I just made an appointment with an allergist (in a month) and I asked about allergy blood testing. The secretary said they don't do that, they do scratch tests. Does anyone know if these are effective, and if they will pick up the so called "sensitivities" that I've read about LEAP being able to diagnose?I am IBS-C so I don't even know if this is worthwhile, but thought it was worth a shot. Any information would be appreciated! Thanks.