As part of my Equine Sports Massage Diploma I had to investigate all the big joint supplements on the market and compare them - price, effectiveness, dosage etc. On my work Cortaflex came out the best value for money combined with good results. All the joint supplements helped, but it was a case of how much money you wanted/could spend. My girl has only had minor issues with her joints, so I find that Superflex caters for her perfectly well, and is very affordable.