Everyone knows that drinking black tea has many benefits and advantages. But do you know what the side effects of drinking black tea are? If you want to know, come in and learn about the side effects of black tea.

Side Effects of Black Tea

1. Strong black tea dilutes gastric juices, preventing normal digestion

A person normally secretes 1.5-2.5 liters of gastric juice per day. This gastric juice can properly digest the food consumed daily. When large amounts of strong black tea are consumed, it dilutes the gastric juice, lowering its concentration and preventing normal digestion of food, leading to symptoms such as indigestion, bloating, and abdominal pain. In some cases, it may even cause duodenal ulcers.

2. Black tea hinders the absorption of iron

Tea contains tannic acid. Black tea contains about 5%, while green tea contains about 10%. When large amounts of strong tea are consumed, the combination of tannic acid and iron becomes more active, hindering and affecting the absorption of iron, leading to iron deficiency anemia.

3. Drinking strong black tea can easily cause constipation

The tannic acid in black tea can not only combine with iron but also combine with protein in food to form a lumpy, indigestible tannic acid protein, causing constipation. For elderly people who already suffer from constipation, this can worsen the condition.

4. Strong black tea can cause increased blood pressure and heart failure

The caffeine in strong black tea can accelerate the heartbeat, thereby increasing blood pressure. At the same time, large amounts of strong tea entering the blood vessels can increase the burden on the heart, causing symptoms such as chest tightness and palpitations, and worsening the degree of heart failure.

Although black tea has many benefits and effects, it also has its side effects. Friends who enjoy drinking black tea should pay attention to this.