Klaire Labs SFI Health L-Methylfolate - 1000 mcg (1 mg) Metafolin L-5-MTHF, 60 Capsules

L-Methylfolate vs Folic Acid: Why Choose the Active Form?

Discover Klaire Labs Health — Many supplements contain folic acid, a synthetic form of folate that requires conversion in the body to become active. However, a significant proportion of the population—up to 40%—carries genetic variants (MTHFR) that impair this conversion. L-Methylfolate (L-5-MTHF) bypasses this step, providing the body with the already active form. This makes it a more reliable choice for supporting methylation and other folate-dependent processes. The Metafolin® used in this product is a patented, highly pure crystalline form of L-5-MTHF.

What Is L-Methylfolate?

L-Methylfolate, also referred to as L-5-MTHF (5-methyltetrahydrofolate), is the biologically active form of folate. Unlike folic acid, it is ready for the body to uses immediately. Each capsule supplies 1,000 mcg (1 mg) of folate as Metafolin L-5-MTHF, providing 1,700 mcg DFE (Dietary Folate Equivalents). This water-soluble B vitamin (B9) is naturally present in foods and plays a crucial role in DNA synthesis, cell division, and red blood cell formation. Its methylated form is particularly important for methylation, a biochemical process that supports detoxification, neurotransmitter synthesis, and homocysteine metabolism.

Health Benefits of L-Methylfolate

L-Methylfolate contributes to several aspects of health. It supports normal homocysteine metabolism, which is important for cardiovascular health, and contributes to normal red blood cell formation, helping to reduce tiredness and fatigue. Additionally, it contributes to normal psychological function, making it relevant for mood balance. Because it is already in its active form, it is efficiently utilised by the body, offering a preferred option for those who have difficulty converting synthetic folic acid, such as individuals with MTHFR gene variants.

Who Should Take L-Methylfolate?

L-Methylfolate may be particularly beneficial for women planning pregnancy or during pregnancy, as adequate folate intake supports normal foetal neural tube development. It is also suitable for individuals with elevated homocysteine levels, those looking to support cognitive health, and anyone aiming to maintain overall methylation balance. Since this supplement is hypoallergenic and free from common allergens—including milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, soybeans, and corn—it is ideal for people with sensitivities or dietary restrictions. It also contains no artificial colours, flavours, or preservatives.

Recommended Dosage

The typical dosage is one capsule (1,000 mcg or 1 mg) per day. The recommended dietary allowance (RDA) for folate varies: 400 mcg DFE for most adults, 600 mcg DFE during pregnancy, and 500 mcg DFE while breastfeeding. This product provides 1,700 mcg DFE per capsule, meeting or exceeding these requirements. The tolerable upper intake level (UL) for folate from supplements is 1,000 mcg per day for adults, so this dosage is within safe limits. As with any supplement, it is advisable to consult a health care practitioner before beginning uses.

How to Choose a Quality L-Methylfolate Supplement

When selecting a folate supplement, check the label for the specific form and amount in both micrograms and DFE. Look for third-party testing to ensure purity and potency. Klaire Labs, a brand trusted by health care practitioners since 1969, formulates products in collaboration with physicians. Their supplements are hypoallergenic and free from unnecessary additives, making them a reliable choice. Certifications such as non-GMO and allergen-free statements are also important. The product should be manufactured in a cGMP-compliant facility. Avoid supplements with vague labels or proprietary blends that do not specify exact doses.

Potential Side Effects and Precautions

L-Methylfolate is generally well tolerated, but some individuals may experience mild gastrointestinal upset, nausea, or sleep disturbances. High doses may mask vitamin B12 deficiency, especially in older adults. If you are taking medication or have a medical condition, consult your health care provider before uses. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. This product is not intended to diagnose, treat, , or prevent any disease.

Frequently Asked Questions

Can I take L-methylfolate during pregnancy or breastfeeding?

Yes, L-methylfolate is often recommended during pregnancy to support foetal development. However, always discuss the appropriate dosage with your health care provider.

How does L-methylfolate support mood?

L-Methylfolate is involved in the synthesis of neurotransmitters such as serotonin and dopamine. Adequate levels may help maintain a healthy mood and emotional balance, contributing to normal psychological function.

Is this product suitable for vegans?

The capsule is likely made from cellulose (vegetable), but please check the label for confirmation. The product is free from animal-derived ingredients and common allergens.

Can I take this with other B vitamins?

Yes, L-methylfolate works synergistically with vitamin B12 (especially methylcobalamin) and other B vitamins. Many people take them together for comprehensive methylation support.