Nutrients play different roles in supporting the body’s overall health—including digestion, immunity, energy, and structural development. Fiber, protein, iron, and vitamin D each contribute in unique ways. Some nutrients help maintain a stable digestive process and encourage regular movement through the digestive tract. Others are involved in building and repairing tissues, transporting oxygen through the bloodstream, or supporting bone and muscle function. These nutrients can be found in a variety of foods—fruits, vegetables, whole grains, meats, legumes, and dairy products, just to name a few. Maintaining a balanced diet that includes a range of essential vitamins and minerals is key to supporting both short-term wellness and long-term health. Understanding how different nutrients impact specific systems—like the gut, immune function, or metabolism—helps you make more informed food choices and recognize how diet influences energy, comfort, and resilience every day.