Does food sensitivity testing for IgG subclasses help guide your management of food allergy?

No, it absolutely does not. For clinical concerns about an IgE mediated event, the food specific IgE testing is what we reach for. For other adverse food reactions including intolerances or sensitivities, food IgG or subclass testing doesn't correlate with symptoms either. The presence of food speci...

Agree with Dr. @Dr. First Last above. Recent review: Wong et al., PMID 33493642.