DIET AND MGUS risk appear largely unconnected, with new data from a large nationwide screening study indicating no significant association between overall dietary patterns and monoclonal gammopathy of undetermined significance.
Diet And MGUS Risk in Large Cohort
Monoclonal gammopathy of undetermined significance is an asymptomatic precursor to multiple myeloma and related disorders, making identification of modifiable risk factors a research priority. Investigators analysed data from a nationwide screening study involving 75,422 individuals, of whom 27,217 completed a food frequency questionnaire. Among respondents, 1,020 individuals were identified with monoclonal gammopathy of undetermined significance at screening.
Dietary exposure was assessed through reported intake of specific food items and adherence to five dietary patterns derived using principal component analysis. Logistic regression models were applied to estimate odds ratios for monoclonal gammopathy of undetermined significance, adjusting for age, sex, physical activity, and education.
No Clear Link Between Diet And MGUS
The analysis found no association between overall dietary patterns or individual dietary components and the risk of monoclonal gammopathy of undetermined significance. These findings suggest that habitual diet is unlikely to play a major role in the development of this premalignant condition.
Given the established role of monoclonal gammopathy of undetermined significance as a precursor to multiple myeloma, the absence of dietary associations may also indicate that diet is not a key contributing factor in the pathogenesis of these malignancies.
Dairy Intake and Subtype Differences
Despite the overall null findings, one notable exception emerged in subgroup analysis. High consumption of dairy products was associated with increased odds of immunoglobulin A monoclonal gammopathy of undetermined significance (odds ratio: 2.01; 95% CI: 1.16–3.65). This association remained significant after adjustment for multiple comparisons, suggesting a potential subtype specific relationship.
However, the lack of broader associations across dietary patterns and other food groups reinforces the conclusion that diet is not a primary driver of monoclonal gammopathy of undetermined significance risk.
Implications For Clinical Practice
These findings indicate that dietary modification alone is unlikely to influence the development of monoclonal gammopathy of undetermined significance. Future research may focus on other environmental or biological contributors to better understand disease aetiology and progression to multiple myeloma.
Reference
Hallsson S et al. Dietary intake and the risk of monoclonal gammopathy of undetermined significance: results from the population-based iStopMM screening study. Blood Cancer Journal. 2026; https://doi.org/10.1038/s41408-026-01480-4.
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