"Dietary shifts" refers to changes in what someone eats or the types of food they consume. It implies a shift or modification in their diet or eating habits. Full definition
With dietary shifts we could feed the world sustainably, address the health and diet - related ill - health time bomb, and help meet our GHG targets. (treehugger.com)
Experts agree that those who skip this step may experience bloating, constipation, headaches, and other painful side effects of such a drastic dietary shift. (infraredsauna.com)
I had made this huge dietary shift and was cooking all of my foods from scratch and here I was, stuck with a headache. (pilatesnutritionist.com)