Folate Supplement Guide
Evidence-based information on Folate benefits, dosage, safety, and food sources — sourced from NIH, FDA, and PubMed.
Our assessment
The evidence shows that folate is a critical B vitamin for DNA repair, methylation, and homocysteine reduction NIH ODS ↗. However, the data indicates a very low risk profile based on FDA adverse event reports, with only 7 total reports on file FDA FAERS ↗. You should be aware of the specific upper limits and potential interactions before starting supplementation.
How it works
Think of folate as a cellular repair specialist. It supports DNA repair and methylation pathways, which are essential for healthy cell division NIH ODS ↗. It also reduces homocysteine levels through methylation pathways and influences serotonin and dopamine synthesis, which can affect mood regulation NIH ODS ↗. Additionally, folate supports phase II detoxification processes in the body NIH ODS ↗.
Safety profile
Folate that is naturally present in food and beverages is not harmful NIH ODS ↗. However, you should not consume folate in supplements or fortified foods above the upper limit unless recommended by a health care provider NIH ODS ↗. Taking large amounts of folate supplements might hide a vitamin B12 deficiency because these supplements can correct the anemia that the vitamin B12 deficiency causes NIH ODS ↗. The FDA received 7 total adverse event reports for this product FDA FAERS ↗. Folate supplements can also interact with medications, including potentially interfering with methotrexate (Rheumatrex, Trexall) when taken to treat cancer NIH ODS ↗.
Our recommendation
Start by checking your current folate levels through a blood test. Do not exceed the upper limit for supplemental folate unless your healthcare provider advises it, as high doses can mask a vitamin B12 deficiency NIH ODS ↗. If you are taking methotrexate for cancer, discuss folate supplementation with your oncologist first due to potential interactions NIH ODS ↗. For most adults, a standard multivitamin containing 400 mcg of folate is sufficient for general health NIH ODS ↗.
AI-assisted analysis based on NIH ODS, FDA, and PubMed data. Citations are linked to original sources.
Recommended Dosage
| Life Stage | Recommended Amount |
|---|---|
| Birth to 6 months | 65 mcg DFE |
| Infants 7–12 months | 80 mcg DFE |
| Children 1–3 years | 150 mcg DFE |
| Children 4–8 years | 200 mcg DFE |
| Children 9–13 years | 300 mcg DFE |
| Teens 14–18 years | 400 mcg DFE |
| Adults 19+ years | 400 mcg DFE |
| Pregnant teens and women | 600 mcg DFE |
| Breastfeeding teens and women | 500 mcg DFE |
Source: National Academies of Sciences, Engineering, and Medicine. Always consult your healthcare provider for personalized dosage recommendations.
Drug Interactions
Folate supplements can interact with several medications. Here are some examples: Folate supplements could interfere with methotrexate (Rheumatrex, Trexall) when taken to treat cancer. Taking antiepileptic or antiseizure medications, such as phenytoin (Dilantin), carbamazepine (Carbatrol, Tegretol, Equetro, Epitol) and valproate (Depacon), could reduce blood levels of folate. Also, taking folate supplements could reduce blood levels of these medications. Taking sulfasalazine (Azulfidine) for ulcerative colitis could reduce the body’s ability to absorb folate and cause folate deficiency. Tell your doctor, pharmacist , and other health care providers about any dietary supplements and medicines you take. They can tell you if those dietary supplements might interact or interfere with your prescription or over-the-counter medicines or if the medicines might interfere with how your body absorbs, uses, or breaks down nutrients.
Check All InteractionsClinical Evidence
Folate has been studied in 3+ clinical studies:
Dietary supplement and medication use in professional and pre-professional dancers: widespread use b...Vela-Andreu M · 2026
Optimization and Validation of an HPLC-PDA Method for the Determination of (6S)-5-Methyltetrahydrofo...Heo YJ · 2026
Melatonin as a Potential Dietary Supplement to Counteract Glyphosate-Induced Decline in Honeybee Pop...Fan W · 2026
Health Goals This Supplement Supports
Frequently Asked Questions
How much Folate should I take daily?
Refer to the Recommended Dosage table above. Individual needs vary by age, gender, and health status. Always follow the dosage on your supplement label and consult your healthcare provider.
What are the side effects of Folate?
Folate that is naturally present in food and beverages is not harmful. However, you should not consume folate in supplements or fortified foods and beverages in amounts above the upper limit, unless recommended by a health care provider. Taking large amounts of folate supplements might hide a vitamin B12 deficiency because these supplements can correct the anemia that the vitamin B12 deficiency ca
Does Folate interact with medications?
Folate supplements can interact with several medications. Here are some examples: Folate supplements could interfere with methotrexate (Rheumatrex, Trexall) when taken to treat cancer. Taking antiepileptic or antiseizure medications, such as phenytoin (Dilantin), carbamazepine (Carbatrol, Tegretol,