1. It is very normal for grapefruit meat to have a bitter taste when cooked. We can try to add some honey and sugar to the water when cooking grapefruit to neutralize the bitter taste of grapefruit with something sweet.

2. Or we can try putting grapefruit meat in a pot and blanching it several times to see if this can dilute the bitter taste of the cooked grapefruit meat, but doing so may make the grapefruit lose its effect of removing fire.

In fact, not only the boiled water of grapefruit meat is bitter, but also some kinds of grapefruit, such as huyou. If you don't adapt to the bitter taste of grapefruit, you'd better avoid buying this kind of grapefruit.