Nut allergy tests ‘inaccurate’

Skin and blood testing is an inaccurate way of identifying nut co-allergies, experts warn.

That’s because people can show a positive reading, without being truly allergic.

An oral food challenge gives a much clearer, objective result, they say.

Pointing to the latest evidence, US immunologists say that about 50% percent of those who thought they were allergic to all tree nuts were able to pass an oral food challenge without a reaction.

The study notes that almost none of the people allergic to peanut, but sensitised to tree nut, were clinically allergic to tree nut.