I am with you! Not to make fun of the folks that use it, they may get the last laugh.
I know that Condritin and glucosomine(sp on both) have both been discredited by many studies, along with shark cartilage etc, but it is a multi million/billion dollar industry.
Jack Hanna does commercials for this product claiming it helps with bone troubles in dogs, I guess he is payed well to say it.
What I get all the time are people telling me about some herb or whatever that will help me lose weight. Usually, these recommendations originate from Dr. Oz. He's on tv during the day. Now, Dr. Oz received his medical degree from Johns Hopkins and is a cardiac surgeon by profession, but he hawks zillions of products with claims that they cure everything. Most of his products are quackery. I'm reasonably sure he's well paid to promote this stuff of maybe he has some financial interest in the products. Whatever...but even if these products are harmless, I'd go broke if I bought them all. But there are fans of his who would jump off a cliff if he told them to.
I prefer to trust in my own cardiologist and in information from reputable sources such as Cleveland Clinic Nothing wrong with being old fashioned. I've followed my “old fashioned” doctor's advice and he hasn't failed me yet.