Fruit Juice & Diabetes: Genetic Factors Revealed
sweet Relief? 100% Fruit Juice May Offer Protection Against Type 2 Diabetes in Genetically predisposed Individuals
new research suggests a potential protective effect of 100% fruit juice consumption against type 2 diabetes (T2D), but this benefit appears to be significantly influenced by an individual’s genetic predisposition. A study conducted on Japanese participants found that those with a high genetic risk for T2D who regularly consumed 100% fruit juice had a lower incidence of the disease. However, this protective association was not observed in individuals with low or moderate genetic risk.
The study,which analyzed data from the Japan Multi-Institutional Collaborative Cohort (J-MICC) study,involved 13,769 participants,of whom 814 were diagnosed with T2D. Researchers utilized polygenic risk scores (PRS) to assess an individual’s genetic susceptibility to T2D. Two East-Asian specific PRS were identified, with PGS002379, encompassing 920,930 variants, being used for primary analysis due to its broader genomic coverage.
Participants’ dietary intake was assessed using a Food Frequency Questionnaire, which specifically evaluated the consumption of 100% fruit juice. For primary analysis,intake was categorized as “no intake” or “at least once weekly.” Physical activity was also evaluated.
The findings revealed that individuals diagnosed with T2D were generally older, heavier, and had longer sleep durations and lower physical activity levels compared to those without T2D. Moreover, alcohol intake, smoking, hypertension, and hyperlipidemia were more prevalent in the T2D group.
Crucially, the study observed an inverse association between 100% fruit juice intake and T2D.Participants who consumed 100% fruit juice had significantly lower odds of developing T2D, with a dose-response pattern indicating that higher consumption was linked to lower odds. This association remained meaningful even after adjusting for various confounding factors, including age, sex, site, hypertension, dyslipidemia, education, family history of T2D, physical activity, alcohol and smoking status, and sleep duration.
the most compelling finding emerged from the stratified analysis, which investigated the interaction between PRS and fruit juice intake. The protective effect of fruit juice was only evident in individuals with a high genetic risk for T2D. In contrast, no significant association was found among those with low or moderate genetic risk.
Though, the researchers caution that the cross-sectional nature of the study means that reverse causation cannot be entirely ruled out. It is indeed possible that individuals diagnosed with T2D may have reduced their fruit juice intake after their diagnosis.
this study suggests that regular consumption of 100% fruit juice may offer a protective benefit against type 2 diabetes, but this effect appears to be contingent on an individual’s genetic makeup. The observed interaction between fruit juice intake and genetic predisposition highlights the complex interplay between diet and genetics in disease advancement. While these findings are promising, further longitudinal studies are essential to confirm causality and to pinpoint the specific genetic factors that might influence the metabolic response to fruit juice components.