Storz Maximilian Andreas, Ronco Alvaro Luis
Department of Internal Medicine II, Center for Complementary Medicine, Freiburg Medical Center - Faculty of Medicine, University of Freiburg, Freiburg, Germany.
Unit of Oncology and Radiotherapy, Pereira Rossell Women's Hospital, Montevideo, Uruguay.
Nutr Health. 2023 Sep;29(3):363-368. doi: 10.1177/02601060231164667. Epub 2023 Mar 15.
In 1995, Remer and Manz reported potential renal acid load (PRAL) values of various foods, quantifying their estimated impact on acid-base balance. Their estimation considered ionic dissociation, sulphur metabolism and intestinal absorption rates for several micronutrients and proteins. Notably, PRAL values are based on food content data from the early 1990s and may nowadays no longer adequately reflect accurate estimates. Some foods' macronutrient and mineral content has declined over the past three decades due to changes in soil mineral health. We hypothesize that the 1995 PRAL values no longer adequately reflect reliable estimates of the current acid-base impact of some foods. Based on specific examples, we argue that these values overestimate the alkalizing effects of various fruits and vegetables. Discussing evidence in favour of (and against) our hypothesis, we conclude that the 1995 PRAL estimates should nowadays rather be used as a relative guidance and reviewed carefully.
1995年，雷默和曼茨报告了各种食物的潜在肾酸负荷（PRAL）值，量化了它们对酸碱平衡的估计影响。他们的估计考虑了离子解离、硫代谢以及几种微量营养素和蛋白质的肠道吸收率。值得注意的是，PRAL值基于20世纪90年代初的食物成分数据，如今可能不再能充分反映准确的估计。由于土壤矿物质健康状况的变化，过去三十年中一些食物的常量营养素和矿物质含量有所下降。我们假设1995年的PRAL值不再能充分反映某些食物当前对酸碱影响的可靠估计。基于具体实例，我们认为这些值高估了各种水果和蔬菜的碱化作用。在讨论支持（和反对）我们假设的证据后，我们得出结论，如今1995年的PRAL估计值更应被用作相对指导并仔细审查。
