Can you point me to some info about this? I always hear this and it sounds so implausible to me. Every culture has had a grain at the base of it's food, wheat, rice, corn, quinoa...
I understand refined processed grain like white rice or white flour is no good, but I have a hard time accepting whole grains are a problem.
Can you give me more info on this?
Here is an article that covers a bunch of reasons why grains are getting a bad reputation..
http://nourishedkitchen.com/against-the-grain-10-reasons-to-give-up-grains/
I personally haven't given up on grains all-together, and I have days where I allow myself to indulge in them as much as I want, but they're definitely one of the problems in the modern diet.
They're easy to over-consume, they're cheap, and they generally cause a rapid rise in insulin. It may be that they wouldn't be enough on their own to cause problems for most people (and certainly people have been eating grains for a long time, while obesity didn't get totally out of control until recently), but in combination with all the sweets, and soft drinks, and potatoes, they become part of a wider problem: too much overall carbohydrate in the diet, and not enough fiber to slow down the digestion of it, leading to spikes in insulin, craving cycles, and all sorts of other health problems.
It's possible that it's primarily the over-consumption of soft drinks and sweets that put most people into a condition of insulin resistance, leading ultimately to obesity and all the problems associated with it. But once that condition develops, grain might be too much for the body to handle, even though it might not have been an issue if the person hadn't eaten too many sweets earlier in life. I've heard speculation on this somewhere, but i can't remember the source, and the science on all these subjects is still somewhat undecided. Suffice to say, grains are most likely one of the foods causing problems with obesity, and some people genetically have more tolerance for carbohydrates than others.