Many people like to drink strong tea to refresh themselves. Is this good? Experts say that drinking strong tea has many disadvantages for the body and should be avoided as much as possible.

First, strong tea affects the heart.

According to analysis, tea leaves contain 2% to 5% caffeine, and strong tea has an even higher caffeine content. A cup of strong tea contains about 100 milligrams of caffeine. Excessive caffeine can overstimulate the nervous system, leading to insomnia. It can also cause a rapid heartbeat, which is harmful for patients with coronary heart disease who suffer from tachycardia, premature beats, or atrial fibrillation.

Second, strong tea is harmful to the stomach.

The high concentration of caffeine and theophylline in strong tea increases the excitability of the central nervous system, which can accelerate stomach motility, enhance the secretion of gastric parietal cells, increase stomach acid, and intensify irritation to the gastric mucosa, potentially leading to gastric ulcers.

Third, strong tea affects nutrient absorption.

Strong tea also contains a high amount of tannic acid, which can bind with proteins, vitamin B1, and iron ions in food, preventing these nutrients from being properly absorbed. This can lead to deficiencies and related symptoms such as anemia and constipation.

Fourth, drinking strong tea regularly during menstruation, pregnancy, childbirth, and lactation is harmful for women.

During menstruation, excessive blood loss makes it difficult to absorb iron when drinking strong tea, which can lead to anemia. The stimulation from caffeine can also cause menstrual pain and prolong the menstrual period. Pregnant women who drink strong tea are not only prone to anemia but also have difficulty absorbing other nutrients. The stimulation from caffeine can accelerate heart rate, increase urination, and burden the heart and kidneys. Caffeine not only affects the fetus's nutrient absorption but also increases fetal movements, potentially leading to poor fetal development or even congenital issues, harming both the mother and the fetus. Drinking strong tea during childbirth can cause excessive excitement, affecting rest and leading to exhaustion during delivery, weak uterine contractions, and difficult labor. During lactation, caffeine can pass through breast milk and stimulate the baby, causing restlessness and affecting the child's growth and development. Additionally, tannic acid can inhibit milk secretion, interfering with breastfeeding.