Reducing belly fat solely through diet, without exercise, is challenging and less effective. It's a common misconception that one can achieve spot reduction, i.e., losing fat in a specific area like the belly, without affecting the rest of the body. In reality, weight loss tends to be systemic. A balanced diet can certainly help in creating a calorie deficit and lead to overall weight loss, which includes the belly. However, incorporating exercise, especially a mix of cardiovascular and strength training, not only accelerates overall fat loss but also helps in toning and strengthening the abdominal area. Remember, a holistic approach to weight loss, combining a healthy diet with regular physical activity, is key to effective and sustainable results.