On April 28, we reported the news of the detection of crushed almond shells in spices, especially cumin, paprika and various mix, at a level not yet identified of the supply chain, with the clear aim of financial gain. On this occasion, the results of the analysis were considered unreliable by Bart Ingredients, a British food company, which has highlighted the possibility of “false-positives” attributed to another ingredient, the “mahaleb”, extracted from a variety of cherry tree.
The 29th June, the Food Standards Agency has rescinded a recall of a batch of ground cumin sold by the Bart Ingredients Company. The affected product had tested positive for the presence of almond protein which is not declared on the label. This follow the same decision by CFIA (Canadian Food Inspection Agency) on other cases: few weeks ago, indeed, the Canadian authority detected the same issue.
Additional testing by the Laboratory of the Government Chemist (LGC) has shown a spice called mahaleb was present and not almond protein. Mahaleb and almond are from the same ‘Prunus’ family of trees and shrubs. However, mahaleb is not one of the 14 allergens identified in food allergen legislation. There is no evidence that the contamination was a result of fraudulent activity.
The level of almond protein detected was considered to be a risk to people with an allergy to almond. The company subsequently produced test results from samples of the same material that contradicted the positive result.
Will Creswell, Head of Consumer Protection at the FSA, said: ‘Throughout this incident we have carried out protein and DNA testing, using accredited laboratories and validated methods, and both indicated the presence of almond protein in this product. Consumer safety is the FSA’s highest priority and our risk assessment at the time was that this product could potentially harm people with an allergy to almond. We were correct to ask Bart Ingredients to take precautionary action. Now that new evidence has come to light we are able to rescind this particular recall.
‘The FSA will now work with public analysts, analytical scientists, the industry and local authorities to review these testing methodologies. As with all significant incidents, we will also work together to review our actions and identify what lessons can be learned.’
LGC used a type of analysis called ‘liquid chromatography-mass spectrometry’ which, in combination with DNA testing, found that mahaleb could produce a false positive result for almond protein in cumin. This is the first time researchers have identified this type of reaction.
Michael Walker, Consultant Referee Analyst in the Laboratory of the Government Chemist, said: ‘This has been a pioneering and resource intensive scientific investigation involving a large multidisciplinary team of scientists. Almond and other Prunus species in spices had received little attention. We now know that ELISA detection is useful but only as a screening test. There are unusually high similarities in the DNA and protein of these related species that make it very difficult to tell them apart in spices. But thanks to the expertise of the molecular biologists and protein chemists in LGC we have developed what is, to the best of our knowledge, the world’s first DNA test for mahaleb and discovered subtle mass spectrometry differences to distinguish almond and mahaleb proteins.’
There have been several other recalls in the UK during this incident, the majority of which have been for undeclared almond in paprika products. There is currently no evidence of cross-reactivity due to mahaleb in paprika. However, the FSA is doing further research to clarify this.
All other recalls in the UK associated with almond contamination of paprika still stand as the evidence presently available to the FSA suggests the affected products remain a potential health risk to people with an allergy to almond.