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Results 1 - 1 of 1 for HYALURONIC ACID OR NIACINAMIDE OR TRETINOIN
  1. Medicines, injections, and supplements for arthritis 
    Hyaluronic acid is a substance already in the fluid of your knee. It helps lubricate the joint. When you have arthritis, the hyaluronic acid in your joint becomes thinner and less effective. ...
    https://medlineplus.gov/ency/patientinstructions/000374.htm - Medical Encyclopedia