No, it is not. The 900-calorie diet plan can be referred to as a very-low-calorie diet. Very low-calorie diets, aka VLCDs, are eating plans that restrict caloric intake to 800 to 900 calories per day. For an adult, such small quantities of food cannot give you enough energy to properly sustain you.
What happens when you only take 900 calories a day? Your body starts to consume your muscle and hangs onto your fat. At some point, you start to become weak and your organs start to suffer. One should NEVER eat fewer than 1350–1400 calorie a day.
If you drastically slash calories and are eating a very low-calorie diet (Think: less than 1,000 calories for women and less than 1,200 calories for men), “starvation mode” can actually be starvation. Starvation from chronic undereating can be counterproductive to weight loss and dangerous to your health.
A 900 calories diet plan for weight loss can be implemented to drop approximately 4 to 7 pounds a week. It should ideally incorporate all food groups in order to maximize their nutrient content.
As a general rule though, most nutrition experts recommend never going below 1,000-1,200 calories a day if you're dieting on your own. It's also worth bearing in mind that the body doesn't suddenly 'enter' and 'leave' starvation mode, like crossing the border from Devon into Cornwall.
However, other studies show that while consuming 1,000 calories a day may result in significant weight loss, most people cannot sustain it and often experience significant weight regain . The reasons include regaining lost muscle mass and increased appetite.
I am eating 900 calories per day but why am I gaining weight? Your body responds to your under fueling with slowing your metabolism and saving fats cause you put your body into starvation mode. If you keep it your body will eat your muscles and the fat you have will seem even worse without the muscles to “carry” it.
With a 900 calorie diet, you can lose more than two kilos weekly. Indeed, an exact figure cannot be given, as it will not be the same for each person. If, in addition to diet, we help a little exercise, even if it is not very intense, we can exceed three and a half kilos per week.
As starvation progresses, the physical symptoms set in. The timing of these symptoms depends on age, size, and overall health. It usually takes days to weeks, and includes weakness, fast heart rate, shallow breaths that are slowed, thirst, and constipation. There may also be diarrhea in some cases.
An ideal daily intake of calories varies depending on age, metabolism and levels of physical activity, among other things. Generally, the recommended daily calorie intake is 2,000 calories a day for women and 2,500 for men.
In addition, consuming as few as 800 calories daily may not give you the energy you need for daily living and regular physical activity, especially if you eat the same foods every day. Talk to your doctor or dietitian to make sure you get the nutrients you need while on a very low-calorie diet.
But first do one first, either get lean or get big and muscular. You can't do both at the same time. 900 calorie deficit is bit more and chances are high to lose muscle.. keep it between 300–500 cal deficit.
The diet doesn't have enough calories
Eating too little — say, 1,000 calories a day — can prevent you from losing weight, too. "When you don't eat enough, your body is starving and it's not going to lose any extra weight" because it needs those energy stores to keep you alive, Fakhoury said.
The most important thing is to make sure you are eating enough calories each day. You may also need to adjust your diet so that you are getting more protein and carbohydrates. In addition, it's important to stay active and exercise regularly.
Most of us would not be able to sustain a 900-calorie diet plan for more than a week, let alone for a whole month without medical support. Rapid weight loss is also not healthy, and its results are hard to maintain over time.
The OMAD diet, like other intermittent fasting diets, may help with weight loss. But since it allows only one meal in a day, it can make meeting nutrient needs difficult and potentially cause adverse health effects.
1 pound (around 0.5 kg) is about 3500 calories (5), so if you stick to a 1000 calorie meal plan, and your normal needs are 2000-2500 calories per day, you may burn as much as 7000-10 500 calories per week, thus losing from 2 to 3 pounds (1-1.5kg) a week.
When starved of energy, the human body responds in a way known as “Starvation Syndrome”. Starvation syndrome (or semi- starvation) refers to the physiological and psychological effects of prolonged dietary restriction.
Ordinarily, the body responds to reduced energy intake by burning fat reserves and consuming muscle and other tissues. Specifically, the body burns fat after first exhausting the contents of the digestive tract along with glycogen reserves stored in liver cells and after significant protein loss.