Pecans provide phytonutrients, plant-based compounds that have powerful antioxidant benefits. They're also a good source of the mineral zinc, crucial for immune-cell development and function. Diets high in zinc are linked with a lower risk of many diseases, particularly those related to age and lifestyle. Benefits of pecan nuts 1. They're important for immunity. 2. They're full of flavonoids. 3. They're crucial for heart health. 4. They can boost your brain. 5. They're helpful for weight loss. 6. They've got key minerals. 7. They can satisfy a salty-snack craving.