Zhou Nutrition, Spirulina, 180 TabsProduct Description They call spirulina a superfood for a reason, and of course we had to take it one step further. Our quest for the purest spirulina in the world brought us to a remote farm in Southern California, where this blue green algae is harvested using a closed loop water and nutrient recycling process. Rest easy knowing that both the longevity of you and the planet is being supported with this eco conscious essential. Product Benefits