👉 Var fluid, also known as intra-articular fluid, is a clear, viscous liquid found within joint cavities, acting as a lubricant and shock absorber to facilitate smooth joint movement. Produced by the synovial membrane lining the joint, it helps reduce friction between articular cartilage surfaces during motion and absorbs mechanical stress, thus protecting the joint from damage. This fluid is essential for maintaining joint health and function, and its composition and volume can be affected by factors such as age, injury, or disease, which may lead to conditions like arthritis if the fluid's quality or quantity is compromised.