Folic Acid Before Pregnancy
Why folic acid is the most important preconception supplement, how much to take, who needs a higher dose, and which products are available in Singapore.
Why Folic Acid Matters So Much
Folic acid (vitamin B9) is essential for the development of the neural tube - the structure that forms the baby's brain and spinal cord. The neural tube closes by 28 days after conception - often before a woman even knows she is pregnant.
Inadequate folic acid during this critical window increases the risk of neural tube defects (NTDs), including spina bifida and anencephaly. These are serious, often disabling or fatal conditions that are largely preventable.
Taking folic acid before conception and through the first trimester reduces the risk of NTDs by 50-70%. This is why the recommendation is to start before you try to conceive, not after you get a positive test - by then, the neural tube is already closing.
Singapore rates and guidelines
Neural tube defects in Singapore occur in approximately 1-2 per 1,000 live births. KKH, NUH, and HPB all recommend 400mcg folic acid daily for all women planning pregnancy, started at least 1 month before conception and continued through the first 12 weeks of pregnancy.
How Much Folic Acid to Take
| Who | Recommended Dose | When to Start |
|---|---|---|
| Most women | 400 mcg (0.4 mg) daily | At least 1 month before trying; ideally 3 months before |
| Previous NTD-affected pregnancy | 5 mg daily | At least 3 months before trying; prescription required |
| Diabetes (pre-existing) | 5 mg daily | 3 months before; discuss with doctor |
| Epilepsy (on anticonvulsants) | 5 mg daily | Discuss with neurologist - some drugs deplete folate |
| BMI over 30 | 5 mg daily | Higher dose recommended due to absorption differences |
| Family history of NTDs | 5 mg daily | Discuss with GP for prescription |
5mg folic acid requires a prescription in Singapore. Available at polyclinics and private GPs for those who qualify.
Supplements Available in Singapore
Folic acid is available standalone or as part of a comprehensive prenatal multivitamin. Starting a prenatal vitamin before conception is sensible and convenient.
| Product | Folic Acid Content | Approx Cost | Where to Buy |
|---|---|---|---|
| Guardian Folic Acid 400mcg | 400 mcg | $8-12/100 tablets | Guardian |
| Elevit Pronatal | 800 mcg | $35-55/30 tablets | Guardian, Watson, KKH pharmacy |
| Materna | 1,000 mcg | $30-45/30 tablets | Guardian, Watson |
| Obimin AZ | 400 mcg | $20-35/30 tablets | Prescription; KKH, NUH pharmacy |
| NovaMom | 400 mcg | $40-60/30 tablets | Online, some pharmacies |
For most women, a standalone 400mcg folic acid supplement is sufficient and cost-effective. A comprehensive prenatal vitamin is also fine and provides additional nutrients (iron, iodine, vitamin D, DHA) that support pregnancy from the start.
Other Supplements Worth Considering
Vitamin D - check yours first
Despite Singapore's sunshine, vitamin D deficiency is common (indoor jobs, sunscreen use). Deficiency is associated with reduced fertility and pregnancy complications. Get tested ($20-40 at GP), and supplement if below 75 nmol/L.
Iodine 150mcg/day
Iodine is essential for fetal thyroid development and brain development. Most prenatal vitamins include it. If using a standalone folic acid, consider adding an iodine supplement.
DHA (omega-3) 200mg/day
Supports fetal brain and eye development. Can be from fish oil capsules or algae-based DHA (suitable for vegetarians). Begin preconception; safe throughout pregnancy.
Iron - only if deficient
Iron is included in most prenatal vitamins. Do not supplement iron unless tested and found to be deficient - excess iron causes constipation and can be harmful. Test ferritin with your GP.