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My kidney tests are normal but blood test shows high phosphorus of 5.1.why is this.

2 Doctors Answered
If your phosphorus level is higher than 5.5 mg/dL, some detective work is needed to uncover the cause. It’s likely that you’re eating high-phosphorus foods regularly. To know what is high in phosphorus, let’s clue you in on the likely offenders: Milk, ice cream, yogurt, or pudding Cheese or peanut butter Cheese-flavored crackers or snack foods Liver, organ meats, hot dogs, sausage, or “enhanced meats” Canned salmon (with bones) or sardines Nuts or seeds (including almonds, pecans, peanuts, walnuts, sunflower and pumpkin seeds) Dried beans and peas or baked beans (including canned beans and peas) Quick breads, biscuits, cornbread, pancakes Pizza, lasagna, tacos, corn tortillas, or ‘fast foods’ Chocolate, caramels, or candies containing chocolate, nuts, or peanut butter Colas, some canned and bottled teas and lemonades, beer, cocoa Latte and cappuccino Foods or drinks with hidden sources of phosphorus. Ask your dietitian for a list. It is important to restrict your phosphorus. Phosphorus can be found in milk, dairy products, cola beverages, meats, whole grains, chocolate, legumes, nuts and seeds. People with high phosphorus level should limit or avoid these foods in diet. Use low-phosphorous vegetables, such as potato, squash, cabbage, beets, carrots, cucumbers, tomato, onions and lettuce. Avoid vegetables that contain higher levels of phosphorus, such as peas, beans, lentils, corn, sweet potato, artichokes, asparagus, broccoli and spinach. Drink water, ginger ale, lime soda and root beer instead of cola drinks.
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A high level of phosphate in the blood is usually caused by a kidney problem. ... Calcium and phosphate in the body react in opposite ways: as blood calcium levels rise, phosphate levels fall. A hormone called parathyroid hormone (PTH) regulates the levels of calcium and phosphorus in your blood. Extra phosphate is filtered by the kidneys and passes out of the body in the urine. A high level of phosphate in the blood is usually caused by a kidney problem. ... A hormone called parathyroid hormone (PTH) regulates the levels of calcium and phosphorus in your blood.
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