Organic Spirulina is a blue-green vegetarian plankton that has been a source of nutrition for humans since the Aztecs harvested it centuries ago. Organic Spirulina is a natural "algae" powder that is packed with protein, iron, and nutrients. Spirulina is commonly referred to as a "superfood."Nutricost Organic Spirulina (16.2 oz / 454 g) is a pure, unflavored green superfood powder made from blue-green algae. It is certified organic, non-GMO, gluten-free, and vegan, providing a natural source of plant protein, iron, and key nutrients with a standard 1-gram serving scoop included.