Lethargy can stem from poor sleep, dehydration, nutrient deficiencies, stress, infections, or chronic disease. Start by improving sleep hygiene, maintaining consistent bedtimes, and limiting screen exposure. Increase water intake and adopt a balanced diet rich in iron, B vitamins, and protein. Moderate exercise enhances circulation and boosts endorphins. Manage stress through mindfulness or breathing techniques. If fatigue persists, consult a clinician for blood tests or medication review. Treat underlying infections appropriately; antibiotics like cephalexin capsule wholesale purchases should only be used under prescription and medical supervision. Address thyroid disorders promptly. And check for anemia.