Development of a database to estimate dietary intake of resistant starch in Koreans

We developed a database of resistant starch (RS) content of 3885 common Korean foods and used it to estimate RS intake and food sources among Koreans. To construct a database of RS content, we collected analytical, reference, calculated, imputed, and food-recipe values from independent analyses of food samples and previous studies. The constructed database was linked with 24-h dietary recall data collected from 20,631 individuals participated in the 2016-2018 Korea National Health and Nutrition Examination Surveys. The estimated RS intake of individuals aged & GE; 1 year was 3.0 g ( & PLUSMN; 0.04). For adults aged & GE; 19 years, the mean intake of RS was 3.1 g ( & PLUSMN; 0.05). Over half of RS intake came from cereal grains and their products (1.7 g), with the remainder from potatoes and starch-rich foods (0.8 g), fruits, nuts and seeds, legumes, and vegetables. Analyzing RS food sources showed that white rice accounted for approximately 20% of RS intake, followed by starch-rich foods (9.1%), instant noodles (7.6%), noodles (7.2%), banana (7.1%), sweet potatoes (4.9%), potatoes (4.3%) and breads (4.0%). Our findings will serve as basic data for developing a guideline for RS intake for Koreans and for investigating the association between RS intake and metabolic diseases.

Automated summary

We created a database of resistant starch (RS) content in 3885 common Korean foods and used it to estimate RS intake and food sources in Korea. The database was linked with dietary recall data from over 20,000 individuals. The results showed that over half of RS intake came from cereal grains, while white rice was the largest contributor.