Pistachios are high in healthy fats, fiber, protein, antioxidants, and minerals such as vitamin B6 and thiamine. Their health advantages may include weight loss, decreased cholesterol and blood sugar levels, and better gastrointestinal, eye, and blood vessel health. They're also very nutritious. One ounce of pistachios contains about 20 percent of your daily value of magnesium, 16 percent of your daily value of phosphorus, 10 percent of your daily value of zinc, and 9 percent of your daily value of copper. They're also a great source of selenium, which helps protect cells from damage caused by free radicals. Pistachios are one of the only foods that are high in both soluble and insoluble fibers. Insoluble fibers help move through your digestive system more quickly and easily while soluble fibers have benefits for your heart health by reducing cholesterol and triglycerides. They're also a good source of calcium and potassium. Pistachios are one of the only food sources of phytosterols. These are plant hormones that can be found in vegetables, fruits, grains, beans, nuts, and seeds. Studies show that people who eat more plants-based foods tend to have lower rates of cancer and other diseases. Pistachios are loaded with antioxidants.