Thorne 5-MTHF - Methylfolate (Active B9 Folate) - 5 mg, 60 Capsules

What Is the Difference Between Folic Acid and 5-MTHF?

Folic acid is the synthetic form of folate used in many supplements and fortified foods. It requires multiple enzymatic steps to become active. In contrast, 5-MTHF (5-methyltetrahydrofolate) is the biologically active form that your body can use directly. For individuals with MTHFR gene variants that reduce conversion efficiency, this active form is often the preferred choice. Thorne's 5-MTHF uses Quatrefolic® (6S)-5-MTHF, a glucosamine salt known for its stability and absorption. It also carries a lower risk of masking vitamin B12 deficiency compared to high doses of folic acid.

Why Choose an Active Folate Like 5-MTHF?

Folate is essential for DNA synthesis, red blood cell formation, and overall wellness. Many supplements contain synthetic folic acid that must be converted to 5-MTHF in the body. Thorne's 5-MTHF provides the active form directly, bypassing conversion steps. This is particularly important for people with MTHFR mutations or those with conditions affecting folate metabolism. Each capsule delivers 5 mg (5,000 mcg) of Quatrefolic® (6S)-5-MTHF, a highly bioavailable form. With 60 capsules per bottle, a daily dose of one capsule provides a two-month supply.

Key Health Benefits of Methylfolate

Active folate supplementation supports normal homocysteine metabolism, which is important for cardiovascular health. By maintaining healthy homocysteine levels, 5-MTHF promotes proper blood vessel and nerve function.* For women of childbearing age, adequate folate supports fetal development, including neural tube formation. Additionally, 5-MTHF plays a role in methylation processes affecting mood regulation and cognitive health.* The active form is especially beneficial for those with impaired folate absorption due to gastrointestinal issues or medications.

Thorne's 5-MTHF also contributes to a healthy outlook by aiding neurotransmitter synthesis like serotonin and dopamine, vital for mood balance.* It supports nerve and circulatory function, making it a versatile supplement for overall wellbeing.*

Who Should Consider This Supplement?

Thorne 5-MTHF is ideal for individuals seeking an active folate form, especially those with MTHFR mutations, pregnant or nursing women, vegans, or anyone with increased folate needs. It is also suitable for older adults, athletes, and those supporting cardiovascular health and healthy aging. People taking medications that interfere with folate metabolism, like methotrexate, may also benefit. Always consult a healthcare professional before adding any supplement to your regimen, especially if you are pregnant, nursing, or have a medical condition.

Recommended Dosage and Usage

Each serving is one capsule, providing 5 mg (5,000 mcg) of methylfolate. For most adults, this dose meets daily requirements. Pregnant women typically require 400-800 mcg daily, but higher doses may be recommended by a healthcare provider. Take with or without food. Do not exceed the recommended serving size. The bottle contains 60 capsules, sufficient for 60 days. Store in a cool, dry place away from direct sunlight.

How to Choose a Quality Folate Supplement

Look for supplements using bioactive forms like 5-MTHF, third-party tested for purity and potency, and free from unnecessary additives. Thorne is a leading clinical brand recommended by healthcare practitioners (based on a 2026 independent survey). Their 5-MTHF is non-GMO, gluten-free, and contains No artificial preservatives. Thorne's manufacturing standards exceed certifications like NSF or USP, and they test for heavy metals and microbial contaminants. Thorne is trusted by over 100 professional sports teams.

Frequently Asked Questions

Can I take 5-MTHF instead of folic acid? Yes, 5-MTHF is a direct alternative for those needing active folate, especially if you have an MTHFR mutation.
Is 5 mg too high for daily use? The upper limit for folate from supplements is 1,000 mcg for most adults, but higher doses like 5 mg may be prescribed for certain conditions. Follow your healthcare provider's advice.
Does this product contain allergens? Thorne 5-MTHF is free of gluten, dairy, soy, and other common allergens. It is suitable for vegetarians and vegans.
Why choose Thorne over other brands? Thorne is trusted by over 100 professional sports teams and is the #1 recommended clinical brand among healthcare practitioners.
Can this supplement be taken with other medications? Generally safe, but consult your healthcare provider if you are taking anticoagulants or other medications to avoid interactions.
How long will one bottle last? At one capsule per day, 60 capsules last approximately two months.

*These statements have not been evaluated by Health Canada. This product is a natural health product and is not intended to diagnose, treat, , or prevent any disease. Always consult a healthcare practitioner before use.