Intermittent fasting is a terrific regulator of the immune system as it controls the amount of inflammatory cytokines that are released in the body. Two major cytokines Interleukin-6 and Tumor Necrosis Factor Alpha promote an inflammatory response in the body. Studies have shown that fasting reduces the release of these inflammatory mediators). The immune system modulation that intermittent fasting provides may also be helpful if you have moderate to severe allergies.