Allergic to Allergies?

A study in the US has revealed that about 50% of people who think they have an allergy, don't actually have one (https://www.theguardian.com/society/2019/jan/04/half-of-people-who-think-they-have-a-food-allergy-do-not-study). It is suggested that the situation is very similar in other countries including the UK. Actual allergies can be life-threatening but many people do not carry Epipens to administer adrenalin (often people just avoid the foods they think they are 'allergic' to). The study also suggested that many folk with real allergies developed them in adulthood rather than having the condition from childhood (this suggests that their first anaphylactic condition can be very dangerous). It is clear that much more regular scientific testing for allergies would be helpful and, potentially, life-saving.