Spirulina Powder 100% Naturalby the company (NOWFOODS). Also CHORELLA are all excellent Green Foods. Swanson Vitamins has Kyoto Brand which is the best. I buy a 4lbs container of Spirulina and take 2 table spoons mix it with 8oz of juice along with some Barley Grass and it taste like a smoothie. You'll pay between $68-$73 for Spirulina if you choose to buy the 4 lbs one or you can get a smaller amount. The large one will last you over 4 months or more. If you go to the website (naturalnews.com) they have an article on Spirulina and Chorella and all their numerous health benefits.