Dizziness, lightheadedness, and confusion can indicate low blood sugar levels, a condition known as hypoglycemia. Dr. Vasundhara Aggarwal, a Senior Consultant in Neurology at Fortis Escorts Heart Institute, emphasizes that the brain relies almost entirely on glucose for energy, making it highly sensitive to drops in blood sugar. When glucose levels fall, the brain is deprived of its primary fuel, leading to symptoms such as dizziness, confusion, and irritability. The brain, which constitutes about 2% of body weight, consumes nearly 20% of the body's glucose supply, meaning even minor fluctuations can impact brain function. Common causes of low blood sugar include skipping meals, consuming high-refined carbohydrate meals, and intense physical activity without adequate nutrition. To manage hypoglycemic episodes, experts recommend consuming about 15 grams of fast-acting carbohydrates and rechecking blood sugar levels after 15 minutes. Preventive measures include eating balanced meals every 3 to 4 hours, monitoring blood sugar for those with diabetes, and managing lifestyle factors such as stress and sleep. Persistent symptoms should prompt a medical consultation to prevent serious complications.