The Mediterranean Diet could cut Dementia Risk by Almost 25%

A ground-breaking study, conducted by a team of scientists from leading universities in the UK, Australia, and Sweden, has revealed compelling evidence that the Mediterranean diet can significantly reduce the risk of developing dementia. Led by Dr. Oliver Shannon, a lecturer in nutrition and aging at Newcastle University, the study, published in BMC Medicine, is the largest of its kind to date.

To investigate the potential protective effects of a Mediterranean diet against dementia, the researchers analysed data from 60,000 British individuals over a decade.

The study utilized information from the UK Biobank, a well-known resource for health research, to measure participants' adherence to a Mediterranean diet and to track the incidence of dementia. The results were remarkable. Those individuals who followed the Mediterranean diet had a substantially lower risk of developing dementia. On average, individuals closely following the Mediterranean diet enjoyed a 23% lower risk compared to those who did not. Even individuals with a higher genetic risk for dementia experienced a similar reduction in risk.

The Mediterranean diet emphasizes the consumption of fruits, vegetables, legumes, pulses, whole grains, fish, and olive oil. Moderate amounts of dairy, such as cheese and yogurt, as well as small quantities of meat are also included.

The study identified several key components of the Mediterranean diet that exhibited the most potential for protection against dementia. Notably, the use of olive oil as the main cooking fat emerged as a crucial factor in promoting brain health. Additionally, the diet highlighted the importance of consuming at least 400g of vegetables per day (with a portion consumed raw or as salad), at least 240g of fruit per day, limited red or processed meat (less than 100-150g per day), restricted butter or margarine (less than 12g per day), and limited intake of sweet, fizzy drinks.

It’s important to note that the protective effects against dementia were not attributed to any single food alone but rather to the synergistic combination of various components of the Mediterranean diet. The abundance of fruits, vegetables, whole grains, healthy fats, and reduced consumption of processed foods and olive oil appear to play a significant role in maintaining brain health.

While the exact mechanisms underlying the relationship between the Mediterranean diet and dementia prevention are not yet fully understood, numerous studies have highlighted a wide range of benefits of the Mediterranean diet – it has been associated with a lower risk of chronic conditions like cardiovascular disease and type 2 diabetes, which are known risk factors for dementia. The anti-inflammatory properties and the presence of compounds in the foods included in the Mediterranean diet may also directly benefit brain health by protecting against cell damage.

While adopting a healthy diet from a young age can contribute to a healthy brain later in life, even small changes to one's diet in later years can provide protection against dementia.

You can find the published article, "Adherence to a Mediterranean diet is associated with a lower risk of later-life dementia: findings from a British population-based cohort" here.

If you’re interested in further information on dementia and related research, you can visit the Alzheimer's Research UK website here.