 and you can see there's some yellow and red and green but then at 24 weeks oh so much more green and this is indicative of creating new healthy cartilage at 48 weeks you cannot see any red on the picture you have green fresh glassy cushiony cartilage trust me the picture on the bottom right that's all green after 48 weeks with these bioactive collagen peptides that's a much happier healthier more comfortable knee that person