My Mom Used To Take A Liquid Glucosamine Condroitin Supplement

My mom used to take a liquid glucosamine condroitin supplement fron GNC. It had something else in it , I can't remember what. It worked for her at the time now she complains of pain in the right knee again. Is there any benefit to me getting this for her again? She is 89 and has multiple morbidities, which she also had before.