#Japan #Tokyo #Kyoto University #Sushi #Zensho Holdings

The Positive Effects of Sushi on Blood Sugar Levels

Zensho Holdings, under the leadership of CEO Yohei Ogawa, partnered with Kyoto University to conduct groundbreaking research on how sushi affects postprandial blood sugar levels. This research was presented at the 72nd Annual Meeting of the Japanese Society of Food Science and Technology held from August 27 to 29, 2025. The study explored the simultaneous intake of carbohydrates and protein, focusing specifically on sushi—a quintessential representation of Japanese cuisine.

Overview of the Study

Involving 30 healthy participants aged between 18 and 25 years (16 males and 14 females), the research aimed to determine the effects of sushi consumption. Participants were divided into groups and were fed either 12 pieces of sushi or 12 pieces of sushi rice alone (shari) to observe variations in their post-meal blood sugar levels. Additionally, the research examined the impact of the order in which sushi ingredients (neta) and rice were consumed by introducing half portions of sushi rice. Key outcomes of the findings revealed that:

1. Blood Sugar Control: Consumption of sushi significantly suppressed post-meal blood sugar levels when compared to the ingestion of sushi rice alone.
2. Combination Effect: The simultaneous intake of carbohydrates (sushi rice) and protein (sushi topping) was effective in managing blood sugar levels, similar to cases where protein was consumed first.

This study signifies the first report unveiling the relationship between sushi consumption and blood sugar management and offers new insights into the health benefits of sushi as a dietary choice.

Results at a Glance

The data revealed that when participants consumed sushi, their blood sugar rise was moderated, creating a potentially healthier eating alternative for those monitoring their carbohydrate intake. This opens the door for sushi lovers to enjoy this traditional Japanese dish without fearing a spike in blood sugar levels, provided that they consider their selection and consumption method.

Zensho’s Commitment to Healthy Eating

Zensho Group emphasizes its commitment to alleviating global hunger and poverty through nutritional innovation. The company operates Zensho Healthy Lab, dedicated to researching the health benefits of foods while promoting enjoyment in eating delicious meals without compromise. They market 'Low-Carb' certified products, which facilitate gradual carbohydrate restriction, ensuring a wider audience can enjoy sushi and similar offerings healthily.

By focusing on essential nutrients such as protein and ensuring adequate vegetable intake, Zensho is deepening its research and development practices based on scientific insights related to food and health.

Expert Insight: Professor Yuka Hayashi

Professor Yuka Hayashi from Kyoto University underscored the importance of blood sugar management in relation to cardiovascular health. The inner endothelial cells of the blood vessels, which can be damaged by prolonged high blood sugar, require monitoring to maintain overall health. Recommendations for effective management include 'vegetable-first' and 'meat-first' eating habits. This study reassures sushi aficionados that they can enjoy sushi as intended, without separating the rice and toppings—a complete meal that is both delicious and beneficial.

Understanding Blood Sugar Terms

• - Blood Glucose: The sugar present in the blood.
• - Blood Sugar Control: Maintaining blood glucose levels within a normal range to prevent conditions like diabetes.
• - Postprandial Blood Sugar Level: The amount of blood sugar present after eating, typically rising after a meal.

In conclusion, Zensho’s research opens up a promising avenue for further studies into the health benefits of traditional Japanese foods, particularly sushi, and stands as a testament to their dedication to combining culinary enjoyment with health consciousness.