Nut allergies get most of the attention, but they're rarely the issue in a bag of pick 'n' mix. The allergens that actually turn up in sweets are a shorter, less obvious list.
Milk
Beyond the obvious chocolate-coated sweets, milk turns up in less expected places. Candy mice contain it directly, via whey powder. Several jelly sweets that contain no milk ingredient at all still carry a "may contain traces of milk" warning — Vidal's Jelly Filled Cola Bottles are one example — because of shared production lines rather than anything in the recipe itself.
Wheat
The main source in a pick 'n' mix tray is liquorice. Wheat flour is a structural ingredient in most liquorice-style sweets, including fruit-flavoured ones with a "liquorice finish" and no liquorice taste at all — we've covered this in more detail in our gluten-free sweets guide. Standard gelatine gummies (Goldbears, cola bottles) generally don't use wheat, but it's always worth checking the specific product.
Soya
Usually a "may contain traces" warning rather than a direct ingredient — Chupa Chups Big Babol bubblegum is one example in our range where soya is directly declared. Traces turn up more widely across fruit-flavoured sweets that share production lines with soya-containing products.
Mustard
An unexpected one for most shoppers, but it appears as a "may contain traces" warning on a number of fruit-flavoured jellies and liquorice-style sweets, again through shared equipment rather than as a recipe ingredient.
The difference between "contains" and "may contain traces"
These mean genuinely different things on a UK label. "Contains" means the allergen is a deliberate ingredient in that recipe. "May contain traces of" is a precautionary statement covering the possibility of cross-contamination from shared factory equipment — the allergen isn't in the recipe, but the manufacturer can't guarantee zero cross-contact. For a genuine, severe allergy, both statements matter; for a milder sensitivity, the distinction is often the more useful piece of information.
Where to actually check
Every product page on this site carries the ingredients and allergen statement exactly as the manufacturer supplies them, not a summary. For a genuine allergy, that's the only thing worth relying on — not the product name, the category it's filed under, or general assumptions about what "usually" contains what.
Frequently asked questions
Can non-chocolate sweets contain milk?
Yes — directly in some recipes (candy mice, via whey powder), or as a "may contain traces" warning on others due to shared production lines.
Do jelly sweets contain wheat?
Usually not, except liquorice-style sweets, where wheat flour is a common structural ingredient even in fruit-flavoured versions.
Why do so many sweets warn about soya or mustard traces?
Shared factory equipment, not the recipe itself — a precautionary label rather than proof the allergen is actually present.