Folate is one of the hardest-working nutrients you have. It helps build DNA, make red blood cells, and run methylation, the everyday chemistry that keeps energy, mood and detox pathways ticking over. Most supplements include it. Far fewer are honest about the fact that the form of folate on the label can decide whether your body actually uses it.
That's the MTHFR story, and it's the reason the choice between methylfolate and folic acid isn't a technicality.
Folic acid vs methylfolate: what's the difference?
They aren't the same thing, and the difference is the whole point.
Folic acid is the synthetic form used in most supplements and fortified foods. It's stable and cheap, but it isn't biologically active. Before your cells can use it, your body has to convert it through several steps into 5-methyltetrahydrofolate (5-MTHF), the form that actually circulates in your blood and does the work.1
Methylfolate (you'll see it as L-methylfolate, 5-MTHF, or (6S)-5-methyltetrahydrofolate) is that active form already. It skips the conversion queue: once absorbed, it's ready to be used.1
For a lot of people, that conversion happens smoothly and folic acid works perfectly well, which is why it has such a strong public-health track record. The complication is that the conversion depends on an enzyme, and not everyone's version of it works at full speed.
The MTHFR variant, and why it matters
The enzyme that carries out the final, rate-limiting step is called MTHFR (methylenetetrahydrofolate reductase). The gene that codes for it comes in common variations, the most studied being C677T. If you've inherited it, your MTHFR enzyme works less efficiently, so you convert folic acid into active folate more slowly.
This isn't rare or exotic. Roughly a third to a half of people carry at least one copy of the C677T variant, and about one in ten of European descent carry two, the reduced-function version, with the frequency varying considerably by ancestry.2 In other words, a meaningful share of women are working with a slower folate-conversion step and have no idea, because it isn't something a standard blood test flags.
Here's where the form on the label earns its keep. In a randomised trial in women, 5-MTHF raised blood folate levels more effectively than folic acid, and it did so regardless of whether the women carried the MTHFR variant or not.3 Because methylfolate is already the active form, it sidesteps the conversion step that the variant slows down. For someone with reduced MTHFR function, that's the difference between a folate your body can use and one it struggles to.
Does everyone need methylfolate?
Honestly, no, and it's worth saying so plainly. If your MTHFR enzyme works normally, folic acid is converted and used effectively, and it remains one of the best-evidenced nutrients in public health. Methylfolate isn't a magic upgrade for everyone.
What it does offer is a form that works well regardless of your MTHFR status, without relying on a conversion step that a large minority of people can't run at full speed. When you can't easily know your own genetics, choosing the form that doesn't depend on them is simply the lower-risk default.
A note on unmetabolised folic acid
There's one more piece often left out. At higher intakes, some folic acid can appear in the blood still unconverted, so-called unmetabolised folic acid.1 The long-term significance of this is still debated, and we won't overstate it. But it's worth knowing that methylfolate doesn't produce it, because there's nothing left to convert. It's another small reason to prefer the active form where you can.
How to read a folate label
You can tell which form you're getting in seconds:
- Active folate: "L-methylfolate," "5-MTHF," "(6S)-5-methyltetrahydrofolate," or a branded methylfolate. This is the form that's ready to use.
- Synthetic folate: "folic acid" or "pteroylmonoglutamic acid." Effective for many, but reliant on conversion.
The same logic applies to the other B vitamins that share these pathways, B12 as methylcobalamin rather than cyanocobalamin, B6 as P-5-P rather than plain pyridoxine. Active forms cost more, which is exactly why cheaper formulas skip them.
How element³ Rise approaches it
We use the active, methylated forms of the B vitamins in Rise, including methylfolate rather than folic acid. The reasoning is the one above: it's the form your body can use whether or not you carry an MTHFR variant, so it doesn't quietly leave a large group of women short.
It's part of a wider principle. We'd rather pay for the forms your body recognises than the cheaper ones it has to work to convert, and we list every form and dose so you can check exactly what you're getting.
Your Questions
What's the difference between folic acid and methylfolate?
Folic acid is a synthetic, inactive form that your body has to convert into active folate (5-MTHF) before it can use it. Methylfolate is that active form already, so it's ready to use once absorbed, without relying on the conversion step.
Is methylfolate better than folic acid?
For people with normal MTHFR function, folic acid works well. Methylfolate's advantage is that it works regardless of your MTHFR status and doesn't depend on a conversion step that a large minority of people run slowly. Since you usually can't know your own genetics, the active form is the lower-risk default.
Do I need to get tested for MTHFR?
Not necessarily. Testing can be interesting, but it isn't required to make a sensible choice: using an active-folate supplement covers you either way, which is simpler than testing and then deciding. If you have a personal or family history that concerns you, discuss it with your GP.
Is folic acid bad for you?
No. Folic acid is safe and effective for most people, and it has prevented a great deal of harm at a population level. The nuance is about efficiency, not danger: some people convert it less efficiently, and methylfolate avoids that issue.
Which folate should women over 35 take?
A supplement using active folate (L-methylfolate or 5-MTHF) is a sensible default, ideally alongside the active forms of B12 and B6, since these nutrients work together. If you're pregnant, planning a pregnancy, or on medication, follow the folate advice from your healthcare provider, whose guidance takes priority.
This article is for educational purposes only and doesn't constitute medical advice. Always consult a qualified healthcare provider before starting any new supplement, particularly if you're pregnant, breastfeeding, or taking prescription medication.
