Mother's Guide — Nutrition & Supplements
Folic acid during pregnancy: Benefits and recommended daily dose
Your clear guide to knowing the exact dose of folic acid your body needs, and when to safely start and stop taking it.

Folic acid during pregnancy and its key benefits for fetal growth
Folic acid is the most important vitamin in early pregnancy, and the UK National Health Service (NHS) recommends taking 400 micrograms daily from before pregnancy until week 12. This supplement protects your baby from serious brain and spine development problems known as neural tube defects, such as spina bifida. This tube forms in the first weeks, often before you even know you are pregnant.
Folic acid is the synthetic form of vitamin B9, which is called folate in natural foods. Your body needs this vitamin to build healthy new cells and support their rapid division during the first weeks of the fetus's life. When you take your daily pill regularly, you give your baby the foundation needed to build a healthy nervous system.
Many women wonder about the benefits of folic acid during pregnancy beyond nerve protection. Folate in your diet and supplements helps form normal red blood cells for both you and your baby. This steady support reduces fatigue caused by vitamin deficiency in the first trimester.
Source: NHS
Folic acid during pregnancy in the first months and the standard dose
The dose of folic acid during the first months of pregnancy is 400 micrograms once every day for most women, according to the NHS. This dose equals 0.4 mg on medicine packs available in pharmacies. You can get it as standalone tablets or within comprehensive prenatal vitamin pills.
Some mothers get confused between the different dose numbers printed on boxes, such as 400 micrograms, 1 mg, or 5 mg. The medical rule is simple and depends on your health history and initial test results. If you have no special risk factors, the standard preventive dose is completely sufficient.
When buying multivitamins made for pregnancy, read the back label carefully. According to the NHS, you must make sure the supplement does not contain vitamin A (retinol), because large amounts of it can harm your baby's development. Choosing a supplement specifically made for pregnant women ensures you only get safe vitamins.
Source: NHS
Folic acid 5 mg during pregnancy and when a doctor prescribes it
A doctor prescribes 5 mg of folic acid daily if there is a higher chance of the baby having neural tube defects, according to the NHS. This high dose is not for all pregnant women and is only taken by prescription after evaluating your health at the clinic. As for how many times a day to take 5 mg folic acid, the medically recommended dose is once daily until the end of week 12 of pregnancy.
Your doctor determines your need for the 5 mg dose based on clear factors related to you or your husband. Consult your doctor as soon as you start planning for pregnancy if any of the following apply to you:
- You or the baby's biological father have a neural tube defect such as spina bifida.
- You or your husband have a family history of neural tube defects.
- You had a previous pregnancy affected by a neural tube defect.
- You have diabetes.
- You take anti-epilepsy medicine or antiretroviral medicine for HIV.
| Dose Type | Daily Amount | Who It Is For (per NHS) | How to Get It |
|---|---|---|---|
| Standard preventive dose | 400 micrograms (0.4 mg) once daily | Most women planning pregnancy and during the first 12 weeks | Available at pharmacies without a prescription |
| Special high dose | 5 mg once daily | Diabetes, epilepsy medicines, or family/previous history of neural tube defects | By prescription under a doctor's supervision |
Source: NHS
When to start taking folic acid during pregnancy and when to stop
Folic acid is taken daily before pregnancy occurs and continues until the end of week 12 of pregnancy, according to NHS recommendations. If you are wondering when to take folic acid if you did not take it before getting pregnant, start as soon as you find out. Do not worry if you were a few weeks late before discovering your pregnancy; what matters is daily consistency from the moment you know.
Many mothers ask when to stop folic acid, and whether to continue it in the fourth or fifth month of pregnancy. For neural tube prevention, the primary benefit is complete by the end of week 12, which is the end of the third month. After this point, your baby no longer needs the extra dose for spine protection because it has already formed.
In many clinics, the doctor recommends continuing a supplement containing folic acid with iron after the third month if your tests show a need for blood support and anemia prevention. Therefore, do not stop taking any supplement prescribed by your doctor in the middle months without checking with them at your routine visit. Your doctor reads your complete blood count and determines what your body needs at each stage.
Source: NHS
When to take folic acid during pregnancy: before or after food
You can take your folic acid tablet at any time of the day, either before or after food, with a glass of water. Doctors do not require an empty stomach to absorb this vitamin, so choose the easiest and most convenient time for your daily routine. Setting a fixed time every day helps you remember the dose and avoid missing it.
If you experience morning sickness in the first months, taking the pill after a light meal or in the evening before bed is gentler on your stomach. To make daily consistency easier without forgetting, follow these simple steps:
- Link taking the pill to a fixed daily habit, such as breakfast or brushing your teeth at night.
- Keep the medicine box in a visible place in front of you, away from moisture and out of children's reach.
- Take the pill with a full glass of plain water instead of tea or coffee.
- If you miss today's pill, take it as soon as you remember, and do not double the dose the next day to make up for a missed one.
Natural food sources alongside the folic acid supplement during pregnancy
The NHS recommends eating foods rich in natural folate alongside your daily folic acid pill, not as a substitute for it. It is very difficult to get the amount needed to protect your baby from food alone, no matter how balanced your diet is. Therefore, the daily tablet remains essential throughout the first 12 weeks.
Adding natural folate to your meals supports your overall health and gives your body fiber and other minerals needed during pregnancy. According to the NHS, you can find folate in a range of everyday foods available in your kitchen:
- Green leafy vegetables such as spinach, molokhia, arugula, and broccoli.
- Well-cooked legumes such as lentils, fava beans, chickpeas, and beans.
- Breakfast cereals fortified with folic acid.
- Fresh fruits, especially oranges and citrus fruits.
Source: NHS
What's common
- You or the baby's biological father have a neural tube defect such as spina bifida.
- You or your husband have a family history of neural tube defects.
- You had a previous pregnancy affected by a neural tube defect.
- You have diabetes.
- You take anti-epilepsy medicine or antiretroviral medicine for HIV.
- Link taking the pill to a fixed daily habit, such as breakfast or brushing your teeth at night.
- Keep the medicine box in a visible place in front of you, away from moisture and out of children's reach.
- Take the pill with a full glass of plain water instead of tea or coffee.
- If you miss today's pill, take it as soon as you remember, and do not double the dose the next day to make up for a missed one.
- Green leafy vegetables such as spinach, molokhia, arugula, and broccoli.
- Well-cooked legumes such as lentils, fava beans, chickpeas, and beans.
- Breakfast cereals fortified with folic acid.
- Fresh fruits, especially oranges and citrus fruits.
When to call a doctor now
Folic acid is very safe, but contact your doctor before starting the standard dose or to adjust it in the following cases (according to the NHS):
- If you have diabetes or take anti-epilepsy medicine, because you need a prescription for the 5 mg dose instead of the standard dose.
- If you or your husband have a personal or family history of neural tube defects such as spina bifida.
- If you have a diagnosed vitamin B12 deficiency, so your doctor can review your supplements and prescribe the right treatment for you.
- If you develop rare allergic symptoms after taking the tablet, such as a skin rash, itching, or shortness of breath.
Have a question about your supplements this week?
Ask Nawal, the smart assistant inside the Nawah app, to answer your daily questions about nutrition and pregnancy in Arabic or English before your next doctor's visit.
Get NawahCommon questions
Is stopping folic acid harmful during the first months of pregnancy?
Yes, stopping folic acid in the first 12 weeks deprives your baby of essential protection against neural tube defects like spina bifida, according to the NHS. If you forget to take the pill for a day or two, there is no need to panic; simply return to taking your daily pill regularly without doubling the dose.
How many times a day do I take 5 mg folic acid during pregnancy?
The 5 mg dose of folic acid is taken only once a day, according to NHS recommendations. Do not take this high dose unless prescribed by your doctor for a medical reason such as diabetes or a family history of neural tube defects.
When should a pregnant woman take folic acid during Ramadan?
If your doctor clears you to fast, you can take your folic acid pill once daily after Iftar or with Suhoor with a glass of water. What matters is keeping the time consistent each night to ensure your body gets the daily dose regularly.
What are the side effects or harms of folic acid during pregnancy?
Folic acid at medically recommended doses is safe and causes no harm to you or your baby. A few women may feel mild stomach upset or nausea, which can be resolved by taking the tablet after a light meal instead of on an empty stomach.
Should I continue taking folic acid in the fourth and fifth months of pregnancy?
The NHS explains that the primary need for folic acid to protect the neural tube ends at week 12 (the end of the third month). However, many doctors in the fourth and fifth months prescribe supplements combining iron and folic acid to prevent anemia, which is safe and helpful if recommended by your doctor.
What is the alternative to folic acid during pregnancy if I cannot tolerate pills?
Food alone cannot replace the folic acid supplement in the first three months, according to the NHS. If you have trouble swallowing tablets or they worsen your nausea, ask your doctor or pharmacist to switch you to smaller tablets, a liquid supplement, or chewables with the same dose.
Is 1 mg of folic acid enough during the first months of pregnancy?
The NHS recommends a dose of 400 micrograms (0.4 mg) daily for a typical pregnancy without risk factors. Therefore, the 1 mg pill available in some pharmacies covers the standard daily requirement, provided you do not have a condition that requires the prescription 5 mg dose.
Sources
- Pregnancy vitamins and supplements - NHSNHS · retrieved 2026-10-31
- Vitamins and supplements in pregnancy - Best Start in Life - NHSNHS · retrieved 2026-10-31
This guide is general information, not medical advice. It does not replace a doctor, and it knows nothing about your particular pregnancy. If something feels wrong, contact your doctor instead of waiting for the next scheduled visit.