Yes, chlorella,superior to chlorophll. It's so highly concentrated. It soaks up toxins and filters blood, and it's highly alkaline. Chlorella, which wheat grass has, but chlorella by itself is much stronger. I just add both together because I have it. I find it so highly digestable and agreeable to my system. I was taking it to soak up candida toxins. (even Dr. oz said so!)
Chlorella is used to chelate mercury, but I don't take that much to do that, and even if it pulls a little, I certanly don't mind. the most I've taken is a packet of 3 grams..mgs.. but that's really nothing if you want to chelate.