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New research has uncovered a profound connection between the foods we eat and the health of our brains. A large study involving almost 200,000 people in the UK revealed that a balanced, nutritious diet is linked to better cognitive function and mental well-being — even increased grey matter in the brain.

Why it matters

  • Healthy eating habits from an early age are crucial for supporting brain development and preserving mental capacities over the long term.
  • Developing healthy eating habits early is vital for brain development and preserving mental capacities over the long term.

"This exciting research further demonstrates that a poor diet detrimentally impacts not only our physical health but also our mental and brain health." —Dr. Richard Pemberton, Lifestyle Physician and GP

The challenge

Adopting a healthier diet is challenging for those accustomed to tasty but unhealthy foods.

  • A key to transitioning to a healthier diet: gradual dietary changes. For example, gradually reducing sugar and fat intake can lead to healthier food choices.

"Since dietary choices can be influenced by socioeconomic status, it's crucial to ensure that this does not hinder individuals from adopting a healthy, balanced dietary profile. Implementing affordable nutritious food policies is essential for governments to empower the general public to make informed and healthier dietary choices, thereby promoting overall public health." —Professor Jianfeng Feng, University of Warwick

 

The big picture

The study, published in the journal Nature, analyzed data from the UK Biobank on participants' dietary patterns, cognitive assessments, brain imaging, genetics, and other health markers. Using machine learning, the researchers categorized individuals' food preferences into ten groups (fruits, meats, alcohol, etc.)

A closer look

  • Those eating a more varied, balanced diet demonstrated superior cognitive performance compared to those with less diverse diets high in sugars and fats.
  • A healthy diet was associated with higher volumes of grey matter — the brain tissue vital for intelligence.

The takeaway

  • This research highlights the close connection between diet and brain function.
  • Public health policy should prioritize healthy eating to support cognitive development and preserve brain health as populations age.

1 big idea

Each bite counts for brain health.

Hearing health is vital for brain health too

★ For facts about hearing loss and hearing aid options, download The Hearing Loss Guide.

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