About those "toxins" again This is kind of based on my previous thread (https://www.physicsforums.com/showthread.php?t=519106). Someone claimed that there are a lot of "toxins" in the food and that with a special kind of diet I will be free of any diseases. This crackpottery actually got me interested in the problem of nutrition. I have read the Ben Goldacres "Bad Science" and now I am more than ever suspicious of anyone claiming there are some mysterious toxins in the food. However, recently I saw a video that many of you probably are already familiar with (1.6e6 views!): http://www.youtube.com/watch?v=dBnniua6-oM" Mr. Lustig argues that fructose is a "poison" (he doesn't actually use word toxin) and he gives good reasons for it. This is new to me. I mean, of course I knew sugar is bad, but didn't know it was THAT bad. And now someone actually made an effort to explain it to me. He does not try to sell any special diet or supplements, and according to wikipedia he "is nationally recognized" persona and he didn't get his degree from a diploma-mill. So all this leads me to believing him. The only thing I, the lay man, could accuse him of, is that (in this presentation at least) he shows all these chemical reactions, but does not support the claims with any clinic trials (e.g. about fructose being almost as bad as ethanol). Do you guys have any comments on that? Do you have any other material about the diet stuff? What about e.g. sodium glutamate, or artificial sweeteners? I saw some videos on YT, but there are more conspiracy theories in them than facts.