Read a UK sweet's ingredient list and you'll almost always see "glucose syrup." Read an American one and it's often "corn syrup" or "high fructose corn syrup." They're related, but not quite the same thing — and the difference says more about regulation and farming than about the sweets themselves.
The basic relationship
All corn syrup is a type of glucose syrup, but glucose syrup isn't always corn syrup — it can also be made from wheat, potatoes or rice. In UK confectionery, glucose syrup is most commonly wheat-derived, which is also why some "glucose syrup" ingredients carry a gluten warning on UK sweet packaging even though the word "corn" never appears.
Why the US leans on corn, and the UK doesn't
The difference comes down to what's cheap and abundant locally, plus regulation. Corn is abundant and heavily subsidised in the US, making high fructose corn syrup (HFCS) — typically 42% or 55% fructose — the default cheap sweetener there. In the EU and UK, glucose-fructose syrup production was historically capped by regulation (limited to around 5% of total sugar production until the rules changed in October 2017), and fructose content in what's used is generally much lower than US HFCS. UK manufacturers have also tended to favour sucrose — ordinary cane or beet sugar — for bulk sweetening alongside lower-fructose glucose syrup, rather than reaching for a high-fructose corn-based syrup.
The numbers make the gap obvious
The practical difference in consumption is striking: the average UK person eats around 0.38kg of high fructose corn syrup a year, against roughly 24.78kg for the average American — more than 60 times as much. If you've heard HFCS blamed for various US dietary health concerns, that's largely why it's not the same conversation in the UK: it's simply not a significant part of the British diet, glucose syrup is.
Why it's on the label at all
Glucose syrup does the same practical job in a sweet whichever plant it comes from: it controls crystallisation, adds chewiness and helps sweets hold their shape, which is why it turns up in gummies, chews and boiled sweets across pretty much every UK confectionery brand.
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Frequently asked questions
Is glucose syrup the same as corn syrup?
Not quite — all corn syrup is glucose syrup, but UK glucose syrup is usually wheat-derived.
Why don't UK sweets use high fructose corn syrup?
Historical EU/UK regulation capped it, and UK makers favour sucrose and lower-fructose glucose syrup instead.
How much HFCS is actually in the UK diet?
About 0.38kg a year per person, versus 24.78kg in the US.