If someone is allergic to peanut, can they eat tree nuts?

Clients need to discuss this question with their allergist. A client may be advised to restrict all nuts for two reasons: 1) Cross contamination (cross contact):  Tree nuts are often processed on the same equipment as peanuts. 2) Cross reactions: 

Are the results of IgG blood testing valid?

IgG is a type of antibody produced by the immune system. IgG to specific foods circulate in the blood, and many practitioners claim this causes poor health. However, several research studies have not supported this theory. The Guidelines for the