Does Eating in Front of a Screen Make You Snack More? What the Research Actually Shows

It is a familiar Singapore evening. You get home, put on an episode, open one packet of something crunchy, and somewhere around the second ad break you realise the packet is empty and you barely remember eating it.

The usual explanation is willpower. The research points somewhere more interesting — and more useful, because it suggests the fix is not about being stricter with yourself.

What actually happens when you eat with a screen on

The Health Promotion Board has a name for this: mindless eating. In its HealthHub guide to mindless eating, HPB describes exactly the scenario above — drama on, nasi lemak in hand, keropok afterwards — and notes that when you are distracted, you may not even register that you are reaching for food, whether or not you are actually hungry.

Part of it is timing. HPB points out that it takes roughly 20 minutes for fullness signals to travel from your gut to your brain. Harvard Health makes the same point in its guide to mindful eating: stretch receptors in the stomach and appetite hormones released further down the digestive tract both send fullness messages, but the process is slow. Eat faster than that and you can comfortably overshoot before your body has a chance to object.

The surprising part: the effect shows up later

Here is where the evidence gets more nuanced than the usual advice suggests. A 2025 systematic review and meta-analysis published in Nutrients by researchers at Western Sydney University pooled 23 experimental studies on television and food intake. Across all 57 comparisons, there was no statistically significant overall effect of watching TV on how much people ate.

When the authors narrowed it to studies that manipulated television alone — stripping out ones that also introduced advertising or toys — a small but real effect appeared. And when they split the results by timing, the picture sharpened considerably. The effect on what people ate during the screen session was small and only borderline significant. The effect on what they ate at the next eating occasion was roughly three times larger, and clearly significant — an increase of up to 22% at the following meal in some of the studies.

In other words: the show does not necessarily make you demolish that packet on the spot. It makes you hungrier later.

Why memory matters more than willpower

The mechanism the reviewers favour is not appetite at all. It is memory. When your attention is on a screen, your brain encodes the eating episode poorly. The review describes studies in which people who ate while watching television later recalled the meal less vividly — and went on to eat more biscuits at the next opportunity than people who had eaten the identical meal without a screen.

The reverse also holds. The same review notes work showing that deliberately paying attention to a meal improves how well you remember it, and reduces afternoon snacking as a result. Your body is, in a sense, keeping a running tally of what you have eaten — and distraction corrupts the record.

It is worth being honest about the size of all this. These are small-to-moderate effects, averaged across studies that varied enormously — one found a 37% reduction in intake. Screen snacking is not the single lever that decides anyone's health. But it is a real, repeatable, and unusually easy thing to change.

What HPB actually recommends

HPB's guidance on smarter snacking, written with a dietitian from Ng Teng Fong General Hospital, uses a tidy framework it calls FACT — Frequency, Amount, Calorie and Type. Two parts of it are directly relevant here:

  • Amount. Are you eating more than a handful? Eating from the packet in the dark makes this question almost impossible to answer.
  • Calorie. HPB suggests aiming for snacks under 100 calories per serving, and notes that products carrying the Healthier Choice Symbol in that category meet that bar. Note that the Healthier Choice Symbol is a separate scheme from Nutri-Grade, which currently applies to beverages, not snacks.

HPB also offers a genuinely useful gut-check: rate your hunger from 1 to 10, where 1 is extremely hungry. If you score 4 or above, you are probably not really hungry — you are bored, stressed, or simply near a packet.

Four things that actually help

  1. Portion it out before you press play. This is the highest-leverage move on the list. A bowl has an edge; a packet does not.
  2. Eat the first few mouthfuls before the show starts. Attention early in an eating episode is what gets encoded. Give your brain something to file.
  3. Out of sight, out of mind. HPB's own advice: store snacks somewhere inconvenient. Reaching is a decision point.
  4. Notice the later meal, not just the snack. If the effect really lands at the next eating occasion, that is where to pay attention — not with guilt, just with awareness.

Choose something worth remembering

If the problem is that you barely notice what you eat, one reasonable response is to snack on something with enough flavour, texture and substance to be worth noticing. HPB's own list of better savoury options includes wholemeal crackers and plain rice crackers.

That is roughly where HexaCrunch sits. Our crackers are baked, not fried, made from wholegrain brown rice, and get their protein and their savoury depth from cricket protein — which is what lets a cracker carry real protein without a long list of flavourings. They come in single packs that make the portioning decision for you. If you want to find your flavour, the Try-All 3-Pack is the easiest place to start.

Either way: the packet is not the enemy. Not knowing you finished it is.

Sources

This article is general information, not medical or dietary advice. If you have a specific health condition, speak to your doctor or a dietitian.

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