Abstract
In this study, we fed obese model mice black soybean seed coat powder (BSCP) and evaluated the antiobesity effects. As a control, normal yellow soybean seed coat powder (YSCP) was used. C57BL/6J, a high-fat diet-induced obesity model mouse, was fed a high-fat diet containing BSCP or YSCP (20% fat) to induce obesity. The results showed that in the BSCP group, it caused significant suppression of body weight gain and suppression of white adipose tissue weight compared with the YSCP group. Moreover, it significantly decreased serum leptin levels, which correlated with visceral fat mass, and increased antidiabetic adipocytokine and adiponectin levels. Therefore, this suggests the pigmented components contained in BSCP have an antiobesity effect in obese model mice. It is suggested that this material, which can be prepared without extraction with an organic solvent and is suitable for use as a food material, could be a functional food material with a practicable antiobesity effect.
Highlights
An increase in the number of patients with diabetes and cardiovascular diseases associated with obesity has become a social problem; the search for food ingredients that suppress insulin resistance and hyperglycemia caused by obesity and elucidation and practical application of their mechanisms of action have been widely attempted [1].Soybean has been widely used as a source of oil and protein since ancient times, but its physiological functions, such as lifestyle-related disease prevention effects, have been noted in recent decades [2]
In this study, the pigment components contained in black soybean seed coats were used as actual food ingredients and whether the pigment components of black soybean seed coats exerted effective antiobesity effects was examined by feeding obese mice black soybean seed coats that were finely crushed to a powder (BSCP) as feed, without extracting them with organic solvents, and comparing their effects to mice fed yellow soybean seed coat powder (YSCP)
The antiobesity effects of black soybean seed coat powder (BSCP), which was developed for ease of application as a food material, were evaluated
Summary
An increase in the number of patients with diabetes and cardiovascular diseases associated with obesity has become a social problem; the search for food ingredients that suppress insulin resistance and hyperglycemia caused by obesity and elucidation and practical application of their mechanisms of action have been widely attempted [1]. Soybean contains three major nutrients (proteins, carbohydrates, and fats), and a variety of functional components, including soy peptides, isoflavones, linoleic acid, linolenic acid, plant sterols, lecithin, saponins, and other nutrients, such as dietary fiber, minerals, and vitamins [2,3,4,5]. Many of these functional components have been studied; there are a few components that have been recognized as new functional components and are expected to be developed in the future [2,3,4,5]. In this study, the pigment components contained in black soybean seed coats were used as actual food ingredients and whether the pigment components of black soybean seed coats exerted effective antiobesity effects was examined by feeding obese mice black soybean seed coats that were finely crushed to a powder (BSCP) as feed, without extracting them with organic solvents, and comparing their effects to mice fed yellow soybean seed coat powder (YSCP)
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