(P32-015-23) Comparison of Brown Rice and Soy Milk on Blood Cholesterol Level Above BMI 35

Objectives: Many Japanese believe that brown rice has a cholesterol-lowering effect on blood cholesterol. soymilk proteins and peptides have been reported to lower serum cholesterol. The purpose of this study was to investigate the compere of brown rice intake or soy milk intake for each 3 months on over BMI 35.

Methods: Seven top level male Sumo wrestling player as volunteer who belong to college Sumo association in Japan (mean ± SD; height 172.4 ± 5.3 cm; weight 109.4 ± 24.5 kg; BMI 37 ± 9.6 kg/m²) participated in this study. After three months on a diet of brown rice, the patients stayed on a normal diet for one year, after which they consumed three months soy milk. Brown rice intake was 5 Kg per month cooked with white rice. Soy milk (goods on the market, Kikkoman Soy Foods Co.) was consumed 200 ml every morning for 3 months. It was performed the blood test, cholesterol, ALT and γ-GTP before and after each intervention period. This experiment approval in Jissen Women’s University ethical committee (H2022-13). In each statistical analysis, probability values below 0.05 were regarded as significant. The data were compared by the Statistical Analysis System (SAS Institute, Inc.).

Results: There were no significant difference in BMI between before and after brown rice and soy milk feeding periods.

The test results before and after the soy milk intake intervention were as follows ( mean ± SD; before brown rice control, brown rice, before soy milk control, soy milk): CHOL(168.9±25.2, 178.7±8.0, 184.8±22.9, 175.8±25.5 ), ALT(70.3±50.7, 94.3±61.8, 131.0±110.8, 82.7±53.4) and γ-GTP(50.9±34.9, 60.0±36.9, 81.5±47.1, 66.5±46.8). There were no significant different between before and after brown rice and soy milk in blood tests.

The mean value of liver function test results also decreased periods of soymilk was consumed.

Conclusions: Consequently, this study has limitation as free feeding brown rice/soy milk and monitoring the physical activity. Therefore, the judgment result of BMI is showed over obese class II according to Japanese setting data. These results illustrated that soy milk dairy consumption may have a effect on cholesterol and liver function than brown rice. Moreover this study was suggested that the bioavailability of isoflavones from soybeans varies according to the type of processing as soy milk.

Funding Sources: None