
1. Why We Sleep
Matthew Walker
Key Takeaways
- Sleep is not a luxury—it is one of the body’s most powerful healing mechanisms.
- Deep sleep strengthens memory, immune function, emotional resilience and tissue repair.
- Poor sleep increases the risk of heart disease, diabetes, obesity, depression and Alzheimer’s disease.
- Sleep quality influences pain perception, inflammation and recovery from illness.
- Even small improvements in sleep can have profound effects on long-term health.
Why I’m Recommending It
As a dentist, I see every day how sleep affects oral and overall health. Poor sleep contributes to clenching, TMJ disorders, dry mouth, periodontal disease, delayed healing and even how our bodies respond to inflammation.
This book changed the way I think about sleep - not simply as “rest,” but as one of the body’s most powerful forms of medicine. If there’s one lifestyle change that consistently improves almost every aspect of health, it’s getting better sleep. And good dentistry can play a huge role in you getting good sleep!



