[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

纯素食者/严格素食者建议每日500-1000mcg氰钴胺或甲钴胺,或每周补充2000mcg一次;由于口服B12吸收率随剂量升高而下降(内因子饱和),大剂量间歇补充可维持血清水平,无需追求每日高频

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