What's the Big Deal?

If you eat just an extra 100 calories every day over what you're burning, that adds up to 36,500 calories in a year. That's about 10 pounds of gain in one year. But that's just a 100-errant calories. It adds up over time. And it doesn't really seem day by day, especially when we look at things day by day. The math is happening whether you believe in math or not.