Common offenders can include dairy, soy, corn, meat, shellfish, peanuts, tree nuts, gluten, wheat, and FODMAPs. The simplest way to identify a food intolerance or food sensitivity is an elimination diet. Begin by removing the common offenders known to cause uncomfortable symptoms. Reintroduce back into your diet — one at a time — and monitor your progress. If you begin to experience symptoms, you can feel confident this might be a chronic offender and you should steer clear moving forward.