Mystery #1Tier 2carbohydrates / energy
Why does a sugary snack give you a quick burst of energy, then a slump?
Wolf down a chocolate bar and, minutes later, you feel like you could run a mile. Half an hour after that, you feel like flopping on the sofa instead. The very same snack gave you a rocket boost and then dropped you flat. What is going on inside you?
Your guess
What do you reckon makes sugar such speedy fuel?
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