Folic Acid: What are the Benefits and What Types Are There?
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Leesduur: 11 min
The importance of taking folic acid and its derivatives, such as folate and 5-MTHF, is becoming increasingly well-known. Taking easily absorbable folate and/or 5-MTHF is especially important during pregnancy.
But what exactly is folic acid and what does it do in the body? In this article, we'll explain everything about folic acid and how to get it through food.
Folic acid (vitamin B11) is essential for cell formation, DNA production and prevents neural tube defects in unborn babies during pregnancy.
Folic acid occurs as synthetic folic acid, natural folate, and biologically active 5-MTHF, of which 5-MTHF is directly absorbable.
Deficiency causes anemia, neurological problems, and fatigue; too much synthetic folic acid can mask vitamin B12 deficiencies.
Folic acid, also known as vitamin B11 (or B9 in some countries), is a water-soluble B vitamin. It is the synthetic form of folate, which occurs naturally in foods.
This vitamin plays a crucial role in the formation of cells and DNA and is therefore important for the early development of the unborn child (during pregnancy).
The importance of folic acid is best known for its role during (and before) pregnancy. But it plays a role in many more bodily functions!
This is why it's good for everyone to get enough folic acid:
During pregnancy, folic acid contributes to:
In addition, it supports:
And plays a role in:
Folic acid is also good for:
Folic acid, folate, and 5-MTHF folate (Quatrefolic) are terms often used to refer to different forms of folic acid.
Many people think that these are different names for folic acid, but that is not the case.
Here I will explain to you in simple terms what the differences and similarities are:
Folic acid
Folate
5-MTHF folate (Quatrefolic®)
In summary: Folic acid is the synthetic form and must be converted into 5-MTHF to be biologically active. Folates are natural and can be directly converted into 5-MTHF after ingestion. And 5-MTHF itself is immediately biologically active without further conversion.
The Health Council states that as an adult you need 300 mcg of folic acid daily .
For women who are pregnant or trying to become pregnant, this recommendation is much higher. Children also have different needs.
These are the recommended daily amounts of folic acid:
Age |
Recommended Daily Amount of Folic Acid |
| Babies (6-11 months) |
60 mcg |
Children (1-3 years) |
85 mcg |
Children (4-8 years) |
150 mcg |
Children (9-13 years) |
225 mcg |
Children (14-17 years) |
300 mcg |
Adults (18 years and older) |
300 mcg |
Pregnant women |
400 mcg (+400 mcg extra from the time you want to become pregnant until 10 weeks of pregnancy) |
Women who are breastfeeding |
400 mcg |
Source: Nutrition Center (2)
Because folic acid is essential for the development of the unborn baby, a deficiency can cause serious birth defects.(11) Preventing a deficiency is therefore especially important during the first period of pregnancy and even before that!
If a deficiency of the body's own folic acid occurs during the initial phase of pregnancy, the baby has an increased risk of neural tube defects(2)(3), such as:
But a folic acid deficiency can also have consequences for adults.
These are possible symptoms of a deficiency:
Note: I'd like to clarify that taking a folic acid supplement isn't a medication to prevent the above symptoms and conditions. It only helps maintain healthy folic acid levels in your body. Healthy folic acid levels are beneficial for pregnancy, among other things.
Possible causes of folic acid deficiency include(1):
These tips can help you get low folic acid levels back on track:
In addition, there are many other foods that contain sufficient folic acid. That's why I've compiled a list of foods for you.
I eat these foods regularly to get enough folic acid/folate from natural sources:
Mnemonic: The word "folium" is Latin for "leaf," so you can easily remember that folate is mainly found in green leafy vegetables!
| Food |
Amount of Folic Acid per 100 grams |
Swiss chard |
165 mcg |
Broad beans (cooked) |
150 mcg |
Spinach |
131 mcg |
Spirulina |
94 mcg (5) |
Brussels sprouts (cooked) |
95 mcg |
Asparagus (green, cooked) |
70 mcg |
Radish |
38 mcg |
Lentils (brown and green, cooked) |
33 mcg |
| Peas (cooked) |
33 mcg |
Oranges |
25 mcg |
Avocado |
22 mcg |
Banana |
9 mcg |
Source: Nevo table online, 2023
My day always starts with a smoothie. I alternate between them, but my favorite remains this green one. It gives me enough energy for the whole morning and contains a good dose of folic acid.
This is what you need:
Simply mix all the ingredients in your blender and your smoothie is ready!
Can you get too much folic acid?
Yes, that's possible. The dangers of too much folic acid are primarily related to synthetic folic acid. You don't need to worry about natural forms of folate and 5-MTHF from food.
The European Food Safety Authority (EFSA) has therefore set an upper limit. Based on their research, this limit for adults has been set at 1000 mcg per day. (6)
If you take too much folic acid (the synthetic form), your body may not be able to properly convert it into the usable (active) form. This can cause the "unprocessed" folic acid to build up in your body, which can lead to the following possible consequences:
Proven:
Other possible effects (Note: more research needed):
Only if you take too much folic acid as supplementation do you run the risk of having too much folic acid.
You don't have to worry about getting too much through food.
Do you have too much folic acid in your blood? Stop taking folic acid tablets or reduce your intake.
Here you will find a complete guide on what to do when your folic acid is too high .
As I explained to you earlier, folic acid is essential for women who want to become pregnant and during pregnancy.
Are you trying to get pregnant, or are you already pregnant? You can start by trying to eat more folate-rich foods. These contain the most biologically active form of folate, 5-MTHF. Your body absorbs this form best and uses it directly (i.e., without conversion).
You can also take this easily absorbed form of folic acid as a supplement. Doctors often recommend taking extra folic acid because it's generally difficult to meet the RDA established by the Health Council for pregnant women.
This is why it's important to get enough folic acid before you get pregnant and during your pregnancy:
Increasing folate status
Taking folic acid supplements increases the mother's folate status.
Low maternal folate status is a risk factor for the development of neural tube defects in the developing fetus.(2)(11)
Neural tube defects refer to abnormalities that occur during the development of the neural tube, from which the central nervous system forms
Helps reduce the risk of Neural Tube Defects* (= permitted claim at 400 mcg/dose)
Contributions to the Formation of the Placenta
Folate contributes to the formation of the placenta, the organ responsible for the exchange of nutrients and waste products between mother and fetus during pregnancy.
Supporting Fetal Growth
Folate contributes to the growth and development of the foetus during pregnancy.
Here you will find the very best folic acid for pregnancy.
The best form of folic acid is 5-MTHF because it's the most active form. This means your body can use it immediately, without having to convert it first. You can also think of it as the final product into which all other types of folic acid are ultimately converted.
Looking for a folic acid supplement? Choose one with 5-MTHF. This will help your body the most, as it doesn't require energy for the conversion!
Where can you find easily absorbable 5-MTHF in supplements?
Our products contain:
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(2) Nutrition Center. (n.d.). Folic acid (vitamin B11) . https://www.voedingscentrum.nl/encyclopedie/foliumzuur
(3) Wondemagegn, A.T., & Afework, M. (2022). The association between folic acid supplementation and congenital heart defects: Systematic review and meta-analysis. SAGE Open Medicine , 10 , 205031212210810. https://doi.org/10.1177/20503121221081069
(4) Reynolds, E. (2014). The neurology of folic acid deficiency. In Handbook of clinical neurology (pp. 927–943). https://doi.org/10.1016/b978-0-7020-4087-0.00061-9
(5) FoodData Central . (nd). https://fdc.nal.usda.gov/fdc-app.html#/food-details/170495/nutrients
(6) European Food Safety Authority. (2023, November 13). Scientific opinion on the tolerable upper intake level for folate . https://www.efsa.europa.eu/en/efsajournal/pub/8353
(7) Office of Dietary Supplements - Folate . (nd). https://ods.od.nih.gov/factsheets/Folate-HealthProfessional/#en85
(8) JGC van Amsterdam, EHJM Jansen and A. Opperhuizen (2004). Neurotoxicity of folic acid. RIVM report 340230001/2004 https://www.rivm.nl/bibliotheek/rapporten/340230001.pdf
(9) Valera-Gran, D., Navarrete-Muñoz, EM, De La Hera, MG, Fernández-Somoano, A., Tardón, A., Ibarluzea, J., Balluerka, N., Murcia, M., González-Safont, L., Romaguera, D., Julvez, J., & Vioque, J. (2017). Effect of maternal high dosages of folic acid supplements on neurocognitive development in children at 4–5 y of age: the prospective birth cohort Infancia y Medio Ambiente (INMA) study. The American Journal Of Clinical Nutrition , 106 (3), 878–887. https://doi.org/10.3945/ajcn.117.152769
(10) Krishnaveni, G. V., Veena, SR, Karat, S. C., Yajnik, C. S., & Fall, C. H. D. (2013). Association between maternal folate concentrations during pregnancy and insulin resistance in Indian children. Diabetologia , 57 (1), 110–121. https://doi.org/10.1007/s00125-013-3086-7
(11) Van Beynum, IM, Kapusta, L., Bakker, MK, Heijer, MD, Blom, HJ, & De Walle, HE (2009). Protective effect of periconceptional folic acid supplements on the risk of congenital heart defects: a registry-based case-control study in the northern Netherlands. European Heart Journal , 31 (4), 464–471. https://doi.org/10.1093/eurheartj/ehp479
(12) Copp, A. J., & Greene, N. D. E. (2012). Neural tube defects—disorders of neurulation and related embryonic processes. Wiley Interdisciplinary Reviews. Developmental Biology , 2 (2), 213–227. https://doi.org/10.1002/wdev.71