The Effective Dose and Pattern of Soybean Extract Administration to Regulate Body Weight of Laboratory Rats

Background: Protein in soybean, β conglycinin is responsible for anti-obesity effects by suppressing appetite via stimulation of Cholecystokinin. Cholecystokinin is a hormone released in the digestive tract in response to the intake of protein and suppress appetite for short-term. Detam 1 variety is a high-quality soybean according to the Minister of Agriculture of Indonesia. Soybean protein extract Detam 1 by Deak method contains high levels of β conglycinin. The purpose of this study was to determine the effective dose of protein extract Detam 1 soybean Deak Method (PEDSDM) in reducing food intake, regulate body weight, and plasma CCK level for 14 and 28 days at various dosage and pattern of treatment on male Wistar rats. Methods: There were eleven groups of treatment (n = 3), administrated with extracts at 5 mg/1x/day, 10 mg/1x/day, 20 mg/1x/day, 2.5 mg/2x/day, 5 mg/2x/day, 10 mg/2x/day and 1.7mg/3x/day, 3.4mg/3x/day, 6.7 mg/3x/day, negative control group (distilled water) and positive control group (Sibutramine). Food intake (g), weight loss (g) and measurement of plasma Cholecystokinin levels by ELISA (ng /ml) Results: The results showed that the highest percentage decrease in food intake is: group 3.4mg /3x/ day (p <0.05), inhibition weight gain for 14 days: group 10 mg /1x/ day, for 28 days: group 1.7 mg/3x/day (p <0.05), increased plasma Cholecystokinin levels: group 20 mg /1x/day (p <0.05). Conclusions: The effective dose and pattern administrating the rats for 14 days is extract of 10 mg once a day in the morning, for 28 days is 1.7 mg three times a day. (Health Science Journal of Indonesia 2016;7:17-26