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Phosphorus Content in Commonly Consumed Beverages

      Researchers agree that consuming soda leads to a myriad of health concerns, including the increased risk of diabetes, obesity, poor dental health, and cardiovascular disease, which can lead to stroke, myocardial infarction, and premature death.

      Levine, MI. Kidney Disease Education. Nutrition: Phosphorus and the Kidney Diet. http://www.kidneyeducationmilevinemd.com/nutrition-rm3.php. Accessed September 3, 2013.

      Because certain sodas, especially dark colas, contain inorganic phosphates, or additives, in high amounts, soda consumption among patients with chronic kidney disease is even more dangerous.
      • Kalantar-Zadeh K.
      • Gutekunst L.
      • Mehrotra R.
      • et al.
      Understanding sources of dietary phosphorus in the treatment of patients with chronic kidney disease.

      Hyperphosphatemia

      Phosphorus is a mineral essential for the proper functioning of the body. It is found primarily in the bones and is necessary for all cellular processes.

      Levine, MI. Kidney Disease Education. Nutrition: Phosphorus and the Kidney Diet. http://www.kidneyeducationmilevinemd.com/nutrition-rm3.php. Accessed September 3, 2013.

      It plays an important role in controlling pH balance, energy production and storage, hormone secretion, utilization of B vitamins, oxygen delivery to tissues, and the growth of connective tissue. Most importantly, it works with calcium to build strong bones.
      • Kalantar-Zadeh K.
      • Gutekunst L.
      • Mehrotra R.
      • et al.
      Understanding sources of dietary phosphorus in the treatment of patients with chronic kidney disease.
      In people with healthy, functioning kidneys, excess phosphorus is removed by the body. However, individuals with chronic kidney disease cannot adequately remove phosphorus and are at a higher risk of developing hyperphosphatemia.

      Levine, MI. Kidney Disease Education. Nutrition: Phosphorus and the Kidney Diet. http://www.kidneyeducationmilevinemd.com/nutrition-rm3.php. Accessed September 3, 2013.

      This may ultimately result in elevated parathyroid hormone secretion, progressive deterioration of kidney function, renal bone disease, vascular calcification, increased risk of cardiovascular accidents, and higher mortality rates.
      • Kalantar-Zadeh K.
      • Gutekunst L.
      • Mehrotra R.
      • et al.
      Understanding sources of dietary phosphorus in the treatment of patients with chronic kidney disease.
      • Uribarri J.
      Phosphorus additives in food and their effect in dialysis patients.
      Because elevated phosphorus affects bone and cardiovascular risk, the Kidney Disease Improving Global Outcomes guidelines refer to this condition as mineral bone disorder of chronic kidney disease.
      Kidney Disease Improving Global Outcomes
      KDIGO clinical practice guidelines for the diagnosis, evaluation, prevention, and treatment of chronic kidney disease-mineral and bone disorder (CKD-MBD).
      Patients with chronic kidney disease are likely to experience certain symptoms when their phosphorus gets too high. Individuals with diabetes may suffer from severe itching all over their body.

      Levine, MI. Kidney Disease Education. Nutrition: Phosphorus and the Kidney Diet. http://www.kidneyeducationmilevinemd.com/nutrition-rm3.php. Accessed September 3, 2013.

      In the dialysis population, elevated serum phosphorus levels are a constant struggle for the clinical team and the patient alike. As a dietitian, there is a constant search for a solution to help renal patients control their serum phosphorus and in many cases to remember to take their phosphate binders.

      Phosphorus Additives

      Americans have become accustomed to highly processed, packaged, convenience foods. This includes the increased consumption of soda and sugar-sweetened beverages. CNN reports that sweetened beverage intake should be limited to less than 12 oz per day, but nearly 1 in 20 Americans drink more than 48 oz of soda each day. This is not to mention that serving sizes have nearly tripled since the 1950s.

      Park M. Half of Americans Sip Sugary Drinks Daily. CNN. August 2011. http://www.cnn.com/2011/08/31/health/soda-drinking-habits/index.html. Accessed September 12, 2013.

      In addition, processed foods in the early 1990s contributed approximately 470 mg per day to the American diet, but today this has more than doubled to provide 1,000 mg per day.

      Park M. Half of Americans Sip Sugary Drinks Daily. CNN. August 2011. http://www.cnn.com/2011/08/31/health/soda-drinking-habits/index.html. Accessed September 12, 2013.

      These beverages pose a threat for patients with chronic kidney disease because of their high phosphorus content.
      • Kalantar-Zadeh K.
      • Gutekunst L.
      • Mehrotra R.
      • et al.
      Understanding sources of dietary phosphorus in the treatment of patients with chronic kidney disease.

      Park M. Half of Americans Sip Sugary Drinks Daily. CNN. August 2011. http://www.cnn.com/2011/08/31/health/soda-drinking-habits/index.html. Accessed September 12, 2013.

      According to Kalantar-Zadeh and colleagues,
      • Kalantar-Zadeh K.
      • Gutekunst L.
      • Mehrotra R.
      • et al.
      Understanding sources of dietary phosphorus in the treatment of patients with chronic kidney disease.
      the amount of phosphorus absorbed from food additives is much higher (>90%) than that of natural sources, such as animal and plant proteins (40-60%).
      • Uribarri J.
      Phosphorus additives in food and their effect in dialysis patients.
      Several preservative and additive salts containing phosphorus are found in processed, convenience foods. These additives are useful in prolonging shelf life, enhancing flavor, retaining moisture, and improving the color of the food item.
      • Uribarri J.
      Phosphorus additives in food and their effect in dialysis patients.

      Park M. Half of Americans Sip Sugary Drinks Daily. CNN. August 2011. http://www.cnn.com/2011/08/31/health/soda-drinking-habits/index.html. Accessed September 12, 2013.

      The form of phosphorus in additives is not bound to protein, but rather it is a salt that is readily absorbed in the intestinal tract. Table 1 illustrates the nutritional content, including the calorie, potassium, and phosphorus content found in commonly consumed beverages. It is of interest that most clear sodas are lower in phosphorus, but many still contain natural and added potassium (Gordon D, personal communication, July 12, 2013).
      Table 1Phosphorus and Potassium Content of Commonly Consumed Beverages
      ProductCaloriesPotassium (mg)Phosphorus (mg)
      Aquafina Flavor Splash Grape<1<185
       Lemon<15767
       Peach Mango<15782
       Raspberry<1-62
       Strawberry Kiwi<15782
       Wild Berry<1<162
      A&W Root Beer174<1<1
       Diet Root Beer<1<1<1
       Cream Soda174<1<1
       Diet Cream Soda<1<1<1
      Barq's Root Beer166<1<1
       Barq's Diet Root Beer<112<1
       Barq's Red Cream172<1<1
       Barq's Diet Red Cream6<1<1
       French Vanilla Cream168<1<1
       Diet French Vanilla Cream2<1<1
      Canada Dry Ginger Ale140<1<1
       Diet Ginger Ale<1<1<1
       Cranberry Lime Seltzer<1<1<1
       Mandarin Orange Seltzer<1<1<1
       Raspberry Seltzer<1<1<1
       Lemon Lime Seltzer<1<1<1
       Tonic Water135<1<1
       Club Soda<1<1<1
      Coca-Cola145<158
       Coca-Cola with Lime1465156
       Coke Zero24754
       Diet Coke21827
       Diet Coke with Lime32927
       Cherry Coke156<156
       Diet Cherry Coke22935
       Cherry Coke Zero25056
       Vanilla Coke200056
       Vanilla Coke Zero24756
      Crush
       Orange162<1<1
       Diet Orange<1<1<1
       Grape16255
       Cherry16255
      Dr. Pepper1502054
       Dr. Pepper 1010<128
       Diet Dr. Pepper<1<150
       Dr. Pepper Cherry1502054
       Cherry Vanilla1442860
      Fanta Apple182<1<1
       Berry176262
       Citrus1362<1
       Grape183<1<1
       Lemon168<1<1
       Orange16753<1
      Fresca Original Citrus<1<1<1
       Black Cherry<1<1<1
       Peach Citrus<1<1<1
      Fruit Works Apple Raspberry15035100
       Fruit Punch16560123
       Guava Berry16556117
       Passion Orange16560123
       Peach Papaya16560123
       Pink Lemonade1658063
       Strawberry Melon165110120
       Tangerine Citrus1653590
       Tropical Berry16560140
      Hawaiian Punch17050175
       Fruit Juicy17045173
       Green Berry Rush17043173
      Lipton Iced Green Tea with Citrus701065
       Iced Tea Sweetened701519
       Iced Tea Unsweetened<11018
      Mello Yellow17010<1
       Diet<1<1<1
      Mountain Dew110<1<1
       Diet Mountain Dew<163<1
       Mountain Dew Coe Red1701053
       Mountain Dew Live Wire1705<1
      Mug Root Beer17015<1
       Diet Mug Root Beer<110<1
       Mug Cream Soda180<1<1
       Diet Mug Cream Soda<1<1<1
      Nestea Lemon Sweet129<1<1
       Honey Lemon Green12035<1
       Raspberry135<1<1
       Sweetened125<132
       Unsweetened<1<132
      Orange Slice180<135
       Cherry Slice165,<135
       Dr. Slice180<135
      Pepsi1501053
       Diet Pepsi<12533
       Pepsi Max<12042
       Pepsi Next351533
       Wild Cherry1601053
       Diet Pepsi Lime<14089
       Diet Pepsi Vanilla<14589
      Pibb Xtra1452144
       Pibb Zero23344
      Schweppes Ginger Ale180<1<1
       Diet Ginger Ale<1<1<1
       Tonic Water135<1<1
       Club Soda<1<1<1
      Sierra Mist9035<1
       Diet Sierra Mist<171<1
       Sierra Mist Cranberry Splash16050<1
       Diet Cranberry Splash<137<1
       Sierra Mist Strawberry Kiwi14050<1
       Diet Strawberry Kiwi5137<1
      Sprite144<1<1
       Sprite Zero3.6110<1
      Tropicana Fruit Punch1309093
       Lemonade1204038
       Pink Lemonade1703937
       Peach Papaya1204193
       Strawberry Melon1507693
      Tropicana Twister Orange19553<1
       Diet Orange053<1
       Strawberry16530<1
       Grape18053<1

      Labeling

      Phosphorus additives on labels are often hard to decipher because of the use of complex names for the ingredients.
      • Kalantar-Zadeh K.
      • Gutekunst L.
      • Mehrotra R.
      • et al.
      Understanding sources of dietary phosphorus in the treatment of patients with chronic kidney disease.
      Phosphorus salts are typically included in a product's ingredient list by the manufacturer. However, in the United States, the U.S. Food and Drug Administration does not require manufacturers to list the quantity of phosphorus per serving on food labels.

      Park M. Half of Americans Sip Sugary Drinks Daily. CNN. August 2011. http://www.cnn.com/2011/08/31/health/soda-drinking-habits/index.html. Accessed September 12, 2013.

      Therefore, it is extremely difficult to distinguish between natural phosphorus and phosphorus salts used as additives. Many renal patients mistakenly believe that if phosphorus is not listed on the Nutrition Facts label, then there is none in the food.
      • Kalantar-Zadeh K.
      • Gutekunst L.
      • Mehrotra R.
      • et al.
      Understanding sources of dietary phosphorus in the treatment of patients with chronic kidney disease.

      Park M. Half of Americans Sip Sugary Drinks Daily. CNN. August 2011. http://www.cnn.com/2011/08/31/health/soda-drinking-habits/index.html. Accessed September 12, 2013.

      It is also important to consider that phosphorus is not the only mineral found in soft drinks. Sodium and potassium often accompany phosphorus.
      • Uribarri J.
      Phosphorus additives in food and their effect in dialysis patients.
      Salts have the ability to preserve food and improve appearance. Therefore, phosphorus salts are used to enhance flavor and shelf life, meaning they are used most commonly in soft drinks. This research indicates that as a renal dietitian it is extremely important to advise patients to reduce their intake of processed foods such as soda and choose foods with natural occurring, protein-bound phosphorus such as meat.
      • Kalantar-Zadeh K.
      • Gutekunst L.
      • Mehrotra R.
      • et al.
      Understanding sources of dietary phosphorus in the treatment of patients with chronic kidney disease.
      • Uribarri J.
      Phosphorus additives in food and their effect in dialysis patients.

      References

      1. Levine, MI. Kidney Disease Education. Nutrition: Phosphorus and the Kidney Diet. http://www.kidneyeducationmilevinemd.com/nutrition-rm3.php. Accessed September 3, 2013.

        • Kalantar-Zadeh K.
        • Gutekunst L.
        • Mehrotra R.
        • et al.
        Understanding sources of dietary phosphorus in the treatment of patients with chronic kidney disease.
        Clin J Am Soc Nephrol. 2010; 5: 519-530
      2. Fresenius Medical Care. Phosphorus. http://www.ultracare-dialysis.com/HealthyLifestyles/EatHealthy/Vitamins%20and%20Nutrients/Phosphorus.aspx. Accessed September 9, 2013.

        • Uribarri J.
        Phosphorus additives in food and their effect in dialysis patients.
        Clin J Am Soc Nephrol. 2009; 4: 1290-1292
        • Kidney Disease Improving Global Outcomes
        KDIGO clinical practice guidelines for the diagnosis, evaluation, prevention, and treatment of chronic kidney disease-mineral and bone disorder (CKD-MBD).
        Kidney Int. 2009; 76: S1-S130
      3. Park M. Half of Americans Sip Sugary Drinks Daily. CNN. August 2011. http://www.cnn.com/2011/08/31/health/soda-drinking-habits/index.html. Accessed September 12, 2013.

      4. Pepsi Co. Nutrition Information. http://www.pepsicobeveragefacts.com/infobyproduct.php?prod_type=1026&prod_size=20&brand_fam_id=1051&brand_id=1000&product=Pepsi. Assessed July 12, 2013.