1.Food-grade 100% pure spirulina powder 2.High Protein >62% 3.Very low heavy metal content ... . Spirulina also contains many different minerals, including calcium, chromium, copper, iron, magnesium, manganese, phosphorus, selenium, sodium, zinc, and large amounts of ... of spirulina, which is a reason many people take spirulina powder daily, is that it is believed to reduce allergic reactions ...