Methylated Folate
The active, bioavailable form of folate (Vitamin B9) essential for numerous bodily functions.
Also known as: L-Methylfolate • 5-MTHF • L-5-Methyltetrahydrofolate
Overview
Methylated folate, or L-methylfolate, is the natural, active form of vitamin B9. Unlike synthetic folic acid, it does not need to be converted by the body and can be used immediately. This is particularly important for individuals with an MTHFR gene mutation, which can impair this conversion. Methylated folate is crucial for neurotransmitter synthesis, DNA production, and regulating homocysteine levels.
Key Benefits
Supports Mood and Mental Well-being
Plays a key role in the production of neurotransmitters like serotonin, dopamine, and norepinephrine, which are critical for mood regulation.
Essential for Fetal Development
Crucial for the proper development of the neural tube in a growing fetus, helping to prevent major birth defects.
Cardiovascular Health
Helps convert homocysteine into methionine, an essential amino acid. High levels of homocysteine are a risk factor for heart disease.
Supports Cellular Health and DNA Synthesis
Folate is necessary for the creation and repair of DNA, making it vital for cell growth and function.
Dosage & How to Take
Dosage varies widely based on individual needs. For general health, 400-1000 mcg is common. Therapeutic doses for conditions like depression can be much higher, up to 15 mg (15,000 mcg), and should be supervised by a doctor.
| Purpose | Dose | Notes |
|---|---|---|
| General Health & Pregnancy Support | 400-800 mcg/day | Often included in prenatal and B-complex vitamins. |
| Mood Support (Adjunctive) | 7.5-15 mg/day | Used as a medical food under physician supervision. |
| Homocysteine Reduction | 800 mcg - 5 mg/day | Often taken with vitamins B6 and B12. |
Best Time to Take
Can be taken at any time of day.
With or Without Food
Can be taken with or without food.
Forms & Bioavailability
| Form | Absorption | Best For | Notes |
|---|---|---|---|
| L-5-Methyltetrahydrofolate (L-5-MTHF) | High | Everyone, especially those with MTHFR mutations. | The most bioactive and readily usable form of folate. |
| Folic Acid (Synthetic) | High (but requires conversion) | Fortified foods and basic supplements. | Not ideal for individuals with MTHFR gene variants. |
Side Effects & Safety
Common
- Generally well-tolerated. Some may experience mild digestive upset initially.
Rare
- High doses may cause irritability, insomnia, or anxiety in sensitive individuals.
Contraindications
- High-dose folate can mask the symptoms of a Vitamin B12 deficiency, which can lead to irreversible nerve damage if left untreated. It's important to ensure adequate B12 intake.
Interactions
Folate can interfere with the action of methotrexate, a drug used for cancer and autoimmune diseases.
Some anti-seizure drugs (like phenytoin, carbamazepine) can lower folate levels in the body.
Scientific Research
L-methylfolate as adjunctive therapy for SSRI-resistant major depression
Supplementing with L-methylfolate showed significantly higher response rates in patients with major depression who were resistant to standard antidepressant therapy.
The MTHFR C677T polymorphism and folate status: a narrative review
This review highlights the importance of the MTHFR gene in folate metabolism and the increased need for methylated folate in individuals with the C677T polymorphism.
Food Sources
Products With Methylated Folate
1 product in our database contains this ingredient
Frequently Asked Questions
Medical Disclaimer
This content is for educational and informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen, especially if you have pre-existing health conditions or are taking medications. The statements on this page have not been evaluated by the Food and Drug Administration.