Losing 500 kcal through diet or exercise can contribute to weight loss over time. It's roughly equivalent to a pound (about 0.45 kg) of weight loss per week, assuming a consistent calorie deficit. However, the significance of this amount depends on individual factors, and it's important to pursue weight loss in a healthy and sustainable manner. Consulting a healthcare provider or a registered dietitian is recommended before making major changes to your diet or exercise routine.