Swizzels Love Hearts contain sugar, acidity regulators (malic acid, stearic acid), sodium bicarbonate, modified starch, an anti-caking agent (magnesium carbonate), flavourings, and various colours, including anthocyanin, beetroot red, copper chlorophyllin, lutein, and paprika extract. The sweets themselves do not contain common allergens such as dairy, nuts, soya, or gluten and are suitable for vegans and vegetarians. However, due to manufacturing practices in facilities that also handle other products, there is a risk of cross-contamination. Therefore, individuals with severe allergies should always consult the packaging for the most current and specific allergen warnings.