Acidic activated charcoal prevents weight gain and insulin resistance in high-fat diet mice | 酸性活性炭可防止高脂飲食小鼠的體重增加和胰島素抵抗

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News Release

Peer-Reviewed Publication

Shinshu University

Graphical Abstract
image: Acidic activated charcoal from Shinshu Ina Akamatsu (red pine) prevents weight gain and insulin resistance in high-fat diet mice (Zhang et al. Frontiers in Nutrition 2022 May 12;9:852767) view more 

Credit: CREDIT: NAOKI TANAKA, SHINSHU UNIVERSITY

With the westernization of eating habits, the proportion of obese people is increasing all over the world. Obesity is an urgent issue because obesity is a risk factor leading to various diseases such as diabetes, fatty liver and dyslipidemia. Edible activated charcoal is known to absorb urinary toxins and bile acids in the intestines and excrete them as feces. The research team led by Shinshu University’s Department of Metabolic Regulation suspected that they would also absorb excess fat in the diet. The group was able to verify the effect and safety of acidic activated charcoal produced from Shinshu Ina’s specialty the Akamatsu tree (red pine) on mice.

When mice were given a normal diet and a high-fat diet for 12 weeks each, the mice fed the high-fat diet gained significantly more weight than the normal diet. On the other hand, when acidic activated charcoal was mixed with a high-fat diet and given to mice in the same manner, the degree of weight gain was almost the same as that of a normal diet, meaning the weight gain due to the high-fat diet was completely suppressed. When acidic activated charcoal is administered with a high-fat diet, the amount of bile acid, cholesterol, triglyceride, and fatty acid in the stool increases about 2 to 4 times as much as when the regular high-fat diet is administered. It is thought to promote excretion into the stool. No damage to the gastrointestinal mucosa or lungs due to acidic activated charcoal was observed.

Taking acidic activated charcoal with fatty foods or before eating may prevent weight gain. Based on the knowledge gained from this research, the group hopes to promote the development of acidic activated charcoal with better efficacy and safety while collaborating with local and global companies, hoping to contribute to the prevention of lifestyle-related diseases around the world.

Making charcoal has been widely popular in Shinshu for a long time, and activated charcoal made with such technology is also used for deodorization and water purification. This research clarified that acidic activated charcoal made by processing Shinshu Ina Akamatsu, prevents weight gain and insulin resistance of mice due to a high-fat diet. By incorporating acidic activated charcoal into the diet, it may be possible to prevent obesity, fatty liver, and diabetes in people, which have been increasing in recent years. Professor Naoki Tanaka, Department of Global Medical Research Promotion, Shinshu University, and the research teams of Ina Carbonization Laboratory Co., Ltd. (Ina, Japan) and Sumi Plus Lab Co., Ltd. (Yokohama, Japan) continue to research the application of charcoal produced from Akamatsu, a specialty from the area to medical health. This research result was published in the scientific journal Frontiers in Nutrition on May 12, 2022.

 

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This study was partially supported by the Shinshu Public Utility Foundation for Promotion of Medical Sciences 2021. The authors declare that this study received funding from Sumi Plus Lab Co., Ltd. and Ina Carbonization Laboratory Co., Ltd. The funders were not involved in the study design, collection, analysis, interpretation of data, the writing of this article or the decision to submit it for publication.

 

About Shinshu University

Shinshu University is a national university founded in 1949 located nestling under the Japan Alps in Nagano known for its stunning natural landscapes. Our motto, “Powered by Nature – Strengthening our network with society and applying nature to create innovative solutions for a better tomorrow” reflects the mission of fostering promising creative professionals and deepening the collaborative relationship with local communities, which leads up to our contribution to regional development by innovation in various fields. We’re working on providing solutions for building a sustainable society through interdisciplinary research fields: material science (carbon, fiber, composites), biomedical science (for intractable diseases, preventive medicine), and mountain science, and aiming to boost research and innovation capability through collaborative projects with distinguished researchers from the world. For more information visit https://www.shinshu-u.ac.jp/english/  and follow @ShinshuUni on Twitter for the latest news.


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