Sleep quality linked to accelerated brain aging and dietary habits

Research and nutritional expertise highlight a strong link between sleep quality, dietary habits, and brain health. A study by the Karolinska Institute in Sweden, involving 27,500 middle-aged individuals, utilized MRI and artificial intelligence to estimate biological brain age. The findings suggest that poor sleepers—categorized by factors such as insomnia, snoring, and daytime sleepiness—exhibit brains that are, on average, one year older than their actual age.

Potential causes for this accelerated aging include low-intensity chronic inflammation, disruptions in the brain's waste elimination system, and negative impacts on cardiovascular health. To mitigate these risks, experts recommend maintaining regular sleep schedules, creating dark and cool sleeping environments, limiting screen time before bed, and avoiding caffeine late in the day.

Nutritionist Aude Bazin notes that diet and sleep are mutually influential. A breakfast containing proteins, such as eggs or dairy, can help establish healthy fatigue levels for the day. For dinner, a balance of proteins and carbohydrates is recommended; specifically, carbohydrates can aid sleep by promoting serotonin production, which serves as a precursor to melatonin. Additionally, maintaining a two-hour gap between the end of a meal and bedtime is advised to facilitate proper digestion.