Eat more rice:

A team of researchers from the Hokkaido University Graduate School of Medicine and Tenshi College in Japan carried out a survey to analyze the dietary habits and mental and physical health of the Japanese population. The study was based on 278 individuals who were both physically and mentally healthy and at least 40 years old. The research team then evaluated the participants’ daily consumption of staple foods such as rice, rice-based foods, bread, noodles, and cereal for their three main meals: breakfast, lunch, and dinner.

The study revealed that improvements in sleep quality and overall quality of life are associated with the consumption of rice. However, noodles and bread intake did not show the same associations. Meanwhile, eating a combination of rice and miso or soybean paste soup – another Japanese dietary staple – could also improve physical and mental health.

These findings support a previous longitudinal study that looked at the changes in the Japanese diet every 15 years, from 1960 to 2005. In the previous study, it was discovered that a Japanese diet that was comprised of more rice and miso soup was mostly responsible for preventing cognitive decline. Miso contains flavonoids that help boost brain function and learning ability and improve memory.

The researchers also said that the current study indicates a link between rice intake and physical and mental health, with indirect contributions from intakes of other foods as mediators.“The foods that were associated with improvements in health were components of the traditional Japanese diet,” the researchers wrote.

Furthermore, the researchers noted that one of the factors that affect the impact of traditional Japanese diet is how long a person has been regularly consuming a particular diet. For instance, the study’s participants have been eating a traditional diet since 1975.“The contribution of the rice-centered Japanese diet to health may be explained by the effects of mediators, which are foods that have been familiar to the Japanese for a long time,” the researchers wrote.

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