L-Methylfolate vs Folic Acid: What Is the Difference?
Many vitamin labels in Pakistan now say “L-methylfolate” instead of the familiar “folic acid”. Both are forms of the same B-vitamin, folate (vitamin B9), but they are not identical. This guide explains the difference in simple words.
Folate, folic acid and L-methylfolate
- Folate is the B-vitamin found naturally in foods such as leafy green vegetables, beans, peas and some fruits.
- Folic acid is a man-made form of folate. It is used in most supplements and in fortified foods.
- L-methylfolate (also written 5-MTHF or methylfolate) is the active form of folate that the body uses. Some supplements contain it instead of folic acid.
Folic acid has to be converted by the body, in several steps, into the active form. L-methylfolate is already in that active form.
Why do some people choose L-methylfolate?
Some people carry a common variation in a gene called MTHFR (C677T), which makes this conversion less efficient. According to the US National Institutes of Health (NIH), methylfolate may be useful for people with this variant. Whether you need it is something your doctor can advise on.
How much folate is needed?
Folate is measured in mcg DFE (dietary folate equivalents), because the body absorbs folic acid from supplements better than folate from food. For example, 240 mcg of folic acid and 400 mcg of food folate both count as 400 mcg DFE.
| Life stage | Daily amount |
|---|---|
| Adults 19 years and above | 400 mcg DFE |
| Pregnancy | 600 mcg DFE |
| Breastfeeding | 500 mcg DFE |
The NIH sets an upper limit of 1,000 mcg a day for adults from supplements and fortified foods, unless a doctor advises otherwise.
Important: large amounts of folate supplements can hide a vitamin B12 deficiency. They may correct the anaemia that low B12 causes, but not the nerve damage. This is one reason folate and B12 are often checked, or given, together. Ask your doctor before taking high doses.
Folic acid or L-methylfolate: quick comparison
| Folic acid | L-methylfolate | |
|---|---|---|
| Form | Man-made, needs conversion | Active form, ready to use |
| Where you see it | Most supplements, fortified flour and cereals | Some newer supplements |
| On the label | “Folic acid” | “L-methylfolate”, “5-MTHF”, “methylfolate calcium” |
Reading a folate label
- Check the form: folic acid or L-methylfolate.
- Check the amount: in mcg or mg (1 mg = 1,000 mcg).
- Check what else is inside: some products combine folate with vitamin B6 and B12.
L-methylfolate products at Medlife Healthcare
- Megafol Tablet: L-methylfolate 1,000 mcg, 30 tablets.
- Ethix Tablet: L-methylfolate calcium with vitamin B6 (P5P) and vitamin B12 (methylcobalamin), 30 tablets.
- Neurofol Tablet: L-methylfolate 600 mcg, 30 tablets.
Frequently asked questions
Is L-methylfolate the same as folic acid?
Both are forms of folate (vitamin B9). Folic acid is converted by the body into the active form; L-methylfolate already is the active form.
Is 1 mg the same as 1,000 mcg?
Yes. 1 mg = 1,000 mcg.
Should I switch from folic acid to L-methylfolate?
Do not switch, start or stop any supplement, especially during pregnancy, without asking your doctor.
This article is for general information only. It does not diagnose, treat or prevent any condition. Always consult your doctor or pharmacist before starting any supplement.
Source: NIH Office of Dietary Supplements, Folate Fact Sheet for Consumers
