question: my brother is 3o yrs old and suffers from chronic renal failure. As a result he often gets severe pain in his legs and joints and back pain. We have evaluated him for everything.but there seems to be no apparent cause for the pain.One of the fellow patients suffering from similar complaints recommended him to try carnisure which was prescribed to him by his doctor. Please advise  as to what carnisure is advisable for him and relieve him of he pain. His calcium and phosphate levels are also ok.