When it comes to snacks (scratch that, when it comes to ANY kind of eating), it’s important to include some protein and, ideally, some fibre. Why? You need protein (and fibre) to keep your blood sugar stable, so you’ll have a constant supply of energy to get you through to lunch or your evening meal. There’s also the small matter of the energy crash (and, I’m sorry, weight gain) when snacks cause blood sugar to spike. Unfortunately, many of the snacks we’d routinely eat fall into this latter category – including crisps, chocolate bars and many so-called healthy granola bars. So what can you eat when you're out the house? What you pack for snack will depend on the facilities you have at work.