5-MTHF is a folate supplement that blends reliable in house production with Ultra Tested purity, delivering consistent quality from Kirkman Laboratories. In house production allows exacting quality controls at every step, so you get a consistent, reliable folate option you can trust. Ultra Tested protocols push purity to the highest standards, with more than 950 environmental contaminants checked, and comprehensive finished product testing.

Available Sizes & Variants:

180 capsules - long lasting supply for steady daily use.

Benefits & Features:

• Purity you can trust for prenatal vitamins.
• In house production and Ultra Tested assays ensure this folic acid supplement delivers consistent potency while being tested for a wide range of contaminants, giving you real peace of mind.
• In house manufacturing supports consistent potency and reduces variability across every batch.
• Kirkman focuses on special needs and sensitivities, meaning careful ingredient sourcing and controlled processing to minimise irritants and ensure reliable everyday use.
• Daily use fits naturally into busy routines, whether paired with prenatal vitamins or a vitamin d supplement.

Kirkman is a name many families trust, especially for those planning careful nutrition with sensitivities in mind. The brand’s strength is built on decades of expertise and a commitment to rigorous standards. The in-house 25,000 square foot facility is FDA licensed and cGMP certified, guided by more than 1,200 SOPs. Ultra Tested purity checks screen for hundreds of contaminants, while independent testing confirms potency and stability. This heritage and these controls help Kirkman earn confidence in prenatal vitamins and folic acid supplement routines.

Calcium Folinate, Microcrystalline Cellulose, Vegetarian Capsule (Hypromellose and water)

• GTIN: 812325028627
• Manufacturer: Kirkman Laboratories
• Categories: Best SellersKirkman Labs SupplementsNew ArrivalsPopular Supplement BrandsSubscribe & Save Products
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take one capsule daily or as instructed. 1/4 to 0.8 teaspoon (1 to 4 ml) daily with juice or food to mask the highly concentrated mineral flavor. To top off or fully supplement your diet with magnesium\, we recommend starting with 1/4 teaspoon and increasing as needed\, ideally spread throughout the day. We also recommend taking Mega-Mag with a large glass of fluid. Excess magnesium may cause a laxative effect.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: 5-Methyltetrahydrofolate (5-MTHF)

5-Methyltetrahydrofolate, or 5-MTHF, is a folate form used in dietary supplements to make sure you’ve got a steady supply of folate. This product is produced with in-house quality controls and Ultra Tested purity to cut contaminants.

What Does 5-MTHF Do?

5-MTHF is sold as a folate supplement and this product sticks with consistency and quality through tight in-house production and testing standards.

This product is not intended to diagnose, treat, cure, or prevent any disease.

Kirkman Laboratories is Welzo Selected for its long-standing dedication to manufacturing excellence and patient-focused quality. This brand runs an FDA-licensed, cGMP-certified 25,000 sq. ft. facility and has honed its processes across more than 70 years of specialisation in products for individuals with special needs and sensitivities, a heritage that speaks to reliability and consistency.

What sets Kirkman apart is their vertical integration, with in-house production enabling stringent quality checks at every step. Their Ultra Tested® protocols signal a truly rigorous approach to purity, with raw ingredients checked for more than 950 environmental contaminants and finished products evaluated for a broad spectrum of contaminants and common allergens, backed by independent testing and certifications like NSF.

For Welzo, this brand alignment means a product-specific fit for 5-MTHF, supported by a proven quality framework and extensive third-party assurance. Our medical team has evaluated Kirkman against our stringent criteria, reinforcing trust in the partnership and in the standards we enforce for all customers. This thoughtful collaboration is reflected in Kirkman’s demonstrated commitment to safety, transparency, and manufacturing excellence our medical team and the standards we enforce.