I Scanned 30 Supermarket Snacks — Here's What the Ingredients List Is Actually Hiding

I was standing in the snack aisle at Woolworths, supposedly just grabbing a muesli bar, when I ended up spending forty minutes scanning barcodes with my phone. Not because I went in looking for outrage. I was genuinely just curious about what was in things — especially the stuff with confident health claims on the front.

I wasn't expecting to find anything dramatic. I figured most snacks would be roughly what they said they were. Some of them were. But a fair few had a gap between what the front of the packet was suggesting and what the actual numbers showed. And a couple of products were genuinely better than I expected, which felt like the more interesting finding.

Here's what I turned up across about thirty products, roughly in the order I found it interesting.

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What the Scanner Actually Shows

Before getting into the findings: what I was using was Frittu's barcode scanner, which pulls in macro data from Open Food Facts, shows you a per-serving breakdown, lets you toggle to per-100g, and surfaces the full ingredients list with allergen highlights. There's also an AI ingredient analysis for Pro users that flags additives worth knowing about — I'll mention a few of those findings below. It's not a nutrition police tool. It's just information you'd otherwise have to squint at the back of the packet to find.

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The "Health Halo" Problem

This is the category that surprised me most — not because any individual product was shocking, but because the pattern was so consistent. Products that lead with words like "natural," "wholesome," or "high protein" on the front, where the numbers tell a slightly different story.

The muesli bar situation. I scanned four different muesli bar brands that all had some variation of "natural" or "real fruit" on the packaging. The sugar content ranged from 10g to 14g per bar. The 14g one — marketed as a "lightly sweetened" option — has more sugar per serve than a Tim Tam. That's not necessarily a reason not to eat it. It's just worth knowing.

The "high protein" yoghurt. One flavoured yoghurt had "high protein" in big letters on the front. Per serve: 8g of protein, 16g of sugar. A plain Greek yoghurt with no branding at all, sitting two shelves down, had 9g of protein and 5g of sugar per serve. The flavoured version costs more. This is probably the most common version of the pattern — plain products quietly outperforming their heavily-marketed neighbours.

The whole grain cracker. A cracker range with "whole grain" on the packaging, where the first ingredient listed was refined wheat flour. Whole grain flour appeared third, after palm oil. Ingredients lists are in descending order by weight, so what's first is what there's most of. Worth a quick check before assuming "whole grain" on the front means whole grain is the dominant ingredient.

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The Additives Worth Knowing About

The AI ingredient analysis flagged a few things across the products I scanned. I'll be upfront: none of these are "you'll immediately drop dead" findings. They're more "worth being aware of, particularly if you're eating this regularly" territory.

Maltodextrin showed up in a few products positioned as "natural" or "lightly processed." It's a processed starch that's legal to include in products marketed as natural, and it has a glycaemic index higher than table sugar — meaning it spikes blood glucose faster. Most people eating one product occasionally won't notice. Worth knowing if you're eating something daily.

Carrageenan came up in a couple of dairy-free alternatives. It's derived from seaweed, which sounds fine, but there's some research on gut sensitivity. Not conclusive, not alarming — but if you've got a sensitive gut and you've been wondering why a "clean" dairy-free product doesn't agree with you, it's a lead worth following.

Natural flavours appeared on more labels than I expected. It's a legal catch-all that covers a wide range of compounds — some genuinely natural, some less so — and it can mask allergens that wouldn't otherwise be listed by name. If you have specific food sensitivities, "natural flavours" is a vague entry that's worth being cautious about.

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The Genuinely Good Finds

I want to make sure this doesn't read as thirty products all being bad, because that's not what I found. A few things were better than I expected — simpler, more honest, and in some cases better value than the heavily-branded alternatives next to them.

Plain rice cakes. One no-frills rice cake brand: rice, salt. That's the ingredients list. The macros matched exactly what you'd expect. Nothing hidden, nothing added. Not exciting, but exactly what it says it is.

Tinned sardines. A can of sardines in olive oil: sardines, olive oil, salt. Around 18g of protein per serve, about 200 calories, no additives. This is the kind of product where the lack of marketing is almost the signal — it doesn't need a slogan because there's nothing to hide.

Single-ingredient nut butter. One almond butter brand: almonds. Full stop. No added sugar, no palm oil, no stabilisers. The oil separation at the top is actually a good sign — it means there's no hydrogenated fat keeping it artificially emulsified.

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The Per-100g Trick

This is the one thing I'd tell anyone who's trying to make sense of nutritional labels: switch to per-100g and compare across products using that number, not the per-serve figure.

Serving sizes are set by manufacturers. There's no requirement that they reflect how much a person actually eats. I scanned a "lower calorie" flavoured chip where the serving size was 25g — about seven chips. Per serve: 105 calories, looks reasonable. Per 100g: 420 calories, which is denser than many regular chip varieties. The per-serve number isn't wrong. It's just that nobody eats seven chips.

The per-100g toggle makes comparisons honest. If you're deciding between two products, that's the number to look at.

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What's Actually Worth Checking

Not rules. Just the four things I found myself looking at after an afternoon in the snack aisle.

• Is sugar in the first three ingredients? If so, it's a primary ingredient, not an accent
• How many ingredients are there total? Forty-plus is a signal that something's been heavily processed, even if the front says otherwise
• Does the serving size match how much you'd actually eat? If not, scale the numbers accordingly
• Are there any allergens listed that you weren't expecting? Particularly under the "natural flavours" umbrella if you have sensitivities

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The Actual Point

I didn't go looking for villains and I didn't really find any. Most of what I scanned was unremarkable — food that does what it says, with some sugar in it, because people like sugar. The more interesting finding was the gap between what the front of the packet suggests and what the ingredients list actually shows.

That gap isn't necessarily deceptive. It's mostly just marketing working as designed. But it's a gap worth knowing exists, particularly for the products you eat every day without really thinking about them. That's what a barcode scanner turns out to be useful for — not policing what you eat, but knowing what you're actually eating. Which turns out to be different from what the front of the pack says more often than I expected.