I noticed coffee always made me feel like crap, after several hours. I figured this was due to, too much caffeine. I, then switched to organic swiss process decaf ( Dave said decaf has the highest concentration of mycotoxins) and still felt like crap. I gave up on coffee and caffeine for a long time. Just recently, I came back to caffeine in the form of 5 hour energy shots. I noticed none of the same crappy feeling that coffee gave me. I found Dave's website and his post on mycotoxins. I put this altogether and realized these mycotoxins are a real threat to performance and need to be avoided. I took the plunge and bought Dave's expensive coffee and wow is all I can say. A profound difference in how I feel after this coffee vs cheap crap. Mycotoxins have been researched for sometime, and the data doesn't look good for those consuming them.