid is also used for other conditions commonly associated with folic acid deficiency, including ulcerative colitis, liver disease, alcoholism, and kidney dialysis.

Women who are pregnant or might become pregnant take folic acid to prevent miscarriage and “neural tube defects,” birth defects such as spina bifida that occur when the fetus’s spine and back don’t close during development.

Some people use folic acid to prevent colon cancer or cervical cancer. It is also used to prevent heart disease and stroke, as well as to reduce blood levels of a chemical called homocysteine. High homocysteine levels might be a risk for heart disease.

Folic acid is used for memory loss, Alzheimer’s disease, age-related hearing loss, preventing the eye disease age-related macular degeneration (AMD), reducing signs of aging, weak bones (osteoporosis), jumpy legs (restless leg syndrome), sleep problems, depression, nerve pain, muscle pain, AIDS, a skin disease called vitiligo, and an inherited disease called Fragile-X syndrome. It is also used for reducing harmful side effects of treatment with the medications lometrexol and methotrexate.

Some people apply folic acid directly to the gum for treating gum infections.

Folic acid is often used in combination with other B vitamins.

Folic acid is needed for the proper development of the human body. It is involved in producing the genetic material called DNA and in numerous other bodily functions.

Effective for:

Treating and preventing folic acid deficiency.

Likely Effective for:

Lowering homocysteine levels in people with kidney disease. About 85% of people with serious kidney disease have high levels of homocysteine. High levels of homocysteine have been linked to heart disease and stroke. Taking folic acid lowers homocysteine levels in people with serious kidney disease.
Lowering homocysteine levels (“hyperhomocysteinemia”) in people with high amounts of homocysteine in their blood. High levels of homocysteine have been linked to heart disease and stroke.
Reducing harmful effects of a medicine called methotrexate, which is sometimes used to treat rheumatoid arthritis and psoriasis. Taking folic acid seems to reduce nausea and vomiting, which are possible side effects of methotrexate treatment.
Decreasing the risk of certain birth defects (neural tube defects) when taken by pregnant women.

Possibly Effective for:

Reducing the risk of getting colorectal cancer. Getting more folic acid from the diet and supplements seems to lower the chances of developing colon cancer, but does not seem to help people who already have colon cancer.
Reducing the risk of breast cancer. The benefit is greater when women get extra vitamin B12 and vitamin B6 in their diet in addition to folic acid.
Depression, when used with conventional antidepressant medicines. Limited research suggests that folic acid alone won’t help with depression.
Treating a skin disease called vitiligo.
Gum problems due to a drug called phenytoin when applied to the gums.
Treating gum disease during pregnancy, when used in mouthwash.
Reducing the risk of pancreatic cancer.
Macular degeneration. Some research shows that taking folic acid with other vitamins including vitamin B6 and vitamin B12 might help prevent getting the eye disease called age-related macular degeneration.

Insufficient Evidence for:

Preventing re-blockage of blood vessels after angioplasty, a procedure to open a closed blood vessel. Taking folic acid plus vitamin B6 and vitamin B12 might actually interfere with healing in cases where a device (stent) is inserted in the blood vessel to keep it open.
Alzheimer’s disease. Limited evidence suggests that elderly people who get more folic acid than the recommended dietary allowance (RDA) appear to have a lower risk of developing Alzheimer’s disease than people who get less folic acid.
Memory and thinking skills in older people. There is conflicting evidence about the role of folic acid in age-related decline in memory and thinking skills.
Preventing cervical cancer. There is some evidence that increasing folic acid intake from dietary and supplement sources, along with thiamine, riboflavin, and vitamin B12, might help to prevent cervical cancer.
Male infertility. Some research suggests that taking folic acid plus zinc sulfate daily can increase sperm count in men with low sperm counts.
Lung cancer. There does not appear to be a relationship between low levels of folic acid and lung cancer.
Restless leg syndrome. Taking folic acid seems to reduce symptoms. Researchers are studying whether folic acid deficiency causes restless leg syndrome.
Cancer due to a disease called ulcerative colitis. Taking folic acid might help to keep people with ulcerative colitis from getting cancer.
Liver disease.
Alcoholism.
Age-related hearing loss.
Sickle cell disease.
Weak bones (osteoporosis).
Other conditions.
More evidence is needed to rate folic acid for these uses.

Folic acid is LIKELY SAFE for most people. Most adults do not experience any side effects when consuming the recommended amount each day, which is 400 mcg.

High doses of folic acid might cause abdominal cramps, diarrhea, rash, sleep disorders, irritability, confusion, nausea, stomach upset, behavior changes, skin reactions, seizures, gas, excitability, and other side effects.

There is some concern that taking too much folic acid for a long period of time might cause serious side effects. Some research suggests that taking folic acid in doses of 800-1200 mcg might increase the risk of heart attack in people who have heart problems. Other research suggests that taking these high doses might also increase the risk of cancer such as lung or prostate cancer.

Don’t take more than 400 mcg per day unless directed by your healthcare provider.

Moderate Interaction. Be cautious with this combination.
Fosphenytoin (Cerebyx) interacts with FOLIC ACID
Fosphenytoin (Cerebyx) is used for seizures. The body breaks down fosphenytoin (Cerebyx) to get rid of it. Folic acid can increase how quickly the body breaks down fosphenytoin (Cerebyx). Taking folic acid along with fosphenytoin (Cerebyx) might decrease the effectiveness of fosphenytoin (Cerebyx) for preventing seizures.

Methotrexate (MTX, Rheumatrex) interacts with FOLIC ACID
Methotrexate (MTX, Rheumatrex) works by decreasing the effects of folic acid in the body’s cells. Taking folic acid pills along with methotrexate might decrease the effectiveness of methotrexate (MTX, Rheumatrex).

Phenobarbital (Luminal) interacts with FOLIC ACID
Phenobarbital (Luminal) is used for seizures. Taking folic acid can decrease how well phenobarbital (Luminal) works for preventing seizures.

Phenytoin (Dilantin) interacts with FOLIC ACID
The body breaks down phenytoin (Dilantin) to get rid of it. Folic acid might increase how quickly the body breaks down phenytoin (Dilantin). Taking folic acid and taking phenytoin (Dilantin) might decrease the effectiveness of phenytoin (Dilantin) and increase the possibility of seizures.

Primidone (Mysoline) interacts with FOLIC ACID
Primidone (Mysoline) is used for seizures. Folic acid might cause seizure in some people. Taking folic acid can along with primidone (Mysoline) might decrease how well primidone works for preventing seizures.

Pyrimethamine (Daraprim) interacts with FOLIC ACID
Pyrimethamine (Daraprim) is used to treat parasite infections. Folic acid might decrease the effectiveness of pyrimethamine (Daraprim) for treating parasite infections.


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