Here’s the science bit. When we get ’hangry’, it’s all too easy to reach for a quick hit of caffeine or sugar – and you just know that you’ll get a 4pm slump in energy.

“For every sugar high, there can be a subsequent low,” says Allan. “As your blood sugar levels nosedive, it can bring on headaches, fatigue, pesky cravings, dizziness, and irritability. You’re left craving a quick fix – often in the form of chocolate, coffee or a fizzy cola. This gives you a temporary boost, making you feel better.

“But here’s the catch: it kickstarts a cycle of sugar levels spiking and then crashing, leaving you feeling utterly drained, hangry and not at your best.”

The theory goes that if we eat foods in a certain order, we can avoid these blood sugar surges and the dips that inevitably follow.

Eating high-fibre foods earlier in a meal has also been found to make a difference. “Scientists have known for a long time that high-fibre foods, such as salads, slow gastric emptying (the rate at which food exits the stomach),” says Professor Leonie Heilbronn in The Conversation. “So high-fibre foods slow the delivery of glucose and other nutrients to the small intestine for absorption into the blood. Proteins and fats also slow gastric emptying.”

Could food sequencing be the key to controlling blood sugar spikes?