Nutrition usually calculates that 7700 calories consumes one kilogram of fat. Apple 100 g /50 calories, cucumber has no authoritative data, but it should not be higher than the evaluation. If you do as you say (only diet, no exercise). Your daily intake of 1500 is about 0.2 kg of fat. You can lose 1.4 kg a week. However, your way is more extreme and will affect your health. If you reduce your calorie intake, you will rebound more easily. For your own reference.

Generally speaking, adults need at least 65,438+0,500 calories a day to maintain their body function, because even if you lie still, your body still needs to be able to maintain body temperature, cardiopulmonary function and brain operation. Basal metabolic consumption varies with individual height, weight, age and gender.

Controlling energy intake and proper exercise are very effective ways to lose weight, and most doctors think it is the healthiest way to lose weight. This mechanism is very simple. When the daily energy intake is not enough to provide the energy consumed by the body, the body will call the sugar and fat stored in it. When fat is broken down and provides energy for the body, the process of losing weight begins. It should be noted that some doctors pointed out that the control of energy intake should be gradual to ensure that the human body can adapt slowly, and the energy intake per day is generally not less than 800 calories. Otherwise, the human body will make up for the lack of energy intake by reducing the body function, which usually leads to dizziness and fatigue, and the reduction of basal metabolic consumption will also affect the efficiency of weight loss. The total calorie intake of a normal person should be 2000 calories a day, and people who exercise can increase it appropriately.