Unverified83% confidenceSolutionTime unknown
备孕/孕期补充方案：孕前3个月开始→选择400-800μg叶酸(单一或含B12/B6复合)→优先药准字叶酸片保证剂量→日常保健可用软糖但需核算总摄入不超1000μg→孕中期后遵医嘱转复合维生素
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83%
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Long-term
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Unverified备孕选购路径：孕前至少3个月开始每日400μg→无高危史选普通叶酸单方或含叶酸孕期复合维生素→有MTHFR变异/流产史/糖尿病/肥胖者咨询医生升级活性叶酸或提高剂量→孕12周后可继续或转为含叶酸综合营养87% similarUnverified标准补充路径：计划怀孕前至少3个月开始服用0.4mg叶酸→持续至孕早期（12周）→有基因检测提示MTHFR突变则换活性叶酸→孕中晚期视情况转复合配方（叶酸+铁+B12）85% similarUnverified备孕补充路径：无高危因素→400-800μg普通叶酸或含叶酸复合维生素；有神经管缺陷生育史→医生指导下4mg高剂量；MTHFR变异或反复不明原因流产→活性5-MTHF；同型半胱氨酸高→叶酸+B6+B12组合84% similar
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