Folic acid (the synthetic form of vitamin B9) is often recommended as a supplement, especially for women planning a pregnancy or who are pregnant. At the same time, it's natural to wonder: can you take too much folic acid? The answer is that it is possible to have an excessive intake, typically through supplements, and therefore it makes sense to keep track of the dose, duration, and your specific situation.

The most practical starting point is always the official recommendations. In Denmark, folic acid is typically recommended for women who wish to become pregnant, as well as in early pregnancy. The recommendation is often 400 micrograms (µg) daily during the period around conception and the first weeks of pregnancy. Some individuals may receive a different dose after consulting a doctor, for example, due to specific risk factors.

If you take a multivitamin or prenatal vitamin, folic acid may already be included. Therefore, it might be relevant to calculate your total intake from multiple supplements on the same day to avoid double-dosing.

Read "folic acid" or "folate" on the label and add up the µg from all supplements you take regularly. If you are in doubt, take the list to your doctor or pharmacist.

It can be difficult to "feel" too much folic acid, as a high intake doesn't necessarily cause obvious symptoms. The most commonly discussed concern in health information is that high doses of folic acid can mask signs of vitamin B12 deficiency (e.g., in blood tests), which can delay relevant diagnosis and treatment. Therefore, it is particularly important to be aware if you are in a group with an increased risk of B12 deficiency (for example, due to certain dietary patterns or gastrointestinal problems) while also taking high doses of folic acid.

If you experience new or persistent symptoms, or if you are taking high-dose supplements, you should discuss it with a healthcare professional instead of making blind adjustments yourself.

Folic acid in the correct dose before and in early pregnancy is used to support the normal development of the fetus. The pitfall typically arises when combining several supplements, for example, a multivitamin, a "pregnancy supplement," and an additional folic acid product.

Practical advice: As a general rule, choose one well-formulated supplement that matches your life stage, and avoid adding extra folic acid without a professional reason. If you have previously had a pregnancy with a neural tube defect, or if your doctor has recommended a higher dose, you should follow the individual plan you have been given.

Folate is found naturally in food, e.g., green leafy vegetables, legumes, and whole grains. Folic acid is the form typically used in supplements. The question "can you take too much folic acid" usually refers to supplements, not ordinary food, because supplements can provide a much higher and more concentrated intake than food alone.

Aim for a folate-rich diet and only use supplements in the dose recommended for you, especially during periods when the need is particular.

You can go a long way with three simple steps:

1. Avoid taking several different vitamin products "just in case."
2. Check the content per daily dose, not just per tablet.
3. Ask your doctor or pharmacist if you have an illness, are taking medication, or are already taking high-dose supplements.

If you are pregnant or a new mother, it can also be good to focus on practical support in everyday life so that you don't end up "compensating" with unnecessary supplements. For comfort and support throughout pregnancy and breastfeeding, you can, for example, see the Pregnancy collection. For the postpartum period, a comprehensive package can be a simple solution, such as the New Mum Care Pack, which is designed for the period after birth.

Sources (for further reading):

• Sundhed.dk (Patienthåndbogen): Folic acid and pregnancy
• Sundhedsstyrelsen: Fact sheet on folic acid (recommendations and practical use)
• NIH Office of Dietary Supplements: Folate fact sheet (background on folate/folic acid and upper intake)