https://www.youtube.com/live/4LAAIawLpVc?feature=shared
I would subscribe to Dr Peter Osbornes channel. He's the best known expert on grains. His book is titled, No Grain, No Pain . I love the taste of corn; however Corn is heavily sprayed and has a protein that causes serious health problems. I learned this and gave up on the GMO (nearly all corn is now), oil, corn syrup/ sugars/ starches.
I still eat popcorn because the food industry hasn't gotten around to ruining it yet with genetic modification.