Should I take Vitamin B9 (folate / methylfolate)?

This is not personalized medical advice. Our file highlights plausible help contexts (Pregnancy neural tube defect risk reduction Homocysteine context) and caution contexts (Anyone replacing prescribed therapy without medical supervision Undiagnosed severe symptoms (chest pain, GI bleeding, sudden neurologic changes)). RDA 400 mcg DFE/day; pregnancy often 600 mcg DFE from diet+supplement per public-health guidance. (typical supplement-label context, not individualized dosing).