Posted by iHerb Customer on Jan 20, 2013 | Verified Purchase
I am using this to prevent cancer, which my family has a history of. The documentary " World without Cancer" is very impressive and I highly recommend it. BUT BEWARE! These things are strong and they DO release some cyanide into your system. I took a few too many one day ( 6 at once) and found myself felling weak and dizzy. I am 5'3" and weigh 115 lbs. and chewing 6 at once made me ill. I still take these, and will continue to do so. But I recommend using with care and caution.