Contains 500mg of Spirulina Spirulina is a blue green algae that contains plant enzymes Suitable for vegetarians and vegans Spirulina is a well-known type of blue green algae that can be found in the world's oceans and lakes. Spirulina contains plant enzymes. Enzymes are protein molecules that are an integral part of many systems within the body. Because of its popularity as a completely natural food source, Spirulina is harvested for commercial use around the world. These supplements are suitable for vegans and vegetarians.Holland & Barrett International Limited, Barling Way, CV10 7RH, UKHolland & Barrett Limited, 45 Henry St, D01 E9X8, Ireland