The so-called strong tea refers to tea soup in which the consumption of tea leaves exceeds a constant (3-4 grams of a cup of tea). Too strong tea soup is not suitable for many people. If you drink strong tea at night, it is easy to cause insomnia because too much caffeine stimulates nerves; People with tachycardia, heart disease, hypertension, stomachache, constipation, neurasthenia and iron deficiency anemia should not drink strong tea. In particular, green tea is cool, and people with cold stomach will aggravate stomach discomfort by drinking strong tea, so it is advisable to drink moderate black tea. Pregnant women, children and lactating women should not drink strong tea to avoid excessive caffeine stimulation; Drinking strong tea often after meals is harmful to health, because theophylline in tea has a strong diuretic effect, and drinking too much tea will cause frequent urination and affect work and sleep; A large amount of tea polyphenols in tea can solidify protein in food into particles, which makes it difficult for human body to digest and absorb; A large amount of tea polyphenols in strong tea will also cause the human body to lack vitamin B 1, which will make people lose appetite, be nervous and be prone to fatigue. In addition, drinking too much tea can also cause constipation; Drinking strong tea for pregnant women will reduce milk. It is not advisable to drink strong tea on an empty stomach, otherwise it will often cause stomach discomfort, and sometimes even produce discomfort symptoms such as palpitation and nausea, resulting in "tea drunkenness".
However, strong tea is not completely inedible. Strong tea with a certain concentration has the effects of clearing away heat and toxic materials, moistening lung and resolving phlegm, strengthening heart and diuresis, sobering up and promoting digestion. In some cases, drinking strong tea is beneficial: those who get angry and those who smoke and drink too much, strong tea can eliminate calories, detoxify them and help them wake up; After eating chicken, duck, fish and other meat dishes, I often feel greasy and bloated. At this time, if you drink a cup of strong tea, tea contains more caffeine, which can help dissolve fat, thus reducing the burden on the stomach. Patients with coronary heart disease with dysuria, sinus block or complete atrioventricular block can increase their heart rate after drinking strong tea, which has an auxiliary therapeutic effect. For people with oral inflammation and sore throat, drinking strong tea also has anti-inflammatory and bactericidal effects.