I have taken Spirulina for 30+ years..... talk about great health! The experience you described while taking organic Spirulina may be attributed to the product originating in China.... 70% of what is being sold is from China & loaded with heavy metals. & irradiated prior to coming into the US.. it defeats the purpose of taking it! Some of the other organic is now grown with animal blood & can therefore be called organic. Here is a clue, if you are paying less then $40.00 per pound you are not getting a good quality Spirulina.... we happen to have/get one that grows in 110-130* temperatures & develops a high amount of phycocyanin which is what protects the bodies immune system. Right now, it is imperative that people take this product because of the exposure we are receiving from low level amounts of radiation.... especially from Japan. Spirulina is protective to the bodies DNA & very important for pregnant women, children & the elderly..... you can learn about it on Wednesday nights 7:00 pm west coast time 218-862-1300 EXT. 879434