Sugar and Energy Crashes: What’s Really Going On

The mid-afternoon energy crash often gets blamed vaguely on ‘sugar,’ but the actual mechanism is more specific than that.

The blood sugar rollercoaster

A meal or snack high in refined carbohydrates and low in protein or fibre causes a fast rise in blood sugar, followed by an equally fast drop — which is what produces the crash and renewed hunger shortly after.

Why pairing matters

Adding protein, fat, or fibre to a carbohydrate-heavy meal slows digestion and blunts that spike, leading to steadier energy rather than a sharp rise and fall.

A practical fix

Rather than eliminating carbohydrates, pairing them with a protein source — fruit with nuts, toast with eggs — is usually enough to smooth out the crash without needing a restrictive approach.