Vitamins & minerals
Vitamin B9 (Folate)
Names you may see: folic acid methylfolate 5-MTHF L-methylfolate B9
The quick take
Folate is needed for DNA production and cell division. Folic acid is a form used in fortified foods and many supplements.
A closer look
What forms will I see on a label?
Labels may list folic acid or 5-MTHF (methylfolate). Compare the declared folate amount and units.
Why people use it
People use folate supplements to meet nutritional needs, especially around pregnancy. It is included in prenatal and B-complex formulas for its role in normal cell division.
These are common goals and marketing uses. The evidence section below explains what research supports.
What does the evidence tell us?
Adequate folate is especially important around pregnancy. Folic acid has established evidence for reducing neural-tube-defect risk when used as recommended.
What should I know before using it?
High folic-acid intake can conceal signs of vitamin B12 deficiency. Discuss pregnancy planning and relevant medication with a healthcare professional.
Sources & further reading
NIH Office of Dietary Supplements ↗
Content reviewed: September 30, 2026
General educational information. Follow the product label and seek individual advice when needed.