I have knee problems for many years as all my family members have this issue.
I do take selenium, Sea Salt and vitamin C. I took 1000mg then 3000mg and now 5000mg. I started with 1 drop 3 years ago, build it up to 24 drops and then stopped for a while when I thought I am ok. I recently started about six months ago with 10 drops a day then found out that I have a cyst on my kidney so bumped it up to 50 gradually. I am feeling so much better with 50 drops now. The cyst is still there but just a bit smaller.