Unverified75% confidenceTradeoffTime unknown
剂量越高抗氧化与耐力效果理论上更强，但3000mg/天以上边际收益急剧下降且增加胃肠不适风险；追求性价比与安全性，1000-2000mg是效果与耐受的最佳平衡区间
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Unverified剂量越高单次省事但过量风险与个体差异越大；小剂量（1000IU）每日服用更利于稳态维持，适合长期无检测的保守补充策略79% similarUnverified含量越高见效可能越快但胃肠道副作用（恶心、腹胀）和低血糖风险也越大，建议从100-300mg起始耐受后再上调至600mg，而非直接从大剂量开始79% similarUnverified剂量与耐受性权衡：单份剂量越高（8-10g）补充效率越高，但突然大剂量摄入不可溶纤维易导致腹胀、腹痛、排气，肠胃敏感者宜选可分次的小份包装从低剂量适应79% similarUnverified剂量越高提神越强但副作用风险陡增：超过300mg单次剂量易引发心悸、胃部不适、焦虑和后续的能量崩溃(crash)，日常出行提神100-150mg即可，盲目追求高剂量得不偿失78% similarUnverified剂量越大越有效但耐受性越差：临床有效量常需10-20g/日，而高剂量易引发胀气腹泻，实际应从小剂量爬坡而非一步到位追求足量78% similar
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