A friend with an unreliable chocolate allergy turned out to have a soy allergy that the soy lecithin triggered (you can find alternatives with sunflower lecithin instead.) Once they figured that out, as far as they were concerned soy was a biohazard :-)
Seriously, a lot of our developed alergies could just be perfectly natural reactions to the amount of chemicals and other garbage ... everywhere, these days.-
While that's despicable, likely biased researches aren't the right way to fix that. Same apply for alleged high arsenic content in rice and seaweed, high mercury content in fish, etc.