When you eat a donut, has it ever occurred to you that it stays in your system for 3 days? Or that it could slow down your metabolism? It's true: Processed foods give us a quick jolt of sugar or salt to satisfy a craving, but all the fat, sugar, and processed ingredients can slow your metabolism, studies show, and also impact your long-term health.
Once food enters your mouth, the digestive process begins. The only control you have throughout the course of digestion is when you’re chewing and breaking the food down. As soon as you swallow it, your stomach, small intestine, and large intestine take over and do the rest.