Instant and Free Food Sensitivity Testing Why is it so important to identify and avoid foods to which we are sensitive? In a nutshell, food sensitivities equal stress and stress slows the metabolic rate, interferes with digestion and leads to a host of health issues. Alternative medicine practitioners utilize numerous approaches to determine if an individual is sensitive or allergic to a substance. Common techniques include muscle testing and electrodermal biofeedback. All these approaches are based on the concept that the body exibits a stress response when a substance is not right for the individual at that time. Unfortunately, it can be