Experts say that if tea is kept at room temperature for many hours, bacteria from the environment can invade and multiply, while antioxidant compounds such as polyphenols and vitamin C are also gradually oxidized, causing the quality of drinks to decline.
However, instead of drinking, overnight tea can still be used for some other purposes.
Mouthwash helps with oral hygiene
Studies show that polyphenols in tea have the ability to inhibit the growth of Streptococcus mutans bacteria, the main cause of tooth decay and plaque.
Natural deodorant
Polyphenols in tea can reduce volatile sulfur compounds produced by bacteria, thereby helping to reduce odors on hands or in some household items.
Cleaning utensils
The tannin content in tea helps remove some mild stains and create shine for glass or wooden surfaces when used as a natural cleaning solution.
Watering plants
Some gardeners take advantage of unsweetened cold tea to supplement organic matter, but need to use it sparingly to avoid changing soil pH.
Experts still recommend not drinking tea that has been left overnight, especially when stored at room temperature for many hours. If you want to enjoy tea safely, you should mix enough or store it in the refrigerator and use it for a short time to limit the risk of infection and ensure the best flavor.
