Spirulina is a micro-alga considered to be a superfood. It has multiple benefits for the body. We are particularly interested in a specific part of spirulina called phycocyanin. This natural substance is one of the most powerful antioxidants in the plant kingdom. Its powerful antioxidant activity is essential to protect the immune system from external pollutants and free radicals generated by oxidative stress. A well-preserved immune system is an immune system that works optimally to defend the body.