Sugar disrupts the body's ability to absorb calcium and magnesium, making it a culprit in the formation of kidney stones. Fructose, found in table sugar and high fructose corn syrup, is connected to increased risk of kidney stones. If you want to give your body a healthier lifestyle, and avoid kidney stones while you're at it, try cutting down on the sugar you consume. Some citrus-flavored sodas, such as 7UP and Sprite, contain high levels of citric acid. While you should avoid high-sugar beverages, the occasional clear soda may be a good way to increase your citric acid intake. Exercise for 30 minutes every day. Moderate exercise has been shown to reduce the risk of kidney stones by up to 31%. Aim for at least 150 minutes per week of moderate aerobic activity such as walking, jogging, or gardening. Animal protein, especially red meats, increases your risk of developing kidney stones, especially uric acid stones. Keep animal protein intake to 6 ounces or less — about the size of your palm or a pack of cards — per day to help reduce your risk of developing all types of kidney stones.  Red meats, organ meats, and shellfish are high in a substance called purine. Purine increases your body’s production of uric acid and can cause kidney stones. Eggs and fish also contain purines, although less than red meats and shellfish. Get protein from other sources, such as calcium-rich dairy or legumes. Legumes contain fiber and phytate, a compound that may help prevent kidney stones from forming. Be careful of soybeans, though, as they contain high levels of oxalate. The fact that many kidney stones are made of calcium may make reducing your calcium intake sound like a good idea. However, research shows that diets that are too low in calcium actually increase your risk of kidney stones. Eat a good variety of dairy products, such as milk, yogurt, and cheese, to meet your daily calcium needs.  Children four to eight years old need 1,000 mg of calcium daily. Children 9-18 should get 1,300 mg of calcium daily. Adults 19 and...

TL;DR in Vietnamese:
Tránh tiêu thụ đường, soda và sirô ngô. Tập thể dục. Hạn chế tiêu thụ protein động vật xuống còn 170 g (hoặc ít hơn) mỗi ngày. Bổ sung đủ canxi nhưng tránh sử dụng thực phẩm chức năng. Áp dụng chế độ ăn “ít oxalat”. Không nhịn ăn đột ngột. Đặc biệt cảnh giác nếu bạn có tiền sử bị bệnh sỏi thận.