Spirulina is an alga which exhibits some amazing characteristics. It contains proteins, B vitamins, and essential minerals. It can detox your body of heavy metals, lower blood pressure, reduce cholesterol, boost energy and even has anti-oxidant and anti-cancer properties. Most importantly, it can soothe allergic symptoms, especially allergic rhinitis, by modulating your T-helper cell differentiation and modulation. These are the cells of your immune system which help suppress or regulate immune responses and they are of great importance to understanding allergic reactions.