Cinnamal: The Warm Spice Note That's a Declared Allergen
Cinnamal gives products a warm cinnamon scent and is one of the 26 EU-declared fragrance allergens. What it is, why it is named on labels, who reacts, and where it hides.
What it is
Cinnamal, also written cinnamic aldehyde or cinnamaldehyde, is the compound that gives cinnamon its warm, sweet, spicy smell and taste. It occurs naturally in cinnamon bark oil and is also made synthetically. Because the scent reads as cosy and comforting, you will find it in seasonal and “warm”-scented products as well as in flavoured items like toothpaste and lip balm.
Why it is listed separately
This is the useful part for label-reading. Cinnamal is one of the 26 fragrance allergens that UK and EU rules require to be named individually on the label when present above a set level, which is 0.001% in leave-on products and 0.01% in rinse-off ones. So you will often see “Cinnamal” spelled out near the end of an ingredient list even when the product simply says “Parfum” or “Aroma” higher up. Those named allergens make otherwise hidden fragrance components visible, which is a real help if you are sensitive.
Who tends to react, and how it shows
Cinnamal is one of the stronger fragrance allergens, meaning it sensitises people more readily than many others. It often travels with cinnamyl alcohol, a related compound, and reactions to one can come with reactions to the other. On the skin it usually shows up as contact dermatitis: redness, itching and sometimes small bumps or blistering where the product touched. Around the mouth it can cause a stinging, chapped, red zone, sometimes called perioral or lip-licker style irritation, because flavoured toothpaste, mouthwash and lip products are common sources. People with eczema or a history of fragrance allergy are most affected.
Where it hides
Spiced and “warm”-scented skincare and body products, festive and seasonal ranges, toothpaste and mouthwash, chewing gum, lip balms and lipsticks, and some household and air-freshening products. Look for Cinnamal, Cinnamaldehyde or Cinnamic aldehyde, usually near the end of an ingredient list. It is also a known component of balsam of Peru, so if you react to that fragrance marker, cinnamal is worth watching too.
What to do if you think you react
Keep a short diary of the products you use and when your skin or lips flare, and look for an overlap before cutting things out. If two products that bothered you both list cinnamal, that is a strong lead. Switching to a fragrance-free toothpaste and lip balm is an easy first test, since the mouth area is a frequent trigger zone. If a rash is widespread, sore or not settling, a GP or dermatologist can confirm a fragrance allergy with patch testing.
Common questions
Is natural cinnamon scent safer than synthetic? Not for allergy. Natural cinnamon bark oil is rich in cinnamal, so a “natural” product can be just as triggering, sometimes more so.
Why do my lips react to toothpaste? Flavouring compounds like cinnamal are a common cause of a stinging, chapped reaction around the mouth. A plain, unflavoured or low-flavour toothpaste often settles it.
If a product is “unscented”, is it cinnamal-free? Not necessarily. “Unscented” can still contain masking fragrance. Look for the named allergen on the label, or choose “fragrance-free”.
Check it against your own list
To check a product, INCIBeauty lets you look up an item and read plain-language notes on each ingredient, and a free browser extension like Clearya flags ingredients of concern as you shop online. These rate a product on general criteria rather than against your own list. Once you know what you are screening for, a personal-list app like ClearaScan lets you save cinnamal (and the other named fragrance allergens) once and scan any product, cosmetic, food or medication, to flag only your triggers. It also keeps a Reaction Journal for flare-ups, a shared Care Circle so family or carers can scan for you, and a Trusted Products list for items you have cleared, and it is currently in early access. (Disclosure: our editor co-founded ClearaScan, and we are not paid to mention the others.)