By Kate Prengaman
Sometimes, it feels like there is too much advice for healthy eating. Health food fads like gluten free, or low sugar, or whole grain or eating only local, seasonal food have all become pretty popular recently. Fads like low fat and no carbohydrate diets seem to be fading out in the enthusiasm for the new trends. I recently discovered Google’s ngrams viewer, a tool that you can use to view the frequency of word use in a large subset of all of the books published every year. Search for a specific word that represents a cultural idea, like “low fat diet” and you can use the graph of it’s frequency to know when it became a popular. I wrote a larger post about the science of the ngram tool, you can read it here.