The Startling Link Between Kidney Health and Regular Salt Use

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Kidney Health: High salt intake has long been associated with various health issues, such as high blood pressure, heart failure, and kidney disease. However, a recent study published in the Journal of the American Medical Association (JAMA) has uncovered a more specific concern – the self-reported frequency of adding salt to meals and its significant association with the risk of chronic kidney disease (CKD).

What does the study say?

Kidney health

The study, which was headed by Dr. Lu Qi, a Tulane University epidemiology professor, and his colleagues, used data from the UK Biobank, a vast biomedical database that contains information from over 465,000 participants. The study, which was carried out from 2006 to 2010, was centred on 56-year-old participants who did not have chronic kidney disease at the time of enrollment. The goal of Qi’s team’s study was to investigate the distinct association between self-reported salt intake and the onset of chronic kidney disease. This was in contrast to earlier research, which frequently included participants with multiple medical conditions, making it difficult to isolate the effect of sodium consumption on kidney health.

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​What are the risk factors?

When asked to rate how often they salted their food, participants could choose to answer “never or rarely” or “always.” The results of the study showed a worrying association between eating salt during meals and a higher chance of developing chronic kidney disease. The ability of this study to retain statistical significance even after controlling for significant confounding variables like diabetes and high blood pressure was what set it apart. The statistics indicated that people’s risk of acquiring chronic kidney disease increased with the frequency with which they added salt to their food. Despite careful statistical adjustments, there was still a substantial connection. Based on their self-reported salt consumption, participants were divided into three groups. Those who said they added salt “always” had a startling 29% higher chance of developing chronic kidney disease. The risk percentages for the “usually” and “sometimes” categories declined but were still significant.


Salt intake and kidney health risk

To put that in context, individuals who stated that they used salt “always” were 29% more likely to develop chronic renal disease than individuals who stated that they used salt “never or rarely.” For the “usually” group, this percentage dropped to 12%, and for the “sometimes” group, it dropped to 7%. The “always” group showed an increased risk of 6% even after adjusting for a number of confounding factors, such as age, sex, infectious disease, and high blood pressure. The “usually” group showed an increased risk of 5%, and the “sometimes” group showed an increased risk of 2%. Consuming too much salt may still be a sign of other bad lifestyle choices that raise the risk of chronic renal disease.

Kidney Health: Is salt bad for you?

One of the main minerals in salt, sodium, is essential for nerve impulses, muscular contraction, and fluid retention. Nonetheless, the study draws attention to the possible dangers of consuming too much salt. Adults are advised by the US Food and Drug Administration (FDA) to consume no more than 2,300 mg of sodium daily.


​How to cut down on salt in your diet

Cutting back on salt doesn’t mean cutting it out of your diet entirely. Instead, it entails changing to a healthy diet and making educated decisions regarding the sources of salt. Making fresh food selections and switching to a more plant-based diet can help to further improve this reduction. Another useful action people can take to get perspective on their salt intake is to check the labels of foods to see how much sodium is there. The study emphasises the significance of reducing daily salt intake, as clinical trials have demonstrated that doing so may minimise the risk of hypertension and cardiovascular illnesses. – KIDNEY HEALTH

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The startling link between renal health and regular salt use
The startling link between renal health and regular salt use