L-Methylfolate
Also called 5-MTHF / Methylfolate
L-Methylfolate (5-methyltetrahydrofolate, or 5-MTHF) is the biologically active form of folate that the body can use directly, without any enzymatic conversion. This makes it essential for people carrying MTHFR gene variants (C677T or A1298C) whose enzyme is impaired, leaving them unable to activate standard folic acid efficiently. Because it enters the methylation cycle immediately, it directly supports the production of neurotransmitters (serotonin, dopamine, norepinephrine) and the reduction of homocysteine. L-Methylfolate is the recommended form for supporting mood, cognition, and pregnancy in those with or without MTHFR mutations. A small percentage of individuals experience over-methylation symptoms (anxiety, irritability) when starting, beginning at a low dose (e.g. 200 mcg) and increasing gradually usually resolves this.
Best for
MTHFR gene variants, mood support, pregnancy
Absorption
High
Tolerability
Generally well tolerated; start low if sensitive
Typical timing
With or without food; morning is common to support daytime methylation
How to take L-Methylfolate
A typical dose of Folate (B9): 400–1,000 mcg DFE per day; up to 1,000 mcg L-Methylfolate for MTHFR. Best timing: With or without food; morning is common to support daytime methylation. The form you choose mainly affects absorption and how easily it sits with your stomach, not the overall dose.
Where to buy L-Methylfolate
Choose a third-party-tested brand; the label should name this form explicitly.
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