Fluid injection to help lubricate your knee, to prevent knee pain and osteoarthritis NAKORNTHON HOSPITAL What to eat, drink, and avoid to increase joint fluid for dry knee joints? ACC English 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 lubricant Best Food For Knee Pain Relief Visco Injections for Knee Arthritis: Types, Cost, and What to Expect