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Not to be confused with food ash.
Potential renal acid load (PRAL) is a measure of the acid that the body produces after ingesting a food. This is different from pH, which is the acidity of a food before being consumed.[1][2] PRAL is a different acidity measure than the food ash measurement.[3]
Some acidic foods actually have a negative PRAL measurement, meaning they reduce acidity in the stomach.[4][5]
A low PRAL diet (not to be confused with an alkaline diet) can lower acidity in the stomach, which can be helpful for people suffering GERD or Acid Reflux. However, it does not lower the pH of blood and therefore cannot treat osteoporosis or other conditions.[6]
^Osuna-Padilla, I. A.; Leal-Escobar, G.; Garza-García, C. A.; Rodríguez-Castellanos, F. E. (2019). "Dietary Acid Load: mechanisms and evidence of its health repercussions". Nefrologia. 39 (4): 343–354. doi:10.1016/j.nefro.2018.10.005. PMID 30737117. S2CID 196533664.
^"Acid Or Alkali – What Does Food Choice Have To Do With It?". Clinical Education. 28 August 2014.
^"Do alkaline diets work? (Part 2 of 2)". AllergyResearchGroup. 22 January 2019.
^"ACID REFLUX RELIEF MYTHBUSTERS: DO ACIDIC FOODS CAUSE ACID REFLUX?". Nutrition by Erin. 14 February 2017.
^"PRAL: How This Number Can Protect Renal Function". Plant Powered Kidneys. 14 June 2023.
^"Can an alkaline diet cure your acid reflux?". CNET.
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