Half an hour after finishing a can of soft drink, your blood sugar has spiked.

So you’re probably feeling pretty good. Your cells have plenty of energy, more than they need.

Maybe that soft drink had some caffeine as well, giving your central nervous system a kick, making you feel excitable, suppressing any tiredness you might have.

But a clever new study, published Monday, nicely illustrates that while you’re feeling good, strange things are going on inside your blood vessels – and in the long run they are not good for you.