You know what is real good for joints and your skin that you can eat? You know when you bake a chicken, say in a dutch oven, and all that juice comes out of the chicken... and then you eat your dinner and put the chicken in the fridge, still in the little dutch oven (covered pyrex dish or whatever)... and then when it's cold you have a layer of fat on top and then below that you'll have a layer of gelatin stuff? Well that gelatin stuff is collagen, the same stuff they call collagen II in various different expensive supplements. It's real good for your skin, your joints etc. Scrape off the fat and it's great heated up on mashed potatoes too, chicken drippings, the good part.

Try not to use commercial grade chicken though, the best chicken you can get, usually only costs a couple bucks more anyway. You'll save at least that much in doctor bills downline.