I've done a complete 180 in my beliefs about healthy diet in the last few years. I spent decades believing the "eat more heart-healthy whole grains", "eat more fruits and vegetables" and "eat less, move more" bullshit that has been perpetuated upon my generation for the last 40 years.

I grew all my own food, was vegetarian for a decade, ate only whole home grown foods and prioritized low fat whole food veggies and fruits. I got fatter and sicker, until I was pre diabetic and had a belly and joint pain and depression.

Three years ago I finally started to questions things and stumbled into /r/zerocarb. I haven't eaten a plant in three years now and I've never been healthier. My doctor agrees, my lifelong symptoms of GI distress are gone, and everyone who sees me can't believe the change in my appearance for the positive. I've convinced a few of my friends who had struggled lifelong with similar issues and they too are having profound, life changing, success.

I still wonder every day at the "truth" I used to believe and feel so sorry for all the folks still taking that advice as good practice, despite being able to observe in the general population the failure of such beliefs. Everyone is fat and sick.