Going for fewer calories is not always the best when it comes to your diet. Your recommended calorie intake is calculated based on your personal information like gender, age, current weight, height, physical activity level with an applied calorie deficit needed for weight loss. Not consuming a sufficient amount of calories can be harmful to your body and be a reason why you are not losing weight. Your organism is very smart. If you go below the amount of energy your body needs to burn at rest daily to carry out fundamental metabolic functions (breathing, ion transport, normal turnover of enzymes, and other body components), your body starts to preserve every bit of energy it can and not burning it for you to lose weight.