Walnuts are easily one of the healthiest snacks you can eat. These nuts are naturally packed with healthy fats, essential vitamins, and antioxidants that support brain function, heart health, digestion, and overall immunity. But because they’re a natural food with high oil content, they don’t last forever, and storing them improperly will make them spoil fast. Here is a practical look at how long they stay fresh, what they do for your body, and the best ways to eat them.Can walnuts actually go bad?Yes, walnuts definitely spoil. Because of their high oil content, exposure to heat, light, and air makes them go rancid fast. Fresh walnuts smell mildly nutty and have a clean crunch. If yours smells like paint or tastes harsh and bitter, they’ve gone bad. To keep them fresh longer, put them in a sealed container in the fridge or freezer, where they can last up to a year.Nutritional profileWalnuts are packed with essential nutrients, especially omega-3 fatty acids, vitamin E, magnesium, and antioxidants. Eating them regularly helps support a healthy heart, lower body inflammation, and keep your brain sharp. Just a handful (about 28 grams) provides 4 grams of protein, 2 grams of fiber, and a good dose of healthy fats that are essential for overall well-being.Right way to consume walnutsWhile walnuts are perfect for winters, as they can give ample warmth to the body, what about the rest of the year? Well, it’s important to consume walnuts in a way that helps cool the body. Soaking walnuts overnight and consuming them the next morning is ideal. Soaking walnuts lowers their heating effect on the body, making them easier on your stomach and helping you absorb their nutrients better. You can throw them straight into smoothies, toss them into salads, or spoon them over yogurt for a fresh bite.You can easily add walnuts to your everyday meals beyond just soaking them. Try tossing a handful into a fresh green salad, blending them into a morning smoothie, or using them as a crunchy topping over yogurt and chilled desserts. That earthy flavor and natural crunch pair great with fresh apples, berries, and citrus fruits.If you want to eat walnuts year-round, especially through the summer heat, how you store and eat them matters. Storing them in a cool place keeps the oils fresh, while soaking them overnight lowers their heating effect so you can enjoy their nutrients without upsetting your stomach. Soaking them overnight and pairing them with cooling foods lets you get all their nutrients without overheating your body.Ways to keep walnuts fresh for a long timeKeep your walnuts in an airtight glass jar or heavy-duty sealable bag. Air and moisture are their biggest enemies because the natural oils inside the nut oxidize quickly when exposed to oxygen. Storing them in a cool, dark pantry will buy you a few weeks, but keeping them at room temperature long-term guarantees they will lose their crunch and go stale.For everyday storage, toss that airtight container straight into the fridge. Cold temperatures slow down rancidity dramatically, keeping shelled walnuts fresh and sweet for up to six months. Just make sure the seal is tight, as walnut fats easily absorb strong odors from surrounding foods like onions or leftover meals.If you bought walnuts in bulk, the freezer is your best option. Freezing stops the oil breakdown almost completely, preserving their fresh flavor and crisp texture for up to a year or more. You don’t even need to thaw them before using; frozen walnut pieces can be tossed directly into salads, baked goods, or smoothies right out of the bag.