Hyaluronic Acid Injection How to Quickly Lubricate a Stiff Knee Synovial Fluid = Knees Natural Lubricant, It reduces friction, nourishes cartilage & absorbs shock, Low or poor quality synovial fluid more friction cartilage wear knee arthritis, Why Natural Joint Lubrication: How to Keep Your Joints Healthy Liv Hospital Joint Lube Dr. Green Life A gel injection for the knee helps improve joint lubrication when natural synovial fluid becomes thinner or less effective, which often happens with arthritis., This gel acts as a cushion and