What Happens if I Only Drink 3 Glasses of Water a Day?
                                
                                
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                                    4 min read                                
                            
                                According to the U.S. National Academies of Sciences, healthy adults typically need between 2.7 and 3.7 liters of total daily fluid intake, which is far more than three glasses. Drinking only 3 glasses of water a day can lead to a state of chronic mild dehydration with widespread negative effects on your health, from fatigue and headaches to more serious long-term organ damage.