Is there a monopoly on black bitter buckwheat tea in the street? It is said that drinking black tartary buckwheat is good for blood vessels and helps to reduce the three highs. Is it true?/You don't say. It's true, bioflavonoids: the main component is rutin, also known as vitamin P, and its main functions are: softening blood vessels, improving microcirculation, clearing away heat and toxic materials, promoting blood circulation and removing blood stasis, removing toxic materials and promoting granulation, lowering blood sugar, urine sugar, reducing blood fat, invigorating qi and refreshing, and strengthening insulin periphery. Rutin can hardly be found in other grains, and Hangfei also has tartary buckwheat tea. I bought it for my family and thought it was ok. You can learn about it.