A Harvard processed foods expert shares 3 simple food swaps you can make for a healthier brain and gut

• A researcher who studies processed foods said the work prompted him to make his own diet healthier. 
• He cut back on certain foods after finding a link to health risks.
• Instead, he aims for whole foods, high fiber snacks, and meals with recognizable ingredients. 

Once, chicken nuggets were a convenient, popular dinner option for Dr. W. Taylor Kimberly and his family.

But after studying ultra-processed foods in more detail, and seeing how they affect the brain, he's switched to grilled chicken instead.