Functions of Water: 7 Health Benefits Fluid Lubricates Joints Biological Strategy AskNature DRINKING WATER AND YOUR JOINTS Drinking water is essential for maintaining healthy human joints. Here's how hydration impacts joint health: LUBRICATION: Water is a key component of synovial fluid, which lubricates joints Joint Maintenance for Active Adults Preventative Gel Injections Joint Relief Institute Water helps keep your joints hydrated. The synovial fluid which helps lubricate joints is made up primarily of water. When your body is dehydrated, it pulls water from cartilage and other areas