I suggest buckwheat tea. Kuding tea has a strong antihypertensive effect. If you drink too much, it may lead to low blood pressure and dizziness, which is very helpful to people with high blood pressure, but it is harmful to normal people.

Tartary buckwheat tea is a kind of pure grain tea, which tastes a little bitter buckwheat. Its taste is not bitter, and it has the functions of calming cold, invigorating qi, nourishing spirit, benefiting eyes and ears, lowering qi, relaxing intestines and strengthening stomach. Buckwheat flour and its products have the functions of lowering blood sugar, lowering blood lipid and enhancing human immunity, and have adjuvant therapeutic effects on patients with diabetes, hypertension, hyperlipidemia, coronary heart disease and stroke. In view of the scarcity of nutrients in tartary buckwheat, in order to make the nutrients better absorbed by human body, Anxi enterprises applied for the national invention patent of tartary buckwheat tea technology in 2002 after years of research.

Ilex kudingcha originated from the leaves of Ilex macrophylla of Ilex. Its finished tea is fragrant and bitter, and then sweet and cold. It has many functions, such as clearing away heat, relieving summer heat, improving eyesight and intelligence, promoting fluid production to quench thirst, promoting diuresis, moistening throat and relieving cough, lowering blood pressure and losing weight, inhibiting and preventing cancer, resisting aging and promoting blood circulation.