What is MTHFR? The Gene Variant Affecting 40% of People

Walk into any pharmacy or health food shop and you'll find dozens of B vitamin supplements lining the shelves. But there's a crucial difference that most labels don't explain — a difference that determines whether a supplement actually works for you or simply passes through your system unused.

That difference is the form of the vitamin. And for the estimated 40% of people with MTHFR gene variants, it's not a minor detail. It's everything.

The Conversion Problem

Most B vitamins sold as supplements are synthetic, inactive forms. Your body must convert them into active forms before it can use them. This conversion depends heavily on the MTHFR enzyme. When MTHFR is impaired — as it is in up to 40-60% of the population — this conversion is significantly reduced or blocked entirely.

Folic Acid vs Methylfolate

Folic acid is the synthetic form of vitamin B9. To be used by your body, it must be converted through multiple steps, with the final step requiring the MTHFR enzyme. If MTHFR is impaired, folic acid builds up unused in your bloodstream. Methylfolate (5-MTHF) is the active form your cells can use directly — no conversion, no MTHFR dependency.

Cyanocobalamin vs Methylcobalamin

Cyanocobalamin is the standard synthetic B12. It must be converted to the active form methylcobalamin before your nervous system can use it. Methylcobalamin is immediately bioavailable and participates directly in the methylation cycle and nerve function.

Pyridoxine vs P-5-P

Standard B6 (pyridoxine) requires liver conversion to P-5-P (pyridoxal-5-phosphate) before becoming active. P-5-P is the active coenzyme form that supports the transsulfuration pathway — an essential backup route for homocysteine clearance that operates independently of MTHFR.

Why NeuroThrive Uses Only Active Forms

Every B vitamin in the NeuroThrive range is already in its active, bioavailable form. For people with MTHFR variants, this is the difference between a supplement that works and one that doesn't.

NeuroThrive™ products are food supplements and are not intended to diagnose, treat, or cure any medical condition.