What Is Maltodextrin Doing in My Snack? A Singapore Label-Reading Guide

What Is Maltodextrin Doing in My Snack? A Singapore Label-Reading Guide

Flip over almost any packet in the biscuit aisle at FairPrice or Cold Storage and you will eventually find it: maltodextrin. It sits in the ingredients list looking vaguely scientific, usually near the middle, and most shoppers scroll straight past it. It is not a sweetener you recognise, not an E-number, and not an allergen — so it slips through unquestioned.

It is worth a second look. Maltodextrin is one of the most widely used ingredients in packaged food, and how Singapore regulators classify it is genuinely surprising.

What maltodextrin actually is

Maltodextrin is a starch hydrolysate. Manufacturers take a starch — usually corn, tapioca, potato or wheat — and break it down partway using enzymes or acid. The result is a white, near-tasteless powder made of glucose chains that are shorter than starch but longer than table sugar.

That "partway" matters. Maltodextrin is not a whole food ingredient and it is not quite a sugar. It sits in between, which is exactly why it is so useful to food manufacturers and so easy for shoppers to overlook.

Why it ends up in snacks

Maltodextrin does several jobs at once, which is rare for a single ingredient. It bulks out a product cheaply. It carries flavour and seasoning powders so they cling evenly to a cracker or crisp. It stands in for fat in reduced-fat products, giving a creamy mouthfeel without the oil. It stops powders clumping. As the authors of a 2012 PLOS ONE study noted, polysaccharides like maltodextrin are added to food specifically as emulsifiers, stabilisers and bulking agents, and their use has climbed steadily in Western-style diets.

In practical terms: if a snack is marketed as low-fat, "lightly seasoned", or as a powder-coated product, maltodextrin is a strong bet.

The Singapore quirk: it counts as a sugar

Here is the part most shoppers do not know. In the Singapore Food Agency's Guide to Food Labelling and Advertisements, the definition of "sugars" used for the sugar-free claim on special purpose foods explicitly includes starch hydrolysate, glucose syrups and maltodextrin — alongside dextrose, fructose, sucrose and lactose.

In other words, our own regulator does not treat maltodextrin as a neutral filler. For the purposes of that claim, it groups it with the sugars. That is a useful mental model to carry into the supermarket: when you see maltodextrin high up an ingredients list on a product positioned as "less sweet" or "lighter", it is reasonable to read it as an added refined carbohydrate rather than as a harmless thickener.

What the gut research does — and does not — show

This is where honesty matters more than a headline. Maltodextrin has been studied fairly intensively, but mostly in laboratories and animals, not in ordinary people eating ordinary snacks.

The 2012 PLOS ONE work by Nickerson and McDonald at the Cleveland Clinic found that maltodextrin enhanced biofilm formation and adhesion of a Crohn's-disease-associated E. coli strain to human intestinal cell layers in vitro. A follow-up 2022 paper in Frontiers in Immunology from the same group examined maltodextrin's effect on the intestinal mucus barrier in mice. Both are legitimate findings. Neither is a study of humans eating crackers.

A more directly relevant paper is a 2022 systematic review in the European Journal of Nutrition by Almutairi and colleagues. Because maltodextrin is so often used as the "inert" placebo in nutrition trials, the researchers reviewed 70 randomised controlled trials that used it that way. They found that 60% of those trials reported measurable physiological, microbial or microbiome effects from the maltodextrin itself — including shifts in Bifidobacterium and Lactobacillus. Their conclusion was cautious and specific: maltodextrin is probably not a valid placebo. They did not conclude it is dangerous.

So the fair summary is: maltodextrin appears to be biologically active rather than inert, the doses and populations studied vary enormously, and the direction of the effects is inconsistent. It is a reason to pay attention to how much of it you eat, not a reason to panic about a single packet.

How to spot it on a Singapore packet

SFA requires every prepacked food sold here to carry a complete statement of ingredients, listed in descending order by weight. That ordering is the most useful tool you have.

  • Check the position. Maltodextrin in the top three ingredients means it is a structural part of the product, not a trace processing aid.
  • Read carbohydrates, not just sugars. Maltodextrin contributes to total carbohydrate. A low "of which sugars" figure does not mean a low refined-carbohydrate product.
  • Be extra sceptical on "low fat". Fat removed from a snack has to be replaced by something for texture, and maltodextrin is a common answer.
  • Compare within a category. Two rice crackers on the same shelf can differ substantially in how far down the list maltodextrin sits — or whether it appears at all.

The honest bottom line

Maltodextrin is not poison and it is not a scandal. It is a cheap, functional, refined carbohydrate that makes processed snacks work, and Singapore's own labelling guidance treats it seriously enough to count it under the sugars definition for sugar-free claims. Knowing that turns a meaningless word on a packet into a genuinely useful signal about how processed a snack is.

The most reliable move is not to memorise ingredient names. It is to lean towards snacks with shorter lists, where the first ingredient is something you would recognise as food.

That is roughly the standard we hold ourselves to at HexaCrunch. Our baked brown-rice crackers start with wholegrain brown rice and cricket protein for a bit of protein and fibre, with a short ingredients list you can read without a chemistry degree. If you want to see how they compare to what is already in your pantry, the Try-All 3-Pack is the easiest place to start.

Sources

Back to blog