Watching more than 4 hours of TV daily raises the risk of cognitive decline
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By Dr. Sanchari Sinha Dutta, Ph.D. Reviewed by Lauren Hardaker Sep 17 2025 New research shows that watching over 4 hours of TV daily increases the risk of cognitive impairment and may be linked to dementia, highlighting a major public health concern. Study: Television watching and cognitive outcomes in adults and older adults: A systematic review and dose-response meta-analysis of observational studies . Image credit: Proxima Studio/Shutterstock.com A recent systematic review and meta-analysis
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