一杯或让人睁眼到天亮 很多人不知道还天天喝

Core Viewpoint - The increasing popularity of milk tea among young people raises concerns about its caffeine content, which can be higher than that of coffee, potentially leading to insomnia [1][2]. Group 1: Caffeine Content in Milk Tea - A study by the Shanghai Consumer Council in 2017 found that the average caffeine content in milk tea was 270mg per cup, with the highest recorded at 480mg, equivalent to four cups of coffee or eight cans of Red Bull [3]. - In 2019, a survey in Shenzhen revealed that all tested milk tea brands contained caffeine, with an average concentration of 258mg/kg and a maximum of 522mg/kg [3]. - The caffeine content in milk tea is primarily due to the tea component, which contains about 20-40mg of caffeine per gram of tea leaves, and many commercial milk teas use concentrated tea powder, resulting in higher caffeine levels [5]. Group 2: Effects of Caffeine on Sleep - Many individuals report that consuming just one cup of milk tea can lead to sleeplessness, with some remaining awake all night [6]. - The stimulating effects of caffeine vary among individuals due to genetic factors that influence caffeine metabolism, with some people metabolizing caffeine quickly while others do so slowly, leading to prolonged effects [8]. Group 3: Safety of Caffeine Consumption - Health organizations such as the FDA and EFSA consider a daily caffeine intake of up to 400mg safe for healthy adults [9]. - For adults, consuming up to 1524g of liquid milk tea daily, without other caffeine sources, is deemed safe, although adolescents and pregnant women are advised to limit their caffeine intake [9]. - Individuals sensitive to caffeine may experience adverse effects such as insomnia and should consider avoiding milk tea [10]. Group 4: Health Concerns Related to Milk Tea - The primary health issues associated with milk tea are its high sugar and fat content, with fat levels reaching 40-70 grams and sugar content between 30-60 grams per cup [10]. - It is essential to monitor milk tea consumption to avoid weight gain [11].