There are different recommendation about use of calcium and calcium supplements. As far as the prevention of kidney stone is concerned, the dietician suggests the prescription about calcium intake according to the physical body of such person. So the calcium intake guidelines are according to the age, gender, size of the body and type od the kidney stone from which a person is suffering. According to the various medical studies, the calcium that finds in the food like milk, yogurt and cheese defend the body from kidney stone like calcium oxalate. Also medical study on both men and women stated that those person who have higher capacity of taking calcium foods possesses a very lower risk for kidney stones than the person who has little calcium intake in their diet. When there is a balance mixture of normal calcium intake and less amount of protein from animal and salt , then that person can defend the kidney stones healthier than a low-calcium course of therapy. There is change in the metabolism of calcium intake according to the growing age of person. Some medical studies state that higher intake of calcium in the younger men protect kidney stone than men having 60 age. There is the mixture of oxalate in foods when we take calcium in our diet. This dietary calcium assist our body by stop oxalate stone which is going to be captivated into the blood and also exert it in the form of urine. There is the supplement of 80% calcium of the daily diet from dairy products which is used in a normal healthy diet. So if there is a avoidance of calcium intake, then that cause bone loss for the person who is already suffering from calcium stones which is linked with resorption. This resorption is nothing but breakdown of the bone which discharge calcium into bloodstream. As far as intake of calcium supplements is concerned, the medical studies suggest that these calcium supplements decrease the level of oxalate and so it helps to prevent calcium stones in the kidney. If you take 500 mg calcium supplements per day regularly, then it will reactivate the intestine to absorb less amount of calcium. The medical experts normally have the same opinion that supplements of calcium having recommended dosages should be nearly 1, 200 mg per day. Yet, one studey indicates that women who took calcium supplements had a 20% higher risk for stones. Research indicates that dosages of calcium above 2, 000 mg per day are clearly related with kidney stone formation. Few experts argue that this higher risk occurs due to supplements that are often taken in the morning, either without food or with breakfast, which is typically low in oxalates. Risk of formation of such kidney stones is reduced if these supplements are taken after meals. In some medical cases the restriction of calcium is very necessary, Some patients, such as those whose stones are caused by genetic defects that promote the excess absorbtion of calcium by the intestines, have to reduce the daily calcium intake.