We started putting a scoop of collagen in our coffee in the morning probably about six months ago. I don't know if it helps or not but it is supposed to support joint function as well as other things like hair, nails and skin. It is not that the collagen does anything directly to the joints. It is not a medicine. But the theory is it provides the food nutrients so the body has the proper building blocks to produce its own collagen. If we are eating mostly muscle meats without connective tissue we don't get a lot of collagen in our diet. Taking collagen or drinking bone broth should help from the nutritional adequacy aspect.

https://www.youtube.com/watch?v=WZ5fELeV-wM

Here is the one we are using. https://www.amazon.com/gp/product/B07CWMTQ64/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

But I just ordered some I found that is cheaper.  https://www.amazon.com/gp/product/B07Y3ZSZWZ/ref=ppx_yo_dt_b_asin_ti...

But it was the reduction in carbs that cured the pain in joints for me. It was a long time after that we started taking the collagen.

One other thing on pain, I have had for years off and on what seemed like fibromyalgia. I never went to the doctor to get it diagnosed (my understanding is there is really no test for it other than symptoms). I often had just a general achiness in my muscles at times. Not enough to debilitate me or stop me from going, but enough I felt fatigued at times from it. Can't even remember when I noticed I no longer had that condition, but at some time after we went low carb it went away and has not been back.

Going low carb has really been a life changing event for my wife and I. Numerous health improvements. Started it to lose weight, but it turns out the weight loss is just a side benefit. Getting a lot more healthy was the main benefit.

John