Why do we feel sleepy after meal?

[askhan]

It is usually seen we start feeling sleepy after meal why is it so? How it is connected to blood glucose level?

[relaxin]

After a meal, your blood is loaded into the digestive system, leaving the brain with less blood flow. So you will feel a little sleepy because of lower level of oxygen available to the brain cells. If you move around to facilitate the blood flow, you will not feel sleepy.