1. Obesity: Iced black tea contains a lot of sugar and calories. Regular drinking can lead to weight gain and increase the risk of obesity.
2. Increase the risk of diabetes: Long-term drinking of high-sugar drinks will lead to insulin resistance and increase the risk of diabetes.
3. Damage to teeth: Sugar and acid in iced black tea will corrode teeth, and long-term drinking may lead to tooth decay and bleeding gums.
4. Increase the risk of cardiovascular diseases: The link between high-sugar drinks and cardiovascular diseases has been proved, and long-term drinking may increase the risk of heart disease and stroke.
Therefore, excessive consumption of iced black tea may have adverse effects on health. It is recommended to drink in moderation, choose low-sugar drinks, or drink boiled water directly.