L-MethylFolate delivers folate in its most active form for rapid absorption, and supports healthy methylation and lower homocysteine, while Klaire Labs' trusted allergen-free production offers reliable quality. This star ingredient, L-5-MTHF, bypasses the usual metabolic steps to help people with folate conversion barriers. Klaire Labs has a long heritage of strict quality standards, with Metafolin® from Merck KGaA underpinning the formulation with traceable, pure ingredients.

Available Sizes & Variants:

60 Capsules - standard bottle for daily use.

Benefits & Features:

• Supports healthy methylation and homocysteine balance.
• The key active ingredient, L-5-MTHF from Metafolin, is built for fast absorption and ready utilisation by the body, supporting methylation pathways and helping keep healthy homocysteine levels.
• Intended for daily use as a folate supplement to support mood, nervous system function, and overall folate status.
• Manufactured in a GMP registered facility to ensure purity and potency.
• Free from common allergens and artificial additives, making it suitable for sensitive diets.

Klaire Labs brings decades of expertise to this premium folate supplement. The L-MethylFolate uses Metafolin®, a bioactive methyl folate form, to support uptake and reliability. The product is produced in a GMP registered facility and is allergen-free, reflecting Klaire Labs’ commitment to purity and potency. Metafolin® from Merck KGaA helps ensure traceability and consistent quality, making it a trusted choice for those who need methylated folate, including individuals with folate conversion barriers. It fits neatly into a daily routine alongside probiotics or a vitamin d supplement.

(other) Microcrystalline cellulose, vegetarian capsule (hydroxypropyl methylcellulose, water), L-leucine, cellulose, and silicon dioxide.

• GTIN: 828054001015
• Manufacturer: Klaire Labs
• Categories: Klaire LabsNew ArrivalsPopular Supplement Brands
• 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 with food, or follow your healthcare professional's instructions. As a food supplement\, take 3 capsules daily\, with a meal\, or as directed by your healthcare professional

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

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

L-5-Methylfolate is essentially the most active, methylated form of folate used to support normal metabolic folate status.

This ingredient is provided as L-5-MTHF to bypass common metabolic steps, which is used in allergen-free, high-purity supplement formulations.

What Does L-5-MTHF Do?

L-5-MTHF helps maintain folate status and also plays a role in normal methylation processes which are important for nerve and cognitive function in line with EFSA guidance.

Dr. Lamers of Maastricht University found that 5-MTHF can improve folate status and lower homocysteine, which contributes to healthy metabolic function.

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

Klaire Labs stands out for quality from sourcing all the way to final production. The brand runs in a GMP-registered facility, underscoring a steady commitment to purity and potency across all products. Klaire Labs’ allergen-free production and use of Metafolin® as a trademarked, traceable ingredient further emphasise strong manufacturing controls and ingredient integrity.

At Welzo we require stringent quality and safety standards, and Klaire Labs meets these through solid manufacturing excellence and a clear focus on hypoallergenic formulations. This fits our selection criteria for reputable, science-led brands with transparent processes. The brand's hands-on approach to precision folate delivery—providing L-5-MTHF in its most active form—lines up with our product development priorities and our expectations for reliable ingredient sourcing.

This brand was assessed by our medical team for compliance with our rigorous testing protocols, ensuring suitability for the British market. Klaire Labs’ product, L-MethylFolate, is particularly well suited for immediate absorption and steady potency, making it a solid partner for this supplement category.