"Yes to both," here, too. Been taking them for several years now.

I get Schiff's Move Free Advanced, in the green box, for glucosamine and chondroitin. It also includes joint fluid, which is what I need, as I have no cushioning left between the bones in both knees. Double knee replacements are in my future. Osteo Biflex is the only other brand I've ever heard a medical person recommend. Often, shops here will offer 2 for the price of 1 deals on those 2 brands, as well.

Fish oil helps reduce inflammation. IN addition to the other things someone already mentioned.

Here in the US, neither product is regulated by the FDA. This means it varies widely from brand to brand, what you are getting, in the amount, in any additives used, etc. So when you find one that works, stick with it. Switching for "the one on sale that week" is definitely NOT recommended for these types of products. One brand will work and another won't, because the dosage can be quite different. You may or may not be able to figure out the differences from the labeling.

Your last question, does it help? Definitely! If I miss either one for 3 days, I KNOW IT! AND, I developed arthritis in my neck. Only way I learned this was I ran out of the Schiff's and tried waiting for a sale. Suddenly I had limited head movement, ouch!

BTW, here, arthritis and rheumatism are treated differently, have different causes and issues.