CDAI may reduce kidney stonesHigh composite dietary antioxidant index is associated with reduced risk of kidney stones: a cross-sectional analysis of NHANES 2007-2020.
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We examined the relationship between dietary antioxidant intake, particularly vitamin C, and the risk of developing kidney stones. Utilizing data from the National Health and Nutrition Examination Survey, we found that individuals with higher levels of antioxidants, as indicated by the Composite Dietary Antioxidant Index (CDAI), had lower odds of forming kidney stones.
Stone formers, those who have experienced kidney stones, typically had a lower CDAI, showcasing significant differences based on gender. An interesting aspect of our findings was that vitamin C stood out as having the strongest negative correlation with kidney stones, suggesting that increased intake may be beneficial.
The results indicated that those in moderate and high CDAI groups had reduced odds of experiencing kidney stones compared to the lowest group. This was reflected in the odds ratios, which showed a significant decrease for those with higher antioxidant consumption. Therefore, it seems that a diet rich in antioxidants, particularly vitamin C, could play a role in lowering kidney stone risks.
However, while our findings are promising, we emphasize the need for more in-depth cohort studies to further investigate this potential connection and confirm its causal nature.