My mother-in law is having some pain in her knees from past 15 days specially while sitting down and getting up. Her age is 56. She has no other disease. She is fit otherwise. Is is due to age factor or lack of calcium. She visited a General physician he prescribed some medicines from his clinic for 3 days. These medicines only help for limited time then again there is a pain. Kindly reply with what all she should include in her diet to gain calcium and what is the cure of this knee pain. Thanks.