Soy Milk Consumption in the United States of America: An NHANES Data Report

With the increasing adoption of plant-based diets in the United States, more and more individuals replace cow milk with plant-based milk alternatives. Soy milk is a commonly used cow milk substitute, which is characterized by a higher content of polyunsaturated fatty acids and fibers. Despite these favorable characteristics, little is known about the current prevalence of soy milk consumption the United States. We used data from the National Health and Nutrition Examination Surveys (NHANES) to assess soy milk usage in the United States and identified potential predictors for its consumption in the US general population. The proportion of individuals reporting soy milk consumption in the NHANES 2015-2016 cycle was 2%, and 1.54% in the NHANES 2017-2020 cycle. Non-Hispanic Asian and Black ethnicities (as well as other Hispanic and Mexican American ethnicities in the 2017-2020 cycle) significantly increased the odds for soy milk consumption. While a college degree and weekly moderate physical activity were associated with significantly higher odds for consuming soy milk (OR: 2.21 and 2.36, respectively), sex was not an important predictor. In light of the putative health benefits of soy milk and its more favorable environmental impact as compared to cow milk, future investigations should attempt to identify strategies that may help promote its consumption in selected populations.

Automated summary

With the increasing adoption of plant-based diets, more and more individuals in the United States are switching from cow milk to plant-based milk alternatives. Soy milk, a common substitute, has higher levels of polyunsaturated fatty acids and fibers. However, there is limited knowledge about soy milk consumption in the US. Using data from NHANES, this study assessed soy milk usage and identified potential predictors for its consumption. The study found that soy milk consumption was reported by 2% of individuals in the NHANES 2015-2016 cycle and 1.54% in the NHANES 2017-2020 cycle. Ethnicity, education level, and physical activity were identified as significant predictors for soy milk consumption.