Why can't I lose weight when I eat even less than my diet plan?

In order for someone to succeed in losing weight, the energy they consume needs to be greater than the calories they consume. This results in many being driven to extremely low calorie diets in order to achieve their goal. However, in such cases the initial loss may be satisfactory but gradually we are led to a stagnant weight. This happens as our body perceives this specific change and tries to adapt to it by reducing its metabolic rate to save the energy it needs for its normal function. So, wanting to protect us, our body stops further weight loss. In fact, the initial loss that has been noted is mainly due to loss of fluids and muscle mass. Therefore, a balanced, reduced-calorie diet plan is what is needed for successful weight loss that can be sustained over time.