Study links ultra-processed foods to brain damage

A study from McMaster University in Canada found that people who regularly eat ultra-processed foods—such as snacks and ready-made meals—are 40% more likely to have small brain injuries, even if they show no symptoms or memory problems. These injuries may raise the risk of stroke and cognitive decline later in life.

Participants had no heart disease history

The research involved 8,783 adults aged 35 to 69 with no history of heart disease. They came from two large health studies in Canada: the Canadian Alliance for Healthy Hearts and Minds and the Canadian branch of the PURE-MIND project. Each person provided details about their diet from the previous year.

Brain scans showed hidden damage

Neurologists examined MRI scans of the participants' brains without knowing their dietary habits. They looked for two types of brain damage: silent micro-strokes and white matter damage, which can affect thinking and movement. These injuries are often invisible and cause no immediate symptoms.

Ultra-processed foods linked to higher risk

People who ate the most ultra-processed foods—making up 45% of their daily meals—had an 11.3% chance of having these brain injuries. In comparison, those who ate the least had an 8.1% risk. The link remained strong even after considering factors like age, smoking, and high blood pressure.

Fresh foods are declining in diets

The study found that ultra-processed foods are replacing fresh items like fruits, vegetables, and whole grains in many diets. This shift in eating habits may be contributing to the increased risk of brain damage, according to the researchers.