See what effect you want. Grapefruit and lemon are citrus plants. Grapefruit is benign, relieving cough and moistening lung, and it is best to drink in summer. Lemons are rich in VC and can be drunk all year round. It is good for whitening. You'd better not buy these from the supermarket. There are too many additives, and honey is not good or bad. It is best to do it at home. It's simple. You can find the way online.