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叶酸（B9）应优先选择活性形式5-MTHF（左旋甲基叶酸），而非合成叶酸（folic acid），因约30-40%人群携带MTHFR基因变异导致合成叶酸转化能力下降，无法有效利用

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Unverified叶酸形式优选甲基四氢叶酸(5-MTHF)而非合成叶酸(folic acid)，约30-40%人群携带MTHFR基因变异，对合成叶酸转化效率低92% similar Unverified叶酸形式优先选「甲基四氢叶酸（5-MTHF）」而非「叶酸（folic acid）」，因约30-40%人群携带MTHFR基因变异，对合成叶酸转化利用率低91% similar Unverified叶酸形式优先选活性的5-甲基四氢叶酸（5-MTHF）而非合成叶酸（folic acid），约30%-40%人群存在MTHFR基因突变导致合成叶酸转化率低91% similar Unverified叶酸选择甲基化形式（5-MTHF/L-甲基叶酸）而非合成叶酸（folic acid），约30-40%人群携带MTHFR基因突变无法有效转化合成叶酸，甲基叶酸生物利用率更高91% similar Unverified叶酸形式选甲基四氢叶酸(5-MTHF)优于普通叶酸(folic acid)，约30-40%人群携带MTHFR基因突变无法有效转化普通叶酸，甲基化形式可直接吸收90% similar

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