"Sugar-free" and "no added sugar" sweets don't just leave sugar out — something has to replace the sweetness, and it's not always the maltitol most sugar-free boiled sweets use. Here's what the other category, intense artificial sweeteners, actually covers.
Two different kinds of sweetener
It's worth separating these clearly, because they work completely differently. Sugar alcohols (maltitol, isomalt, sorbitol, xylitol) replace both the sweetness and the bulk of sugar, which is why they're the default choice for sugar-free boiled sweets and toffees — we've covered that side in our sugar-free sweets guide. Intense artificial sweeteners are a different category entirely: compounds like aspartame, acesulfame K, sucralose and saccharin that are many times sweeter than sugar gram for gram, so only a tiny amount is needed and they contribute essentially no bulk or texture on their own.
Where they actually turn up
In confectionery, intense sweeteners are mostly found in sugar-free chewing gum and sugar-free mints, and sometimes alongside sugar alcohols in sugar-free gummies and jellies to round out the sweetness, since sugar alcohols alone can taste slightly less sweet than sugar. They're far more prevalent in sugar-free and "diet" soft drinks than in sweets generally — standard full-sugar sweets don't use them at all.
Are they regulated?
Every sweetener permitted in UK and EU food has been through a safety assessment by bodies including the Food Standards Agency and the European Food Safety Authority, and is approved with an acceptable daily intake figure, the same regulatory process applied to other food additives. Aspartame specifically carries a warning for people with phenylketonuria (PKU), a rare inherited condition, because it breaks down into phenylalanine — which is why aspartame-containing products must state "contains phenylalanine" on the label.
How to actually tell what's in a specific sweet
Because the two categories are used differently and sometimes together, the ingredients list on the specific product is the only reliable way to know which sweetener, or combination, you're buying. We list manufacturer ingredients on every product page rather than a generic summary, for exactly this reason.
Frequently asked questions
What's the difference between a sugar alcohol and an artificial sweetener?
Sugar alcohols like maltitol replace sugar's bulk as well as sweetness. Intense sweeteners like aspartame are vastly sweeter by weight, so only trace amounts are used, and they don't replace bulk.
Are artificial sweeteners in sweets safe?
Those permitted in the UK have been assessed by the FSA and EFSA with set intake limits. People with specific conditions, such as PKU with aspartame, should check labels directly.
Which ones show up most in UK sweets?
Acesulfame K, aspartame, sucralose and saccharin are the most common, mostly in sugar-free gum, mints and some sugar-free gummies rather than standard sweets.