There’s healthy belly bacteria, and then there’s bad belly bacteria, which studies indicate overweight people have more of in their gut. To keep the fat-causing bugs at bay, you need to eat a variety of foods that support their healthy counterparts—the kind found in the bellies of slim people. Examples of probiotic-rich foods that help you lose weight by aiding digestion include kimchi, kombucha, bone broth, and kefir.
“Anytime you’re stressed, you probably go for food,” Dr. Seltzer says. (Have we met?!) That’s because cortisol, the stress hormone, stokes your appetite for sugary, fatty foods. No wonder it’s associated with higher body weight, according to a 2007 Obesity study that quantified chronic stress exposure by looking at cortisol concentrations in more than 2,000 adults’ hair.