Video: Moving through the stages of sleep

Sleep comes in two different forms: REM (dreaming) and non‑REM (quiet) sleep. In quiet sleep, your brain shifts from chaotic awake activity into calm, rhythmic waves as if a switch has been flipped. In a healthy night, you glide through three deepening stages of non‑REM (N1, N2, N3 slow‑wave sleep) before diving into vivid REM dreams.

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Harvard study links ultra-processed foods to higher rates of cognitive decline, dementia

A major Harvard study adds more evidence that a healthy diet may protect your brain. Older adults who ate the most ultra-processed foods were found to have substantially higher risks of dementia and cognitive decline, while those eating more minimally processed foods had lower risks.

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A guide to the DASH diet

The DASH diet is a flexible, science-backed eating plan proven to lower blood pressure, while also reducing risks of heart disease, diabetes, cancer, and cognitive decline. Emphasizing vegetables, fruits, whole grains, and low-fat dairy products, it’s a healthy way to eat that suits almost everyone.

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