GNC SUPERFOODS SPIRULINA CAPSULES: Each capsule provides 500mg of spirulina whole plant powder. PHYTONUTRIENTS AND MORE: Spirulina is a blue-green microalgae that is a natural source of essential phytonutrients, protein, and amino acids. FREE FROM WHAT YOU DON’T WANT: No Artificial Colors, No Artificial Flavors, Gluten Free, No Milk. BACKED BY SCIENCE: Since 1935, GNC has been committed to meeting the highest standards of quality, safety, and efficacy while applying the most up-to-date advances in nutritional science so you can live well.