A recent study has unveiled a potential link between exposure to air pollution, the risk of developing dementia, and the levels of certain nutrients in the blood. The research, published in the journal Neurology, suggests that individuals with blood certain concentrations of vitamin B related amino acids (Homocysteine and Methionine) may be more susceptible to dementia after exposure to air pollution.

The study, led by a team of researchers, analyzed data from over 2,500 adults participants aged 60 and above. The participants’ blood samples were examined for levels of certain amino acids, while their exposure to air pollution was assessed using their residential history and air quality data.

The findings revealed that the risk of dementia increased by approximately 70% for every 1 µg/m3 increase of PM2.5 exposure. They also found that about half of the increased risk of dementia due to PM2.5 was due to an interaction between air pollution and high homocysteine levels or low methionine levels. This aligns with previous studies that have linked air pollution to an increased risk of neurodegenerative diseases.

However, the researchers emphasized that their findings are observational and do not establish a cause-and-effect relationship. Further research is needed to confirm these findings and to understand the underlying mechanisms that link air pollution, nutrient levels, and dementia risk.

The study’s findings could have significant implications for public health, particularly in areas with high levels of air pollution. If confirmed, they could lead to new strategies for preventing dementia, such as dietary interventions or air quality improvements.

This study and many more provide insights into the complex relationship between air pollution, nutrient levels, and dementia risk. It is not only our lungs that suffer from air pollution but our brain too. It highlights the potential role of vitamin B related amino acids in protecting against the harmful effects of air pollution on the brain, and underscores the importance of further research in this area.