Core Viewpoint - The article clarifies that claims linking a certain milk tea brand to drug-like properties due to caffeine content are incorrect, emphasizing that caffeine is a naturally occurring substance with established safety standards for consumption [2][17]. Group 1: Caffeine Sources and Content - Caffeine is a natural alkaloid found in tea leaves, with a higher concentration (2%-5%) compared to coffee beans (1%-2%) [3]. - Tea and tea beverages are the primary sources of dietary caffeine for Chinese consumers, contributing 74.80% of caffeine intake for adults, followed by milk tea and coffee [5]. - Common foods containing caffeine include chocolate, carbonated drinks, and energy drinks, with varying caffeine levels [6][7]. Group 2: Caffeine Consumption Guidelines - The safe daily caffeine intake is approximately 400 mg for healthy adults and about 175 mg for individuals under 18 [8]. - For a 60 kg adult, this translates to consuming around 969 grams of liquid coffee or 1524 grams of liquid milk tea daily, without other caffeine sources [9]. Group 3: Health Considerations - Certain populations, such as pregnant women, breastfeeding mothers, and individuals with gastrointestinal issues or heart conditions, should limit caffeine intake due to potential health risks [11]. - Individual sensitivity to caffeine varies significantly, influenced by genetics, age, and health status, necessitating personalized consumption guidelines [12][13]. Group 4: Industry Standards and Consumer Awareness - The caffeine content in milk tea can exceed that of coffee, with some brands reporting caffeine levels between 90 mg to 160 mg per serving [14][16]. - The beverage industry is moving towards better regulation and transparency regarding caffeine content, with initiatives like the "red-yellow-green light" system to indicate caffeine levels [16].

Core Viewpoint - The article clarifies that claims linking a certain milk tea brand to drug-like properties due to caffeine content are incorrect, emphasizing that caffeine is naturally occurring and regulated within safe limits [1][24]. Group 1: Caffeine Sources and Content - Caffeine is a natural alkaloid found in tea leaves, which contain 2%-5% caffeine by dry weight, higher than coffee beans at 1%-2% [3]. - The caffeine content in various teas (per 200-250ml serving) is as follows: black tea: 25-110mg (average 40-50mg), oolong tea: 12-55mg (average 30mg), green tea: 8-30mg (average 20-30mg), and white tea/Pu-erh: about 10-20mg [3]. - Tea and tea beverages are the primary sources of dietary caffeine for consumers in China, contributing 74.80% to adult caffeine intake, followed by milk tea and coffee [6]. Group 2: Health Implications of Caffeine - Moderate caffeine intake can enhance alertness, but excessive consumption may lead to dependence, characterized by withdrawal symptoms such as headaches and fatigue [4]. - The recommended safe caffeine intake is 400mg per day for healthy adults and approximately 175mg for individuals under 18 [12]. - For a 60kg adult, this translates to consuming 969g of liquid coffee or 1524g of liquid milk tea daily without exceeding safe caffeine levels [12]. Group 3: Caffeine in Milk Tea - Some milk tea brands use whole tea leaves instead of tea powder, resulting in caffeine content that can exceed that of coffee; for example, a 470ml serving can contain 90-160mg of caffeine [21]. - A typical latte contains about 100mg of caffeine, while an Americano has around 150mg, indicating that milk tea can sometimes deliver higher caffeine levels than these coffee drinks [23]. Group 4: Consumer Awareness and Regulation - The beverage industry is moving towards better transparency regarding caffeine content, with some brands adopting a "red-yellow-green light" system to indicate caffeine levels [21]. - The Chinese Tea Association plans to release standards for tea beverages, which will help consumers make informed choices about caffeine intake [21].