Scientific studies link lifestyle, diet, and environment to mental health

Recent scientific studies have provided diverse insights into factors affecting mental and cognitive health. A large-scale international study involving over 10,000 participants found that gratitude practices, such as sending thank-you messages, can provide immediate mood boosts, though their impact on long-term life satisfaction is minimal. The effectiveness of these practices varies significantly by geography, showing strong results in Mexico but little effect in Norway.

Research into dietary interventions shows promise for specific demographics. A systematic review suggests that prebiotics and probiotics may improve memory, attention, mood, and sleep quality in healthy adults over 60. Additionally, a meta-analysis on creatine monohydrate as a supplement for depression yielded mixed results; while some studies showed improvement when combined with antidepressants like escitalopram, others found no measurable effect.

Environmental and molecular factors also play critical roles. Researchers at Jilin University identified that the plant-derived compound 5-O-Methylvisammioside (MeV) may mitigate depressive behaviors by targeting the Src protein to reduce inflammation. Meanwhile, a study from the University of Southern California linked air pollution to accelerated brain aging, finding that increased exposure to fine particulate matter (PM2.5) is associated with cortical thinning in older women, effectively aging the brain by 13 months per µg/m³ of exposure.