Intro: Jet lag hits everyone differently, but the causes are simple.
1. Crossing time zones
Your body clock needs time to adjust.
2. Poor sleep on the plane
Light and noise disrupt rest.
3. Dehydration
Flying dries you out.
4. Late‑night arrivals
Arriving at night makes adjustment harder.
5. When to reset
Sunlight helps your body adjust faster.
Summary: Most jet lag comes from time zone changes and poor sleep.