I have been buying Green Alive for the past two years and have had great success with it. It's considered a "green superfood" a powder you can put into juice or water that contains spirulina as well as other enzymes. I first found out about it when I was suffering from an illness that doctors were baffled by - at one point I was seeing 5 different doctors! A friend found out about Green Alive and sent it my way. Within a month I was feeling much better, lost weight and had more energy. After a few months my mystery illness vanished!
While I have to admit the taste is terrible - it does grow on you. The benefits of the powder are incredible. The other downside is that you have to order it from Canada. Since I am in the US it takes nearly a month for it to clear Customs. That aside it has to be the best greens supplement I have found so far and would recommend it highly.