Spirulina is a saltwater algae with a bluish-green color and spiral shape. It has been used for millennia as a food source. This algae contains phytonutrients and is the most concentrated source of protein known to this day (up to 70%). Spirulina maintains overall vitality. Biotona Bio Spirulina Raw is produced from 100% organic algae, cultivated in the open air and with intense sunlight. After harvesting, these algae are subjected to a drying process higher than normal, which ensures the preservation of their nutritional value.