The zen of fasting

The brain is the SUV of organs—guzzling huuuge amounts of calories to keep humming. So when you start fasting, your body scrambles to feed the pig of a brain. First, the trusty liver pumps out its supply of glucose; when it runs out after 24 hours, the body starts breaking down its fat and protein.

All this scrambling to feed the electrically charged fat pus (that's what my liver calls my brain) changes the composition of the blood rapidly, causing the brain to go bloop! and experience the clarity and the sense of peace that people who fast describe.