Eek. Fat.

Interesting thought of the day:

Humans carry about 10 billion to 30 billion fat cells. People who are obese can have up to 100 billion.
"If anyone of us overeats long and hard enough, we can increase the number of fat cells in our body," Fried said. "When we lose weight, we don't lose the number of fat cells."
The size of the cells shrinks, but the capacity to expand is always there.

 Read more here: http://www.cnn.com/2011/HEALTH/07/22/fat.weight.loss/