Protein gets all the attention, but fiber is the nutrient I most often see people fall short on.
Fiber feeds the good bacteria in your gut, keeps things moving, and helps you feel full and steady between meals. Most adults do well aiming for a wide variety of plants across the week rather than hitting a perfect daily number.
Easy wins: leave the skin on your potatoes, add beans or lentils to soups, keep frozen berries for breakfast, and snack on fruit with a handful of nuts.
Increase fiber gradually and drink water alongside it — your gut will thank you.