Can Better Sleep Slow Aging? A 2026 UCLA Study on CBT-I and Biological Age

Sleep is not a luxury, it's foundational infrastructure for your health. Usually, the argument for getting better sleep rests on things we all can feel: mood, focus, patience, energy. But this past September, researchers at UCLA Health published findings in The Lancet Healthy Longevity journal, showing that treating insomnia with cognitive behavioral therapy didn't just improve how people slept. In their researcher, it appeared to slow down how fast their bodies were aging at the cellular level.