Question: how to increase wbc in one day?
Answer: Vitamin C. Eating Vitamin C will help regulate the levels of white blood cells in your body. Fruits like lemons, oranges, and lime are rich in vitamin C, and so are papayas, berries, guavas, and pineapples. You can also get vitamin C from vegetables such as cauliflower, broccoli, carrots, and bell peppers.