Actually EQ will increase collagen synthesis at a slightly higher rate than deca. Remember that EQ is what they give to injured horses (Hence the name Equipoise !)
Deca, Equipoise, Anavar, and Primobolan will all increase skeletal muscle while at the same time dramatically increasing collagen syn as well as bone/density. Deca is actually approved by the FDA for treatment of osteoporosis. Anavar has the most actual "studies" documenting it's effectiveness at collagen synth
So, if were talking joint lubrication, sure Deca is good. If your talking tendons, ligaments, and joints than all of the above are effective. Don't take our word for it, though. Do some more research
The 2 Lunatics -- Bob & Jessica