Rice is harvested from plants in the Poaceae
family of plants. Other plants in this family include barley, corn, wheat, durum wheat and oats.
The allergens in rice are called Ory s 1 and Ory s 12. They are both considered to be airway allergens.
Ory s 1 is a beta expansin protein. These are found in the cell walls of plants and are a common cause of grass pollen allergies.
Ory s 12 is a profilin protein
, most commonly causing allergic reactions in the airway, like hayfever.
Food Protein Induced Enterocolitis Syndrome (commonly known as FPIES) is often triggered by rice. After milk and soya milk, rice is one of the most common foods which triggers FPIES in children.
Rice is a low FODMAP food. FODMAP stands for F
olyols. Foods high in FODMAPs can cause symptoms of food intolerance, affecting the gastro intestinal system and this can be mistaken for a true IgE food allergy.
Rice contains lectins, with higher amounts in brown rice or wild rice over more processed white rices. Lectins can cause food intolerance symptoms in some people. The amount of lectin protein in food can be reduced by cooking for longer or soaking grains in water and rinsing before cooking. This breaks down the proteins and reduces reactions.
Allergic reactions to rice are commonly linked to Food Protein Induced Enterocolitis Syndrome (FPIES).
Only barley contains beta expansin proteins as food allergens. As an airway allergen, multiple species of grasses, rye and maize all contain beta expansin.
Profilin proteins are both food and airway allergens. Other profilin airway allergens are ragweed, wormwood, grasses, birch trees, sunflower, olive, plantain, poplar, oak and maize.
Allergen Encyclopedia - Rice
NY Allergy & Sinus Centers - Rice Allergy
Allergy information for: Rice (Oryza sativa )
ASCIA - FPIES
Healthline - FODMAP Foods
Articles and Journals
Food Protein-induced Enterocolitis Syndrome Due to Rice in a Japanese Infant: A Case Report, 2022
Non-specific lipid-transfer proteins: Allergen structure and function, cross-reactivity, sensitization, and epidemiology, 2021
An exploration of factors associated with food protein-induced enterocolitis syndrome: Birth, infant feeding and food triggers, 2021
Allergenic potential of rice-pollen proteins: expression, immuno-cross reactivity and IgE-binding, 2013
Food protein induced enterocolitis syndrome caused by rice beverage, 2013
A case of rice allergy in a patient with baker’s asthma, 2012
Rice-Induced Anaphylaxis: IgE-Mediated Allergy against a 56-kDa Glycoprotein, 2012
Bronchial asthma induced by rice, 1998
Cloning, expression and immunological characterization of Ory s 1, the major allergen of rice pollen, 1995
Immediate hypersensitive reactions to buckwheat ingestion and cross allergenicity between buckwheat and rice antigens in subjects with high levels of IgE antibodies to buckwheat, 1995
Let me know if you found any of these interesting or useful.
If you spot an article or research that you think is interesting you can message me or tag me on Facebook or Twitter - links at the bottom of the page.