Low consumption of animal products and oil tied to reduced hot flashes in postmenopausal women: Study
A low-fat vegan diet with soybean supplementation has proven effective in decreasing both body weight and hot flashes in postmenopausal women. Another study, the Women’s Health Initiative, found that increasing whole grains, fruits, and vegetables while lowering fat intake led to reduced hot flashes, especially in individuals who lost over 10% of their body weight. Recent secondary analysis aimed to assess the association between different plant-based diet indices and changes in hot flashes experienced by postmenopausal women. The study participants were randomly assigned to either a low-fat vegan diet supplemented with soybeans (n=42) or a control group (n=42) for 12 weeks. The researchers calculated three plant-based dietary indices: the plant-based diet index (PDI), the healthful plant-based diet index (hPDI), and the unhealthful plant-based diet index (uPDI). They found that all three scores increased in the vegan group compared to no change in the control group. The effect sizes were: - PDI: +9.8 (95% CI +5.8 to +13.8, p<0.001) - hPDI: +10.9 (95% CI +6.4 to +15.3, p<0.001) - uPDI: +3.6 (95% CI +0.5 to +6.6, p=0.02)
Correlation with Changes in Body Weight
The changes in all three scores were negatively correlated with changes in body weight. Importantly, the changes in PDI and uPDI were also negatively associated with changes in severe hot flashes, and these associations remained significant after adjusting for changes in body mass index. The researchers conclude that minimizing the consumption of animal products and vegetable oil may be an effective strategy to reduce hot flashes in postmenopausal women. They also suggest that the categorization of plant foods as "healthful" or "unhealthful" may be unwarranted in this context, as both the "healthy" and "unhealthy" plant-based indices were inversely associated with weight changes and vasomotor symptoms.
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