https://en.wikipedia.org/wiki/Methylsulfonylmethane
https://en.wikipedia.org/wiki/Vitamin_K2
My husband has found the MSM useful; I’ve been taking K2 because some nutritionists have begun to believe that it can be helpful in osteoporosis. It’s a nutrient that lots of us don’t get much of anymore.
If you Bing-around, you’ll find lots of info and opinions on both. (People have been giving MSM to horses for cartilage/joint issues for a long time...)
Thanks darling!