The water in you: What water does for your body U.S. Geological Survey Did you know your joints are mostly water? Just like an engine needs oil to run smoothly, your joints need water to stay lubricated. Hydration helps maintain the volume of synovial Water affects almost every system in your body. , Hydration plays a role in focus, digestion, energy, temperature regulation, and how your body functions throughout the day., How much water do you How Dehydration Affects Your Joints Water Based Lubricants Natural ingredients Happy Ending Fluid Lubricates Joints Biological Strategy AskNature