Dementia Cases and Dietary Insights
Each year, over 10 million new dementia cases emerge, translating to a diagnosis approximately every 3.2 seconds, according to estimates from Alzheimer’s Disease International (ADI).
This diagnosis brings immense personal heartache for both those affected and their families. Moreover, ADI projects that the global cost associated with dementia could balloon to $2.8 trillion by 2030, accounting for both direct medical expenses and informal caregiving costs. In light of this troubling trend, recent research presents a promising angle: following an AI-curated diet might significantly reduce the risk of developing dementia.
In early July, a group of researchers from Shanghai shared their findings in the journal Nature Human Behaviour. Their study focused on identifying dietary patterns that could potentially delay the onset of dementia or slow down related brain changes.
The researchers noted that while past studies have made strides in this area, they often suffer from limitations like small sample sizes or short follow-up durations. This is especially concerning given the lengthy preclinical phase of dementia.
To address these gaps, the team utilized data from the UK Biobank, which kept track of 24-hour food intake from 185,012 participants and followed up on their dementia status over an average span of 10 years.
The scientists then performed a thorough analysis to pinpoint food groups linked to new dementia cases among this large cohort. Utilizing machine learning, they ranked the significance of various food groups in predicting dementia risk and developed a brand-new dietary pattern aimed at preventing the disease.
They compared this new dietary blueprint with the well-known MIND diet, which was introduced in 2015 and is designed to promote healthy brain aging. Essentially, they looked into which dietary approach might be more effective in combatting dementia.
The results indicated some well-known nutritious foods could lower dementia risk. For instance, green leafy vegetables, citrus, and berries were highlighted as beneficial, with grapefruit shown to correlate with a reduced risk. Similarly, sweet peppers and tomatoes also came out favorably. The consumption of potatoes, eggs, olive oil, and poultry was encouraged, with specific daily intake guidelines provided.
Conversely, the research identified certain foods, like sweetened beverages, as likely contributors to elevated dementia risk.
From these findings, the study proposed a dietary pattern called the “Machine learning-assisted Optimizing Dietary intERvention against demeNtia risk,” shortened to MODERN diet. This approach consists of seven components centered around the themes of adequacy, moderation, and restriction.
Foods were categorized based on how much of each one people should ideally consume. For example, olive oil was placed in the adequacy category, suggesting that higher consumption may lower dementia risk. In the moderation section, the study advised balancing intake of leafy greens, berries, citrus, potatoes, eggs, and poultry. Unsurprisingly, sweetened beverages were marked for restriction, indicating they should be avoided.
The MODERN diet shares several recommendations with the MIND diet while also introducing some key updates.
The researchers pointed out that while the MIND diet suggested higher intakes of green leafy vegetables and poultry, the MODERN diet recommends a more moderate consumption. Additionally, it includes citrus fruits alongside berries in the fruit category, acknowledging their rich plant polyphenol content, which may enhance cognitive function by combating oxidative stress.
It’s important to notice how the term “moderate” is applied here. The researchers emphasized that excessively high intakes of these foods could potentially increase dementia risk. They suggest a “balanced” diet, derived from hierarchical clustering, relates positively to cognitive functions.
Interestingly, fish, a component of the MIND diet, was absent from the MODERN dietary suggestion. The authors noted that fish didn’t seem to impact dementia risk in their cohort, possibly because, in the UK, it’s often fried, which might have skewed the outcomes.
This variability leads the researchers to call for additional studies to validate this dietary pattern across diverse populations and assess its practical application in clinical and public health settings. If future research backs these findings, the MODERN diet may prove even more effective than its predecessor in lowering dementia risk.
