Unverified78% confidenceDecision RuleTime unknown
食盐净重规格选择应考虑消耗速度:三口之家月均用盐约300-500g,一次囤积超过1年用量意义不大,加碘盐存放过久碘含量会缓慢下降
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78%
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Long-term
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Unverified三口之家日常食盐建议按每人每日≤5g(WHO推荐)估算,500g装约可用1-2个月,避免囤大规格1kg装长期敞口存放——盐受潮结块虽不影响安全但会导致加碘盐碘含量下降90% similarUnverified盐无保质期但加碘盐的碘会随时间缓慢损失,家庭建议按用量买300-500g小规格,开封后半年内用完以保证碘有效86% similarUnverified软化盐耗量与去除的硬度和用水量成正比,经验值约为每去除1度硬度每吨水耗盐15-18g;三口之家每月耗盐约5-10kg,需选用专用软化盐(高纯度氯化钠),不可用普通食盐(含碘及杂质会污染树脂)86% similarUnverified含盐量越低(如低盐味噌6-8%)越健康但保质期短、需冷藏且易变色氧化;传统赤味噌含盐11%以上耐储存但钠摄入高。控盐人群选减盐款需在开封后1个月内用完85% similarUnverified选购标注钠含量的产品,每100g钠≥1500mg属高盐重口,长期佐餐或给控盐人群食用应选钠≤800mg/100g的低盐款83% similar
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