Figure 2From: Effect of a natural extract of chicken combs with a high content of hyaluronic acid (Hyal-Joint®) on pain relief and quality of life in subjects with knee osteoarthritis: a pilot randomized double-blind placebo-controlled trialAverage change from baseline in SF-36v2 physical component summary score during the trial (higher is better) ((solid symbols = active product, open symbols = placebo).Back to article page