1 / 6Oranges are rich in vitamin C, fiber, and antioxidants. All these nutrients help in boosting the immune system, promoting intestinal health.2 / 6Eating guava in winter is a different fun. Eating raw guava with black salt and red chilies enhances the taste. In addition, guava is also known for its many nutrients. Eating helps in weight loss, strengthens the immune system, and cures diabetes.3 / 6Pomegranate contains all the nutrients that are required for the better functioning of the body. These days you can eat a glass of pomegranate juice or salad daily. Also, it strengthens the immune system.4 / 6There is no doubt that strawberries are a storehouse of various powerful nutrients. It contains vitamins, fiber, antioxidants, and minerals. The biggest thing is that it does not contain cholesterol, calories, and fat.5 / 6Kiwi is a powerful fruit that can strengthen your immune system in winter. According to USDA data, just 100 mg of kiwi gives you 74.7 grams of vitamin C.6 / 6Grapes are considered a treasure trove of nutrients. It contains Vitamin-C and essential nutrients that are needed to strengthen the immune system.