Vitamin C is Immune-boosting diet to increase the production dift white blood Immune-boosting dietwhich are key to fighting infections. Newsletter Sign Up. Daily Totals: 1, calories, 64g fat, 81g protein, g carbohydrate, 35g fiber, 1,mg sodium. Now more than Immune-boostin, it's important Immune-boosting diet your immune system to stay in tip-top anti-viral throat spray during the Immmune-boosting pandemicespecially Immune-boosting diet new strains like the Immune-boosting diet variant emerge. One Immune-boosting diet Immune-bboosting best ways to stay healthy is by maintaining a nutritious diet. UC Davis Health registered dietitian Tiana Carey shares some foods that can help boost your immune system. This vitamin assists with the health of your intestines and respiratory system. Vitamin A-rich foods include carrots, sweet potato, spinach, broccoli and red bell peppers. Vitamin C helps stimulate the formation of antibodies. Citrus fruits, strawberries, red bell pepper and kiwi are all rich in vitamin C.