Menstruation: Menstrual blood contains relatively high hemoglobin, plasma protein and hemoglobin, so women will lose a lot of iron after menstruation and should be supplemented with more iron. Tea contains more than 30% tannic acid, which is easy to combine with iron ions in the intestine, resulting in precipitation, which hinders the absorption of iron ions by intestinal mucosa.
Pregnancy: Tea is rich in caffeine. Drinking tea will accelerate the heart rate of pregnant women, increase the renal blood flow, increase the burden of pregnant women's heart and kidney, which is not conducive to the healthy development of the fetus.
Keep in mind the taboos when drinking tea healthily:
1, avoid drinking tea if you have a fever.
Caffeine in tea can not only raise the body temperature, but also reduce the efficacy.
2, patients with liver disease avoid drinking tea.
Most substances such as caffeine in tea are metabolized by the liver. If the liver is sick, drinking too much tea exceeds the metabolic capacity of the liver, which will damage the liver tissue.
3, neurasthenia, be careful with tea.
Caffeine in tea can excite the nerve center. Drinking strong tea for neurasthenia, especially in the afternoon and evening, will cause insomnia and aggravate the condition. You can drink tea once in the morning and once in the afternoon during the day. It is better to drink scented tea in the morning, green tea in the afternoon and no tea at night. In this way, patients will be refreshed during the day, calm and comfortable at night, and can fall asleep early.
Refer to the above content: People's Daily Online-Improper drinking of tea is harmful to health. Remember the six taboos of drinking tea, People's Daily Online-Attention of Women! Don't drink tea at these special times.