What Should Normal Fluid Intake Be? A Guide to Hydration
                                
                                
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                                    5 min read                                
                            
                                The body loses approximately 2.5 to 3 liters of water per day through perspiration, urination, and breathing, a fluid loss that must be replenished to maintain vital bodily functions. While the well-known '8 glasses a day' rule is a good start, true fluid needs are more individualized and complex. This comprehensive guide will help you understand the true science of hydration.