Protein helps maintain healthy bone and tissue. But consuming too much protein can lead to calcium excretion through urine. This can cause kidney stones.
It is important that you note that not all people develop kidney stones when they consume more than 2 grams of protein per kg (2.2 pounds). You don't have to eat a lot of protein to get kidney stones.
By watching how much sodium you consume, kidney stones can be prevented. Sodium helps regulate water balance in the kidneys. Too much sodium results in a higher risk of developing kidney stones.
If you have kidney stone, you might also consider reducing your protein intake. The majority of adults need protein for half their daily caloric needs. You'll lose weight if you reduce your intake of protein.
If you do decide to eat more protein, don't go overboard. Limit your intake to 20% of your total daily protein intake.