caffeine content
tight tea is often rich in caffeine, which can stimulate the central nervous system and cardiovascular system, increasing blood pressure.
Therefore, patients with high blood pressure should be cautious when using black tea in their diet. When choosing tea to drink, limit your caffeine intake. Choose tea with low caffeine content or no caffeine instead of black tea.
Each person reacts differently to caffeine. If you experience a significant increase in blood pressure or other unpleasant symptoms after drinking tea, you should inform your doctor and adjust your diet.
Green tea and white tea have lower caffeine content, but people with high blood pressure should still use them cautiously.
Polyphenol
Polyphenols in tea, one of the main ingredients of tea, have a vasoconstriction effect, which can lead to high blood pressure.
oxalic acid content
The oxalic acid content in black tea is relatively high. oxalic acid can combine with calcium ions to form calcium oxalate residue, which can have a negative impact on cardiovascular health in the long run.
