Which? Advice No advertising, no bias, no hidden agenda
Food intolerances

The truth about allergy testing

  • Whether or not food-testing companies are simply playing on our food phobias
  • Four different types of allergy testing methods put on trial
  • Get the experts’ verdict blood tests (IgG), vega testing, hair analysis and kinesiology

What's in this guide

Allergy tests: the facts

Are some food-testing companies playing on our food phobias and risking our health?

Blood tests (IgG)

Analysis of blood samples produced differing results for the same sample in our research

Vega testing

Can an electric current point to food intolerances? We put Vega testing on trial to find out

Hair analysis

Our researchers received conflicting reports with this test and were given a standardised diagnosis

Kinesiology

This test claims that muscle weakness indicates that a certain food is causing problems