That title is half a fiber joke and half pointing to the need for a Nutrition Fact Check website (similar to the politics version ). Fiber also happens to be a great way to slow down digestion, to reduce the surge of blood sugar following a higher carbohydrate meal and maintain satiety for longer (1). I see/hear a lot of things about Glycemic Index and many of them are not factual, misguided or simply untrue. The most common myth I've heard lately is that all whole grains have the same Glycemic Index value as processed grains (it varies a lot, some do , some don't - see below). Besides the fact that one should be using the Glycemic Load and ditching the Glycemic Index, it's hard to substantiate those rumors - I don't like to call out web sites, simply type into google "whole wheat same GI as white wheat" if you want to see the numerous websites passing around this myth. If you would like a reliable source regarding general Glycemic Indices, try this Ha...
Nutritional Sciences: Basic Science and Clinical Perspectives