3. White Bread and Refined Carbs

White bread, pastries, and other refined carbs lose most of their fiber during processing, which means they hit your bloodstream almost as fast as straight sugar. As insulin sensitivity naturally declines with age, those rapid blood sugar spikes become harder for your body to manage and more likely to be stored as fat. Refined carbs also leave you feeling hungry again sooner, which can lead to overeating later in the day. Swapping in whole grain bread, brown rice, or quinoa keeps the fiber intact and your blood sugar far steadier. It’s a small switch that pays off in fewer energy crashes.