About 1 hour. ?

Grapefruit tastes sweet and sour, and is cold in nature. It has the effects of regulating qi and reducing phlegm, moistening the lungs and clearing the intestines, nourishing blood and strengthening the spleen. It can also smooth the flow of air, remove oil and relieve greasiness, and clear fire. However, the taste of grapefruit peel is sour. Bitter, it needs to be boiled for a long time to reduce its bitter taste, and the active ingredients in it also need to be boiled for a long time to be fully exerted, so it is generally recommended to boil honey grapefruit tea for about 1 hour.