Source Naturals Chlorella is a complete protein as well as a rare vegan source of vitamin B-12 made from pure, 100% algae. It is also a good source of iron and vitamin A. Research suggests that chlorella may also help support the health of the liver and the immune system. Source Naturals Chlorella is non-GMO, and does not contain any animal products or animal-derived ingredients.* Green Superfood Suggested Use: 4 tablets daily, preferably with meals. Allergies: Suitable for vegans & vegetarians. Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, preservatives, or artificial color, flavor or fragrance.