Glucosamine effective against chronic tendonitis?

Question:
I’ve been coping with pain in my musculoskeletal system for years, especially my tendon attachments in my upper arm appear to be chronically. Recently I was made aware of the existence of glucosamine. Does glucosamine also help against chronic tendonitis.

 Answer:
Our supplements have a proven effect on osteoarthritis (wear of cartilage in the joints). Unfortunately, there is little evidence for an effect in tendonitis, and we therefore have little evidence from daily practice.

An exception is bursitis, an inflammation in the shoulder. Glucosamine and Arthro-5 (with glucosamine as an ingredient) are often effective. But for other tendonitis symptoms the supplements won’t do much.