Soya Allergy

Please click on the links below to read our articles. If you are interested in research findings, click here for links to research reports.

For links to freefrom food products click here.


Eggs from chickens fed on soya do contain soya residues. A discussion from 2007 and an article from the Weston Price Foundation quoting four studies which suggest that they do. December 2016

Blog post on What Allergy? highlighting that guar gum can contain traces of soya protein. August 2016

Illuminating post on the What Allergy? website about pinpointing an unsuspected soya allergy. February 2013

Genetically engineered soy beans may cause allergies (2) - part of a very much longer article on GhanaWeb. September 2010

Genetically engineeered soy beans may cause allergies – an interesting article from the Mercola site. March 2010

Soya residues in chicken and eggs: a short investigation by Michelle Berriedale-Johnson into evidence that suggests soya-fed chickens retain enough soya in their flesh and eggs to set off allergic reactions in consumers who are sensitive to soya. 2007




Research Reports

Boiling and Pressure Cooking Impact on IgE Reactivity of Soybean Allergens. Jan 2018

This study assessed soybean seeds that had been subjected to different thermal processing treatments to see if there were any differences in their capacity to bind to IgE and therefore induce allergic reactions. It was found that ‘treatment that combined heat and pressure produced a fragmentation of proteins in both soluble and insoluble fractions that went along with a decreased capacity to bind IgE’. Cooking methods may play an important role in increasing the ability to soybean and potentially other allergens.

IgE cross-reactivity of peanut with walnut and soybean in children with food allergy. October 2016
More research needs to be done to fully establish cross-reactivity but the researchers of this study suggest that, individuals who are allergic to peanuts should be cautious about consuming walnuts and soybeans. There is a high chance they may be allergic to these foods in addition to peanuts.

Investigation into the allergic properties of soya beans, the mechanisms of soya bean allergy, prevention and treatment, and effects of plant breeding on the soya bean's allergenicity. June 2015

Laboratory test suggest that fermentation can significantly reduce the allergenicity of soy products although this now need to be tested inhuman challenge studies. May 2015

Unlike soyabean proteins, germinated soybean proteins do not appear to provoke serious allergic reactions. May 2015

Researchers create new soybean with significantly reduced levels of three key proteins responsible for both its allergenic and anti-nutritional effects. Research here; comment here. April 2015

Duration of fermentation might be a key factor in the hypoallergenicity of miso. 2013

Over 62% wheat flour in US found to be contaminated with very low levels soya flour but little evidence that this causes reactions in soya-allergic people. December 2013

Higher rate of siezure among children with autism who were fed soya rather than milk infant formula. March 2014

If you are allergic to soya beans or eggs, you may be allergic to the anaesthetic Propofol. October 2012

Exposure to soya oestrogen can cause infertility. May 2012

Evidence shows mice that are sensitive to cow’s milk protein may also be sensitive to soya bean proteins. April 2012

The natural history of soy allergy. March 2010

Soybeans no longer a musical fruit? January 2009

Interpretation research into soya products - Townsend Letter. October 2008

Fermenting soya dramatically reduces its allergenicity. June 2008

Will soya cause a reaction in someone with a peanut allergy? January 2008



NB Information on this site is not a substitute for medical advice and no liability can be assumed for its use.

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