I am using layman terms here. If I start using scientific terms, I don't think many will understand. By the way, I have done my research long time ago. The "lubricant" is called synovial cavity or fluid and is produced in the synovial membrane which surrounds the articular cartilage. Do you know of this? Want me to elaborate more? Maybe you should start doing some studying too. 
Yah. I saw the ad in the papers yesterday. Manufactured locally by some company call Pahang Pharmaceutical.

Taken by itself yes. But taken in conjuction with other antioxidants, it has been found to help with joint pains. But you'll have to take it for quite a long period of time. Perhaps only after 3-6 months of taking it, you'll see some improvements.

I'm taking this.

i'm taking BiO-LiFE's Glucosamine.
They have Glucosamine and Chondroitin Sulphate too. Maybe i should try getting that for my mom. Kinda worried with her taking viatril-S (read earlier that it elevates high blood pressure because of the salt content)