I had bone pain and doctor said you can use only calcium supplement. There was not any significant change in my condition while I was using calcium supplement. My husband suggested to use CALCINANO for a month. I used two weeks one tablet every day and experienced tremendous improvement in my bone pain. I consulted my doctor and he suggested to continue. After a month, I am taking every alternate day and found, I have no pain in my bone. I feel more energetic and no difficulty to go for a walk. Great product indeed.