ph of urine

Different types of foods cause different levels of acidity of urine depending on their ash contents. (1)Bonjour JP. Nutritional disturbance in acid–base balance and osteoporosis: a hypothesis that disregards the essential homeostatic role of the kidney. British Journal of Nutrition / Volume 110 / Issue 07 / 14 October 2013, pp 1168-1177. Available here. (3)Welch AA, Mulligan A, Bingham SA, Khaw KT. Urine pH is an indicator of dietary acid-base load, fruit and vegetables and meat intakes: results from the European Prospective Investigation into Cancer and Nutrition (EPIC)-Norfolk population study. Br J Nutr. 2008 Jun;99(6):1335-43. Epub 2007 Nov 28. Available here.

Some minerals are acid forming (acid-ash): phosphate, chlorine, sulfur. The results of eating foods with a high ratio of such minerals are that they are excreted via urine in order to balance the blood pH. The presence of high acid forming minerals in the urine makes it acidic.

Some minerals are alkaline forming: potassium, calcium and magnesium. Conversely, a diet rich in alkaline minerals will reduce the acidity of the urine, since less acidic substances will be removed through urine. (2)König D, Muser K, Dickhuth HH, Berg A, Deibert P. Effect of a supplement rich in alkaline minerals on acid-base balance in humans. Nutr J. 2009; 8: 23. Published online 2009 Jun 10. Available here.

Urine acidity can be easily measured in the lab by taking a urine sample for minerals or acids or by pH test strips which can be done at home.

References   [ + ]

1. Bonjour JP. Nutritional disturbance in acid–base balance and osteoporosis: a hypothesis that disregards the essential homeostatic role of the kidney. British Journal of Nutrition / Volume 110 / Issue 07 / 14 October 2013, pp 1168-1177. Available here.
2. König D, Muser K, Dickhuth HH, Berg A, Deibert P. Effect of a supplement rich in alkaline minerals on acid-base balance in humans. Nutr J. 2009; 8: 23. Published online 2009 Jun 10. Available here.
3. Welch AA, Mulligan A, Bingham SA, Khaw KT. Urine pH is an indicator of dietary acid-base load, fruit and vegetables and meat intakes: results from the European Prospective Investigation into Cancer and Nutrition (EPIC)-Norfolk population study. Br J Nutr. 2008 Jun;99(6):1335-43. Epub 2007 Nov 28. Available here.

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