Tempted by snacks before bed? Here’s why – and what you can do about it

You have dined and yet just thirty minutes later, you are rummaging through the kitchen cabinets for snacks. This scenario is not uncommon. Studies indicate that around one-third of individuals engage in nighttime snacking – for those aged 18-24, this number jumps to eight out of ten. Dietitian Dr Kristine Beaulieu warns that such behavior can be detrimental, citing research that links late-night eating to increased weight gain and obesity.

So, why do evening cravings occur so frequently? And what steps can you take to curb them? Appetite tends to peak in the evening, even though we go longer without food while sleeping. Research suggests a key reason is that our "hunger hormone" ghrelin is generally higher later in the day. While ghrelin is suppressed after the first meal of the day, it remains elevated later on.

Another factor is the type of food consumed. Meals high in protein, fiber, and volume tend to keep us feeling full for longer. Without a nutritious or satisfying evening meal, a "crash" may occur later, leading to snacking. For some, the fear of waking up hungry during the night also motivates nighttime snacking. Habitual behavior also plays a role.

Sweet treats are particularly tempting later in the day. Research shows our appetite for calorie-dense foods like high-fat items increases compared to low-fat foods. The brain's reward system drives this preference for high-fat foods, often overpowering feelings of fullness. Even after a substantial evening meal, foods rich in sugar, fat, or salt can continue to stimulate these reward pathways, explaining why many people reach for more.

The impact of late-night snacking on sleep is unclear. While large meals late can disrupt digestion and the body's natural sleep preparation, the relationship between snacking and sleep is complex. Some studies suggest high-sugar, high-carbohydrate snacks may be linked to poorer sleep quality, possibly due to significant blood sugar fluctuations and altered sleep-regulating hormones.

However, individual responses to late-night snacking vary, making definitive conclusions challenging. To snack more healthily, first identify what triggers the habit. If hunger is the cause, focus on making earlier meals more filling. For habitual snacking, changing routines and planning snacks in advance can help. While it's not necessary to eliminate evening snacks completely, choosing healthy options like fruit, yogurt, or nuts can be more sustainable.

Moderation is key – enjoying a small amount of a desired treat occasionally is acceptable. Having healthier alternatives readily available, such as fruits, yogurt, or nuts, can make the healthier choice easier. Giving in to cravings occasionally is fine too, as long as healthier options are prioritized.