Are skin prick tests accurate for food allergies?

Yes, for ruling out: Skin prick testing is used to see if you might be at risk of developing hives or anaphylaxis after eating a food. If a skin test is negative, it is unlikely that food is causing that type of reaction. If it positive, you are at higher risk of having hives or anaphylaxis, but there is a chance that it is falsely positive.

Yes, helpful: I agree. Skin prick testing to evaluate for food allergies can be very helpful, and can help direct dietary restriction. It is always used in clinical context to support an adverse reaction to a food. The size of the reaction will indicate the likelihood of an adverse reaction and not if you will have anaphylaxis.