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This recommendation is currently available in English.

About the book

Satchin Panda explains how the body's 24-hour clock influences metabolism, hormones, sleep, energy and cellular repair.

Light, food, movement and sleep are timing signals that can strengthen—or disrupt—our biological rhythm.

The big idea

Aligning daily habits with circadian biology can support metabolic health, restorative sleep, focus and long-term well-being.

Food timing
Eat with the day
Sleep rhythm
Keep regular hours
Movement
Move at the right time
The goal: live in sync with your biology

Four foundations of circadian health

1

Food timing

Eat with the day

Keep meals within a consistent daytime window and avoid habitual late-night eating.

Timing shapes metabolism.
2

Sleep rhythm

Keep regular hours

Use consistent sleep and wake times to support hormones, cognition and recovery.

Regularity reinforces the clock.
3

Movement

Move at the right time

Combine daily activity with a schedule that supports energy and performance.

Activity is a powerful time cue.
4

Light

Bright days, dim nights

Seek morning daylight and reduce bright artificial light near bedtime.

Light sets the master clock.

Key takeaway

Health is influenced not only by what we do, but also by when we do it.

Why it matters

Circadian disruption is associated with poorer sleep, metabolic strain and reduced well-being.

The result

More consistent energy, sleep and metabolic health across the day.

Original slides

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