Which teas should not be drunk?
Which teas should not be drunk? Strong tea contains high levels of caffeine and theophylline, which can cause insomnia, headaches, and digestive issues. Old tea may accumulate toxins. Contaminated tea can carry harmful substances like paint or camphor odors. Scorched tea loses nutrients and flavor. Overnight tea, especially if spo...

Tea News · Jun 13, 2026

These Teas Are Harmful to the Human Body
These Teas Are Harmful to the Human Body Certain types of tea can pose health risks and should be consumed with caution. Strong tea contains high levels of caffeine and theophylline, which can cause insomnia, headaches, and gastrointestinal discomfort. Moldy tea harbors significant toxins, while teas contaminated with foreign odors (like p...

Tea News · Mar 05, 2026