Benzoic acid, sodium benzoate and parabens are all examples of benzoates.

Benzoates are a type of preservative which is very effective as antifungal and antibacterial agents to give products a longer shelf life. Unfortunately can act as an irritant in some people and can cause contact allergic reactions, worsening of eczema or asthma symptoms, or in some cases cause anaphylaxis when consumed.

If you think you have a benzoate allergy, you should avoid foods, medicines and cosmetics which contain benzoates. Additionally there are a number of E numbers to watch out for including sodium benzoate (E211), potassium benzoate (E212), calcium benzoate (E213) and methylparabens (E218).

Benzoates are associated with allergic contact dermatitis, angiodema (swelling of the skin) and worsening of asthma symptoms.

Sodium benzoate does not occur naturally in food, but benzoic acid is found in dried foods such as prunes, cinnamon, cloves, tea, tomatoes, plums, apples and cranberries. Benzoates are also added as a preservative in soft drink, pickles, salad dressing, soy sauces, jams and jellies.

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