Four years ago I had such bad knees and swollen knuckles that I had difficulty getting up a set of stairs. I went to my family doctor, had x-rays done of my knees, and was told that I needed knee replacements in both knees. The waiting time was 1 year to get replacements. I started taking joint collagen, boron, turmeric, and vitamin D. I started gradually with vitamin D and worked up to 50,000 IU per day with k2 as mk7 for 6 months. The results were absolutely amazing!! By the time my scheduled knee surgery was to take place, I was walking so well, without any pain, I canceled the surgery.