@downdog I think that there is no definitive proof that taking collagen will made DD worse but I don't want to take a chance as mine is active right now and getting worse. Have you seen a change in your DD since you started Fortibone? I looked it up and Fortibone stimulates collagen production so I am going to be very cautious as I am looking at another hand surgery this summer. We all have to look at all the information available and look for solutions that suit our individual needs as we are all different. Has Fortibone improved your numbers?