Why do I get sleepy?

Like all animals, our bodies follow a 24-hour schedule known as a circadian rhythm, sort of an internal alarm clock that keeps time by tracking light and darkness.

Why Do You Get Sleepy After Eating? - Amerisleep

Why Am I So Tired? Top 10 Reasons – Hydrant

These 3 moves will make you stop feeling sleepy at work

Why You Get Tired and Sleepy When You're Sick - Sleep Advisor

Tired all the time? It could be because of infections and

Why Do I Get Tired After Eating? Foods to Avoid

Why Do I Feel Tired After I Eat?

Medical and Brain Conditions That Cause Excessive Sleepiness

This is why you feel sleepy - Carrot-Top Drugs Limited

Why Am I So Tired in the Afternoon? A Sleep Doctor Explains