> The lady had a severe sesame allergy and was rushed to the hospital -- she did not know that tahini was sesame paste and I did not tell her.

I saw similar with corn, my cat was having a severe reaction to something and vet suggested getting food without corn in it, then gave me a list of like 20 different names for ingredients manufacturers use to hide corn.

(though with your's it's not we're trying to hide/obfuscate ingredients)