How come warm milk puts people to sleep?

Question

How come warm milk puts people to sleep?

Answer 1

the natural seditive effect of triptophane causes sleepiness. It is released in warmed milk.

to add more seditive effect put some nutmeg in the warm milk and it is twice as potent!

Answer 2

Warming the milk releases tryptophan which naturally makes you sleepy. Also the warmth helps a bit...

Answer 3

There is a tryptophan amino acid in milk that contributes to a sleep state in the brain.