Need. Boiled water chestnut need to peel, water chestnut is a kind of aquatic plant, living in the silt, its outer skin has a lot of mud, carrying a large number of bacteria microorganisms and parasites, etc., not clean, after eating will cause discomfort. Horseshoe phosphorus content is very high, the development of teeth and bones have great benefits, horseshoe boiled water has a good effect of clearing heat and diarrhea, horseshoe lotus boiled water should be peeled.