For simple bad breath, try chewing fresh orange peel, because orange peel contains a lot of vitamin C and essential oils, which have the functions of regulating qi and resolving phlegm, strengthening the spleen and stomach. After chewing it, spit out the residue, and repeat it several times to remove bad breath. In particular, 80% of the vitamin C of kumquats is concentrated in the peel, up to 200 mg per 100 grams. Therefore, if the peel is washed and eaten with the pulp, the throat will feel moist and fragrant.