Unverified85% confidenceDecision RuleTime unknown

镁补充应看元素镁含量而非化合物总重，甘氨酸镁/苏糖酸镁吸收好且胃肠刺激小，氧化镁吸收率低（约4%）多用作通便；肾功能不全者补镁需谨慎防高镁血症

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心脏复合营养包category

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Unverified氧化镁（Magnesium Oxide）标称含量高（约60%元素镁）但生物利用度低于4%，主要用于缓解便秘而非补镁；真正补镁应选甘氨酸镁、柠檬酸镁或苏糖酸镁92% similar Unverified含有甘氨酸镁形式的镁，对已在额外补镁的用户需注意总摄入量，避免镁过量引起腹泻91% similar

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