Nandrolone increases synovial fluid. Hence the extra little cushion it can give joints.
I believe it’s ability to truly improve joint pain issues are widely exaggerated. Unless you’re old and dried up as synovial fluid tends to decrease with age.....If this is the case it can help....but in the case of a 25 yo guy throwing deca in to help alleviate joint pain.....placebo at best.
Just from experience, deca has an effect on joint pain... even in low doses. My issue with the subject is that most cats overstate the benefits. You read a round a little and it seemingly cures their rheumatological issues.