[KongchangAI]
Unverified82% confidenceDecision RuleTime unknown

预防性补充选每日剂量25-100mcg即可;缺乏纠正或神经症状(手脚麻木、贫血)需1000mcg级别;口服高剂量(1000mcg以上)可通过被动扩散绕过内因子吸收障碍,因此恶性贫血或胃切除者选1000mcg口服而非担心'剂量过高'

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82%
Confidence
Long-term
Relevance
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get_claim(id=159479)