Excessive consumption of tea can cause nervousness, increased heart rate or facial flushing. Tannins contained in the drink can interfere with the iron in the foods consumed and thus limit its absorption by the body.
“Consuming hot drinks over 65 degrees can increase the risk of esophageal cancer,” warns Bernard Srour, researcher at Inrae. Theanine, a molecule naturally present in tea, acts on mood. It increases serotonin and dopamine (the so-called hormones of happiness and immediate pleasure)