Folic acid is always prescribed by gynae in the 1st trimester. You actually don't need anything else during that stage. Folic acid is much more important for your baby to reduce serious risk of neural tube defects. Always, always best to seek your gynae's advice first to top up more supplements. Also remember, too much of everything may also not be good. This is why your health is always assess first before gynae prescribe you with anything.
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