By HRS Food · Published · Reviewed
Love Hearts sweets: how do the fizz and messages work?
Original Love Hearts are fizzy tablet sweets with messages on their surface. Their declaration includes an acid and sodium bicarbonate, which can release carbon dioxide when moistened. Swizzels confirms that the message uses embossing and edible ink, while keeping its exact production method private. [1][2]
Why do Love Hearts sweets fizz?
The Original declaration lists malic acid and sodium bicarbonate. Moisture lets these kinds of ingredients react, releasing carbon dioxide. That is different from popping candy, which releases gas already trapped inside the candy.
The dry sweet keeps the ingredients together until you eat it. Fizzy and sour are related descriptions, but they do not mean exactly the same thing: acidity is a taste, while gas bubbles contribute a fizzy sensation.[1][2]
Is the fizz the same as Pop Rocks?
No. A reaction that produces gas after wetting and the release of gas trapped during manufacturing are different mechanisms.
How are the messages put on Love Hearts?
Swizzels describes the messages as embossed, with edible ink, and says the exact production method remains a company secret. That gives a useful factual answer without pretending the full machinery sequence is public.
Look at the surface of a tablet: the message belongs to the sweet, not just its wrapper. Modern messages have changed over time, which is part of why the sweets are used for favours and small gifts.[3]
Love Hearts Original rolls vs Lipsticks
An Original roll contains the familiar round tablet format. Love Hearts Lipsticks are a different shaped confectionery format. The shared name is not a guarantee of the same size, presentation or ingredient list.
If you are buying favours, compare rolls with rolls and pieces with pieces. A box count can refer to wrapped retail units rather than individual tablets. Use the named HRS format below and check its pack description before calculating quantities.[1][3]
Compare the differences at a glance
Explore the difference
Original tablet
A fizzy sweet with a message on its surface.
| Look for | What it tells you |
|---|---|
| Original tablet | A fizzy sweet with a message on its surface. |
| Embossing and edible ink | What Swizzels publicly confirms about the message. |
| Original roll or Lipsticks | Different formats to check separately. |
Related confectionery at HRS Food
These are the named formats listed at HRS. Open the product page to choose the quantity and check the current pack information.
Product images identify the named retail or case formats; quantities are set by the linked listing and your selected option. Use the current product page and physical pack for ingredients, allergens, dietary suitability and storage. Recipes and available formats can change.
Customer questions, answered
Sources and how we checked
Written by HRS Food. Brand and science references checked on ; HRS product examples checked against the live catalogue. The cited regional product is identified where market recipes differ. This is an independent educational guide. The illustrations explain structure and are not evidence of a private manufacturing recipe.