Drinking too much brown sugar water may lead to elevated blood sugar, fatness and tooth decay. 1. Elevated blood sugar: The sugar content in brown sugar water is high and drinking too much of it may lead to high blood sugar. At the same time, diabetics should not drink brown sugar water, otherwise it may aggravate the condition. 2. Obesity: Drinking too much brown sugar water, making the body sugar is too high, part of the sugar into fat, fat in the body a lot of deposits easily triggered obesity. 3. tooth decay: the oral cavity contains many bacteria, the sugar in brown sugar water through the bacterial decomposition and fermentation, will produce acidic substances corrosion of teeth, acidic substances in the teeth of excessive deposition, which can easily lead to tooth decay. It is recommended to drink the right amount of brown sugar water according to their own constitution, weak digestion, diabetic patients are not recommended to drink too much brown sugar water.