How much water should I drink by age? A comprehensive guide
                                
                                
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                                    5 min read                                
                            
                                Water is your body's principal chemical component, constituting 50% to 70% of your body weight, with every cell, tissue, and organ depending on it to function properly. However, daily hydration needs are not one-size-fits-all, as they change significantly throughout a person's life.