Alzheimer’s disease is one of the biggest health challenges facing older adults around the world. The condition slowly damages the brain, leading to memory loss, confusion, and difficulty carrying out everyday activities.
Over time, people with Alzheimer’s disease may struggle to recognize loved ones, make decisions, or live independently. Although age is the biggest risk factor, scientists believe the disease develops because of a complex mix of genetics, lifestyle habits, and environmental influences.
Researchers have spent many years searching for ways to reduce the risk of Alzheimer’s disease. While there is currently no cure, growing evidence suggests that diet may play an important role in protecting brain health.
A study from researchers at Rush University has now added to this evidence by suggesting that strawberries may contain natural compounds that help reduce some of the harmful brain changes linked to Alzheimer’s disease.
The research focused on a natural plant pigment called pelargonidin. This compound gives strawberries their bright red color and is also found in other fruits such as raspberries, blueberries, blackberries, cranberries, plums, pomegranates, and red radishes.
Scientists have long been interested in pelargonidin because it has antioxidant and anti-inflammatory properties. Antioxidants help protect cells from damage, while anti-inflammatory compounds may reduce harmful inflammation that is linked to many chronic diseases.
Previous studies have suggested that people who consume more foods rich in pelargonidin tend to have better cognitive function and may have a lower risk of developing dementia. However, researchers wanted to know whether this compound was directly linked to changes inside the human brain that are associated with Alzheimer’s disease.
To investigate this question, the research team analyzed information from 575 participants in the Rush Memory and Aging Project. The participants had an average age at death of about 90 years, and around 70% were women.
During their lives, they provided detailed information about their eating habits through food questionnaires. After death, their brains were carefully examined by scientists.
One of the main features of Alzheimer’s disease is the buildup of abnormal proteins in the brain. Two of the most important are amyloid-beta plaques and tau tangles.
Tau is a protein that normally helps support the structure of nerve cells and assists with the movement of nutrients inside them. In Alzheimer’s disease, tau proteins can become tangled together, disrupting the normal function of brain cells and contributing to their decline.
The researchers discovered that people who consumed the highest amounts of pelargonidin from berries had lower levels of amyloid-beta buildup and fewer tau tangles than those who consumed the lowest amounts. This finding suggests that the compound may be linked to healthier brain aging.
The team also looked at the influence of genetics. They examined whether participants carried a gene known as APOE ɛ4, which is one of the strongest known genetic risk factors for Alzheimer’s disease. People who inherit this gene have a higher chance of developing the condition during their lifetime.
Interestingly, among people who did not carry the APOE ɛ4 gene, higher intake of strawberries and pelargonidin was associated with fewer tau tangles in the brain. However, the same relationship was not observed in people who carried the high-risk gene. This suggests that genetics may influence how strongly diet affects brain health.
At first, overall berry consumption alone did not appear to be directly related to Alzheimer’s disease changes in the brain.
However, when the researchers excluded participants who already had dementia or mild cognitive impairment before entering the study, a clearer pattern emerged. In this group, higher strawberry and pelargonidin intake was linked to fewer tau tangles.
The findings suggest that pelargonidin, one of the key natural compounds found in strawberries, may help protect the brain from some of the biological changes associated with Alzheimer’s disease.
While the study does not prove that eating strawberries can prevent dementia, it adds to growing evidence that certain fruits may support long-term brain health.
Scientists caution that more research is needed to understand exactly how pelargonidin affects the brain and whether increasing intake can reduce Alzheimer’s risk.
Nevertheless, strawberries are already known to be a nutritious food rich in vitamins, fiber, and beneficial plant compounds. Including them as part of a balanced diet may offer another reason to enjoy this popular fruit.
The study was published in the Journal of Alzheimer’s Disease and was led by Dr. Julie Schneider and colleagues.
If you care about Alzheimer’s disease, please read studies about vitamin D deficiency linked to Alzheimer’s and dementia, and strawberries can be good defence against Alzheimer’s.
For more health information, please see recent studies about foods that reduce Alzheimer’s risk, and oral cannabis extract may help reduce Alzheimer’s symptoms.
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