As I sit here after eating too much chocolate, I wonder:

What are the biological mechanisms behind eating too much candy candy causing nausea in a healthy individual? Is it a spike in blood sugar, or does the stomach run out of a particular chemical, or is it a pH shift?

Is it the same reason that greasy meals can cause nausea?

From an evolutionary perspective, candy causing nausea seems counter-intuitive since candy is easy calories. Then again, candy and concentrated carbs are modern inventions...