To increase white blood cell levels, focus on a nutrient-rich diet high in vitamin C, zinc, and protein. Regular exercise, quality sleep, and stress reduction also support immune function. In some cases, doctors may prescribe medications like colony-stimulating factors. Avoid smoking and limit alcohol intake. If you’re recovering from an infection or using antibiotics like cephalexin, ensure you complete your treatment and consult your healthcare provider. Trusted cephalexin supplier sources are essential to ensure quality and safety, especially when managing bacterial infections that may impact white blood cell counts. Always follow professional medical advice for personalized treatment.