Buzz
By now, it's easy to overlook the headlines about the newest research warning that a particular food could be harmful—or alternatively, has gained a reputation as a 'superfood.' Many articles discussing food-related studies tend to follow a familiar structure: highlighting a prevalent health condition, analyzing data from long-term observational studies or biobanks, observing a potential connection between the food in question and the condition, and ultimately reminding us that correlation does not imply causation, urging healthier eating habits in the process.
Well, another study has surfaced today, tackling the age-old question of whether processed meats, in particular, could raise our chances of developing dementia.
Findings from this Study
The most recent study exploring the connection between hot dogs and brain health comes from the University of Leeds's Nutritional Epidemiology Group in the UK, and was published today in the American Journal of Clinical Nutrition.
The researchers used data gathered between 2006 and 2010 from almost 500,000 individuals aged 40 to 69 who are part of the UK Biobank. They examined whether there was any potential relationship between meat consumption and the development of dementia.
Though this isn't a new area of research, the authors assert that their study is the first large-scale investigation to track participants over time, focusing on the specific types and quantities of meat consumed and their link to dementia risk.
The findings revealed that individuals who consumed 25g of processed meat daily (roughly the equivalent of one slice of thick-cut bacon) had a 44% higher risk of developing dementia.
Key Insights from the Study Results
As with similar studies, the results should be interpreted cautiously. The findings do not provide conclusive evidence that processed meat consumption directly causes dementia. Instead, they highlight a pattern observed in the data. Additionally, this was an observational study using self-reported data from a biobank, not a controlled experiment.
Among the nearly half a million participants, 2,896 dementia diagnoses were made over an average of eight years of follow-up, with men being diagnosed at higher rates than women. Researchers also observed that those who developed dementia were typically older, less financially secure, had lower education levels, were more likely to smoke, less physically active, had a history of strokes or family dementia, and carried a gene strongly associated with dementia.
The researchers also found that individuals who consumed more processed meat tended to be male, less educated, smokers, overweight or obese, and ate fewer fruits and vegetables. They also had higher protein and fat intake, including saturated fats.
Key Takeaways
According to the study's lead researcher, Huifeng Zhang, a PhD student from the University of Leeds' School of Food Science and Nutrition:
While further research is necessary, the current evidence aligns with existing healthy eating guidelines, which suggest that reducing unprocessed red meat intake may have positive health benefits.
In other words, to definitively state that 'processed meats cause dementia,' more focused studies need to be conducted. In the meantime, it's probably wise to reduce consumption of foods we already know should be enjoyed in moderation.
