Unverified80% confidenceFactTime unknown
绿茶/红茶基底能量茶每袋咖啡因约20-40mg，马黛茶约30-50mg，瓜拉纳提取物可达80-120mg（接近一杯咖啡）；日饮不超过3杯以控制总咖啡因＜300mg
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Unverified长途驾驶想提神应选含咖啡因茶饮，绿茶/红茶咖啡因含量约10-20mg/100ml，一瓶500ml约50-100mg，相当于半杯咖啡，能维持1-2小时清醒84% similarUnverified提神效果看咖啡因绝对量而非咖啡浓度：一杯挂耳(10g豆)约含60-120mg咖啡因，冻干黑咖(2g)约50-90mg，速溶三合一(15g)仅30-50mg，需重度提神应选挂耳或双份冻干81% similarUnverified每罐250ml含约80mg咖啡因，提神效果相当于一小杯咖啡，若日常已有大量咖啡摄入，需合并计算总咖啡因量，避免超出每日推荐上限（约400mg）。81% similarUnverified常见速溶黑咖每袋（约2g冻干粉）咖啡因含量通常在50-90mg，三合一速溶因粉量大反而可达60-100mg；抹茶粉每克含咖啡因约30mg，一袋约2g含60mg79% similarUnverified宣称'燃脂'的绿茶素饮品，有效EGCG单日需达300-400mg才具备文献支持的代谢促进效果，多数市售即饮茶饮EGCG含量不标注或＜50mg，实际效果有限79% similar
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