In a recent paper published in the journal Entropy, Dr. Stephanie Seneff and Anthony Samsel argue that the key ingredient in Roundup, glyphosate, contributes to most of the diseases associated with a Western diet — everything from gastrointestinal disorders to mood swings, heart disease to diabetes. Monsanto has long argued that glyphosate is perfectly safe for humans. That’s because glyphosate works by disrupting the shikimate pathway in a plant’s metabolism. Human metabolism does not have the shikamate pathway, so we are safe. But are we?