(NaturalNews) For those who are familiar with the GAPS diet, rebuilding the gut is of paramount importance. After all, the gut isn't only involved in properly absorbing nutrients to keep us fit - it's the foundation for a strong nervous system and immunity as well. When the gut is in top form, food sensitivities and illnesses have a harder time taking root. Interestingly, research has shown that probiotics can also heal the gut to such a point that food intolerance and allergies disappear.