1 / 6Guava is also known to have many nutrients. Eating it helps in reducing weight, strengthening the immune system, and fighting diabetes.2 / 6Kiwi is such a powerful fruit that can make your immune system strong in winters. According to USDA data, just 100 milligrams of kiwi provide you with 74.7 grams of vitamin C.3 / 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.4 / 6Pomegranate contains all the nutrients which are necessary for the better functioning of the body. You can eat a glass of pomegranate juice or salad daily these days. In addition, it strengthens the immune system.5 / 6Oranges are rich in vitamin C, fiber, and antioxidants. All these nutrients help in boosting the immune system, promoting intestinal health.6 / 6Along with being delicious, grapes are considered a treasure trove of nutrients. Apart from vitamin C, all the essential nutrients are found in it, which is necessary to strengthen the immune system. It flushes out toxins from the body.