I am allergic to fish and shellfish and and thrilled that this product exists. I am a runner and this has allowed me to continue in my routine and take care of my knees! It's very expensive, so I don't take the full recommended amount of three tablets every day. I only take them on running days, but that has done the trick! I am convinced that these have successfully helped my stave off knee pain! I would probably increase my supplementation with this product if it was around the same price as the fishy products.