Cocoa is a food that is not considered by the World Health Organisation (WHO) to contain any allergenic proteins, however there have been cases of cocoa allergies reported.
Most of the studies relating to cocoa allergy are from factory workers and chocolatiers who spend all of their time working with the product.
There is a 2S seed storage protein in cocoa which is similar to those proteins found in tree nuts.
Chocolate contains theobromine and caffeine which may cause people to believe they are allergic to cocoa.
Cocoa allergy or intolerance has not been linked to any allergenic syndromes.