ALLERGY RESOURCES

COMPREHENSIVE ALLERGY RESOURCES FOR EVERYONE - THE TOP 14 ALLERGENS AND BEYOND

COMPREHENSIVE ALLERGY RESOURCES FOR EVERYONE - THE TOP 14 ALLERGENS AND BEYOND

CASTOR BEAN ALLERGY


Key Allergens

Castor oil is made from the seeds of castor plants. The seeds are not suitable for human consumption as they contain the toxin ricin. The beans are harvested and processed to make castor oil which is used in various health remedies and cosmetics.

The main allergen in castor bean allergy is called Ric c 1. This is a 2S albumin protein. This group of proteins are involved in seed storage, plant growth and development.

Castor oil contains ricinoleic acid and is a common ingredient in lipsticks and lip care products. This has been known to cause contact allergic reactions.

Associated Syndromes

Allergic Cheilitis is the name given to swollen lips from a contact allergic reaction. This can be cause by castor oil in lipcare products.

Cross Reactivity

Other food containing 2S albumin seed storage proteins are cashews, peanuts, brazil nuts, mustard seed, rapeseed, turnip, chickpeas, hazelnuts, pistachio, buckwheat, soya, sunflower seeds, walnuts, kiwi, castor beans and sesame seeds.

Resources

Websites

Science Direct - Ricinoleic Acid

DermNet NZ - Contact Reactions to Lipsticks

Anaphylaxis Campaign - Vegetable Oils

Allergy information for: Castor bean (Ricinus communis)


Articles and Journals

Allergic contact cheilitis in an adolescent to Ricinus communis seed oil (castor oil) in a lip balm, 2018

Anaphylactic shock following castor bean contact: a case report, 2017

A Case of Castor Bean Poisoning, 2008

2S Albumin Storage Proteins: What Makes them Food Allergens? 2008

The Ricinus communis 2S albumin precursor: a single preproprotein may be processed into two different heterodimeric storage proteins, 1990

Allergy to castor bean: II. Identification of the major allergens in castor bean seeds, 1988



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