Last day of the refined sugar fast!
I have a more complete picture now about what kinds of sugar is in what foods, both inherently and commercially. In terms of healthiness, my big lesson is that the natural sweeteners all have pretty similar effects on your body; for example, honey and high fructose corn syrup are pretty much the same, health-wise. In that sense, the worthy goal is just to eat them sparingly.
There are definitely environmental, economic, and other reasons to choose some forms of sugar over others. I'm going to stay away from corn syrup for the time being. Anyone know a brand of ketchup that doesn't have corn syrup in it?
Some good websites:
Great primer on glycemix index and glycemic load. Good reading about GI, GL, and different kinds of carbs. Super-long table of GI and GL for different foods