Folate
Over-the-counterWhat is Folate?
Folate is a water-soluble B vitamin that your body needs for healthy cell growth and function. Also called vitamin B9 or folacin, folate plays a key role in making DNA and RNA, the genetic material in all your cells. Your body cannot make folate on its own, so you must get it from food or supplements.
Folate exists naturally in leafy greens, beans, and citrus fruits. Folic acid is the synthetic form found in supplements and fortified foods. Your body converts folic acid into active folate forms that cells can use. Many people do not get enough folate from diet alone, especially during pregnancy or when taking certain medications.
This vitamin is essential for red blood cell formation and proper nervous system function. Folate works closely with vitamin B12 to help your body make new cells and keep existing cells healthy. It also helps convert homocysteine, an amino acid, into other useful substances your body needs.
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Common uses
- Preventing and treating folate deficiency and related anemia
- Supporting healthy fetal development during pregnancy
- Reducing the risk of neural tube defects in developing babies
- Supporting heart health by helping manage homocysteine levels
- Complementing treatment for depression in some cases
- Supporting healthy cell division and tissue growth
- Helping prevent side effects from methotrexate medication
How it works
Folate works by serving as a coenzyme, a helper molecule that allows important chemical reactions to happen in your cells. Your body needs folate to create and repair DNA, the instruction manual in every cell. Without enough folate, cells cannot divide properly or make new genetic material. This is especially important for rapidly dividing cells like red blood cells, skin cells, and cells in the digestive tract.
Folate also helps convert homocysteine, an amino acid in your blood, into methionine, another amino acid your body needs. High homocysteine levels are linked to heart disease risk. By helping keep homocysteine levels in a healthy range, folate supports cardiovascular health. Folate additionally works with vitamins B6 and B12 in this process, showing how B vitamins often work as a team in your body.
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Dosage information
Most adults take 400 to 800 micrograms of folate daily for general health. Pregnant women typically need 600 to 800 micrograms daily, while breastfeeding women need about 500 micrograms. People with folate deficiency may need higher doses, sometimes 1,000 to 5,000 micrograms daily, as directed by their healthcare provider. The upper limit for adults is 1,000 micrograms of folic acid from supplements and fortified foods daily. Always follow the dosing instructions on the product label or as recommended by your healthcare provider.
Side effects
- Nausea or upset stomach
- Trouble sleeping
- Gas or bloating
- Bitter or unpleasant taste in the mouth
- Irritability or mood changes
- Skin rash or itching
Serious side effects are rare but can include allergic reactions with difficulty breathing, severe rash, or swelling of the face and throat. High doses of folic acid can mask vitamin B12 deficiency, which can lead to nerve damage if left untreated. Contact your healthcare provider if you experience unusual symptoms or if side effects persist.
Drug interactions
- Methotrexate: Folate can reduce the effectiveness of this medication, but may also be prescribed alongside it to reduce side effects
- Anti-seizure medications like phenytoin, carbamazepine, and valproic acid may lower folate levels
- Sulfasalazine can interfere with folate absorption
- Metformin may reduce folate levels in the body
- Proton pump inhibitors and H2 blockers may decrease folate absorption
- High doses of folic acid can mask vitamin B12 deficiency
- Alcohol can interfere with folate absorption and increase folate loss
Blood test monitoring
Regular blood tests can help ensure your folate levels stay in a healthy range and that supplementation is working properly. Testing your folate levels directly shows whether you have enough of this vitamin in your blood. Homocysteine testing is also valuable because high homocysteine levels may indicate folate deficiency or that you need more B vitamins. Many healthcare providers recommend checking vitamin B12 levels alongside folate, since these vitamins work together and high folate can mask B12 deficiency. Rite Aid offers blood testing services that measure over 200 biomarkers including folate and homocysteine, helping you track your nutritional status and heart health markers over time.
Taking Folate? Monitor your levels.
- Track how your body responds
- Catch side effects early with blood work
- Share results with your doctor
Frequently asked questions
Yes, folate supplements are available over the counter without a prescription. You can find them in various forms including tablets, capsules, and liquids. Most multivitamins also contain folate or folic acid.
Folate is the natural form of vitamin B9 found in foods like leafy greens and beans. Folic acid is the synthetic form used in supplements and fortified foods. Your body converts folic acid into active folate forms that cells can use.
Women who are pregnant or planning to become pregnant should take folate to prevent birth defects. People with folate deficiency, those taking certain medications like methotrexate, and individuals with absorption issues may also benefit. Talk to your healthcare provider about whether supplementation is right for you.
You can take folate supplements at any time of day, with or without food. Taking it with food may help reduce stomach upset if that occurs. Choose a time you can remember easily to help build a consistent routine.
Folate levels in your blood typically start to improve within a few weeks of daily supplementation. For treating folate deficiency anemia, you may notice improvements in energy and symptoms within 4 to 6 weeks. Blood test results can confirm that your levels are improving.
Natural folate from food is not known to cause harm, even in large amounts. However, the upper limit for folic acid from supplements and fortified foods is 1,000 micrograms daily for adults. Very high doses can mask vitamin B12 deficiency, which can lead to nerve damage if undetected.
Testing is helpful if you have symptoms of deficiency like fatigue, weakness, or pale skin. It is also useful if you are pregnant, have absorption issues, take medications that affect folate, or have high homocysteine levels. Regular testing helps ensure your supplementation is working and levels stay healthy.
Common signs include fatigue, weakness, pale skin, shortness of breath, and mouth sores. You may also experience irritability, difficulty concentrating, or headaches. Severe deficiency can cause a type of anemia called megaloblastic anemia, where red blood cells are abnormally large.
Yes, folate can interact with several medications including methotrexate, anti-seizure drugs, and sulfasalazine. Some medications like metformin and acid reducers can lower your folate levels. Always tell your healthcare provider and pharmacist about all supplements you take to avoid interactions.
Rite Aid offers blood testing services that measure over 200 biomarkers including folate and homocysteine. With two tests per year for $349 annually, you can track your nutritional status and see how supplementation affects your levels. Regular monitoring helps ensure your folate intake is meeting your body's needs.