The Importance of Vitamin B9 in Pregnancy: Folate and Folic Acid

When it comes to pregnancy, vitamin B9 is essential for supporting your baby’s early development. You may hear the terms folate and folic acid used interchangeably, but there are some differences worth understanding.

Folate vs. Folic Acid

Folate is the natural form of vitamin B9 found in foods such as leafy greens, lentils, and citrus fruits.

Folic acid is the synthetic form found in most supplements and fortified foods. It requires conversion by the body to become active.

Both forms contribute to healthy cell growth and early development, including supporting the formation of your baby’s brain and spinal cord, and helping to reduce the risk of neural tube defects such as spina bifida.

Why Vitamin B9 Matters

Vitamin B9 plays a vital role in pregnancy by:

• Supporting the formation of the baby’s brain and spinal cord
• Reducing the risk of neural tube defects
• Contributing to DNA synthesis and red blood cell production

How Your Body Uses Folic Acid vs. Folate

Folic acid must be converted into its active form (L-methylfolate) through a complex enzyme process. Up to 60% of people have a common genetic variation (MTHFR) that makes this conversion less efficient.

Methylated folate (also called L-5-methyltetrahydrofolate or 5-MTHF) is already in the active form, so it’s more bioavailable and easier for the body to use—especially for those with MTHFR gene variants.

Choosing a Supplement

The most important consideration is making sure you are taking a supplement that provides the recommended daily amount of vitamin B9. The NHS recommends:

• 400 µg daily from before conception until 12 weeks of pregnancy
• A higher dose (usually 5 mg daily) for women at higher risk—your GP or midwife can advise

It’s always wise to check the ingredients on your supplement and discuss your options with your healthcare professional to ensure it meets your needs.

Professor Mark Johnson - Consultant Obstetrician & Founder of Nurture: “When it comes to vitamin B9, occurs naturally in food as folate and folic acid is the synthetic form. Either is good to support your baby’s early development and reduce the risk of neural tube defects.”

Product Labelling

EU law stipulates that even supplements containing folate must legally be labelled as folic acid. This means it’s worth looking beyond the front of the packaging. If a product does include folate, you’ll usually find it specified in the nutrition information panel or ingredients list.

Key Takeaways

• Vitamin B9 is essential for early pregnancy.
• Both folate (from foods) and folic acid (from supplements) support healthy development.
• Supplementation is the most important step to help reduce the risk of neural tube defects.
• Labels may say ‘folic acid’ even if the supplement contains folate—check ingredient lists carefully.
• Unsure which is right for you? Speak with your midwife or GP, or explore Nurture’s expert-formulated supplements designed with your pregnancy in mind.