Tendon supplements?

I’m not usually a big fan of oral supplements, but my horse has suspensory desmitis and I’m looking to help her out in any way I can. I was looking at Smartpak today and they offer a few tendon and ligament supplements. Most have collagen, MSM, silica, etc. and I’m curious if anyone has used these types of supplements with any success.

I have used these, but only because they included in a joint supplement. I have not had any specific tendon issues on either of my horses but my younger (retired) one does/did have issues with this medial patellar ligament. Supplements on their own did not help him but his issues were beyond a supplement.