Source Naturals Blue-Green Algae is wildcrafted and harvested from the upper regions of Klamath Lake in Oregon. A potent superfood, blue-green algae is a natural source of vitamins, minerals and phytonutrients, and it also supports healthy gastrointestinal function. Contains no dairy, egg, gluten, soy, corn, wheat, sugar, salt, starch, preservatives, or artificial color, flavor or fragrance.