What type of change occurs you digest your food?

The type of change that occurs would be chemical change.

The food you ate will come in contact with your stomach acid, and start to dissolve. your organs will break down your remaining food, and separate the nutrition from bad things like cholesterol, cooking oil, and fat. It will take the bad things, and separate it again into solids and liquids. I'm pretty sure you know what are the solids, and what are liquids. Ha-ha.