Acrylamide in Singapore Snacks: What the Browning on Your Cracker Actually Means

Leave the bread in the toaster a minute too long and you get that dark, chao ta edge. Most of us scrape it off out of habit. There is a real reason to — and it applies to a lot more than toast.

The browning that makes bread, biscuits and crackers taste good also produces a compound called acrylamide. It is one of the more genuinely useful things to understand about packaged snacks in Singapore, partly because good local data exists, and partly because the practical advice turns out to be much simpler than the science.

What acrylamide actually is

Acrylamide is not an additive. Nobody puts it in, and as the Singapore Food Agency (SFA) notes, it has nothing to do with food packaging or the environment. It forms on its own when starchy foods are cooked at high temperature and low moisture — roughly above 120°C — through the Maillard reaction, the same browning chemistry that gives roasted coffee, toast and fried food their colour and flavour.

The raw materials are already sitting in the food: reducing sugars such as glucose and fructose, plus an amino acid called asparagine. Heat them together and some acrylamide appears. According to the European Food Safety Authority (EFSA), it has almost certainly been present in cooked food for as long as humans have cooked. It was simply not detected until 2002.

SFA's rule of thumb is blunt and useful: the darker the colour, the greater the acrylamide.

What Singapore's own snack data shows

This is where it stops being abstract. A 2023 study published in the journal Foods, involving researchers from the National University of Singapore, measured acrylamide across hundreds of foods eaten locally, then split the diet into foods eaten within the three main meals and foods eaten outside them — in other words, snacks.

Two findings stand out.

First, snacking is not a rounding error. Acrylamide was detected in 80.1% of snack samples, against 32.5% of main-meal samples. Snacks eaten outside the three main meals accounted for 57.4% of total estimated acrylamide exposure for the average Singaporean — slightly more than breakfast, lunch and dinner combined. The researchers link this directly to the "snackification" of Asian diets under urbanisation.

Second, the base ingredient matters enormously. Among the crackers and chips sampled, mean acrylamide levels were:

  • Potato-based: 732.7 µg/kg — the highest of any snack category, with 41.7% of samples above the EU benchmark of 750 µg/kg for potato-based crackers
  • Biscuits and wafers: 195.7 µg/kg
  • Rice flour and dhall flour based: 113.8 µg/kg
  • Vegetable-based (corn, tapioca, taro, tortilla): 48.8 µg/kg
  • Nuts: 41.4 µg/kg

That is roughly a sixfold gap between potato-based crackers and rice-flour ones, and the reason is not brand or price. Potatoes simply carry far more of the precursors — asparagine and reducing sugars — than rice flour does.

Worth being honest about: lower is not zero. The rice and dhall flour crackers in that study still ranged up to 458.4 µg/kg. And "baked, not fried" is no exemption either — baking above 120°C forms acrylamide just as roasting does.

So how worried should you be?

This is a "reduce where it is easy" situation rather than a panic, and the major agencies genuinely differ in emphasis.

EFSA's 2015 assessment concluded that acrylamide in food potentially increases the risk of developing cancer for consumers in all age groups — based on animal studies, while noting that human studies remain limited and inconsistent. SFA puts more weight on that second half, stating that many studies, including long-term ones, have not found evidence that dietary acrylamide exposure increases cancer risk in humans. The US FDA lands somewhere similar: cancer in animals at doses far higher than those found in human food, no consistent human epidemiology, but still treated as a potential health concern.

The Singapore study calculated margins of exposure below 10,000 — the threshold regulators use to flag a substance as warranting attention — which is why nobody calls it harmless. Equally, there are no international maximum limits for acrylamide. Singapore, like Australia, New Zealand and the United States, follows the Codex "as low as reasonably achievable" approach instead, which puts the onus on manufacturers to reduce it where they can.

Four things that actually lower your exposure

  • Aim for golden, not brown. SFA advises targeting a golden yellow colour or lighter when frying, baking, toasting or roasting, and skipping the very dark parts. EFSA puts a number on it: toasting bread for five minutes instead of three raised acrylamide from about 31 µg/kg to 118 µg/kg, depending on the bread and toaster.
  • Don't refrigerate your potatoes. Cold storage raises their sugar levels, which raises acrylamide when you later cook them. Store them somewhere dark and cool instead.
  • Vary the cooking method. Boiling and steaming do not form acrylamide at all. The Singapore study found starch-rich vegetables — potato, lotus root, long bean, ginger — carried noticeably higher levels when stir-fried, roasted, deep-fried or baked.
  • Read the base ingredient, not the front of the pack. If crackers are a daily habit for you, what the cracker is made from is a far bigger lever than any claim on the front. Potato-based sits at the top of the range; rice, cereal and legume flours sit well below it.

The honest summary

Acrylamide is not a reason to fear packaged snacks, and it is not something you can eliminate — it is in coffee, bread and roasted nuts too. It is a reason to eat a varied diet, keep the very-brown stuff occasional, and pay attention to what your everyday cracker is actually made of. Conveniently, those are the same habits that help with sodium, saturated fat and fibre.

Where HexaCrunch fits

Our crackers are baked and brown-rice based rather than potato-based, which puts them in the lower-acrylamide group the Singapore data describes. We are not going to claim they contain none, because no baked starchy snack does. What they do add is protein and fibre, from cricket protein — which is where the crunch and the nutrition come from. If you want to see how a rice-based cracker stacks up against your usual packet, the Try-All 3-Pack is the easiest place to start.

Sources

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