Before starting lc diet in Dec. I used to get leg cramps at night, sometimes very painful, my Dr. prescribed quinine before going to bed and it was very helpful. Since going on the Atkins diet however and walking 3 mi. a day I have not had any leg cramps. I also have been taking coral calcium for quite sometime and have noticed my knees are feeling a lot better. Most health food stores carry coral as well as a lot of drugstores now. Fred