Some people go on a very low-calorie diet for rapid weight loss, often consuming only 800 calories a day. This type of diet usually includes special foods such as shakes, bars, or soups to replace meals and for added vitamins. Very low-calorie diets can help a person achieve weight loss of up to 3 to 5 pounds per week.
An 800 calorie diet can be safe if it provides complete nutrition. It can also be unsafe when it lacks any essential nutrient. One main advantage of medical meal replacements is they provide everything needed for health while providing much lower calories.
The 800-calorie rapid weight loss phase is safe for most individuals for up to 12 weeks, as long as you stick to our recommendations, drink plenty of water and use a multivitamin.
This makes the fast days a little easier (!) and consuming up to 800 calories is still effective for weight loss. The advantage of the 5 2 diet is that you only need to eat less on 2 days a week, which can make the diet easier to follow in the longer term than struggling to eat less every day.
The NHS advise that for the majority of us to lose weight in a safe and sustainable way, we should reduce our calorie intake to 1,900 calories for men and 1,400 calories for women. Dr Mosley claims that by following the rapid weight loss stage of the Fast 800 you may lose as much as 14kg over 8 weeks.
It simply takes time. Another common reason why people report not losing weight despite reducing their calories is that they don't give it enough time. Our bodies will do their utmost to hold on to our fat reserves and you often have to be in a calorie deficit for a while before you will see any meaningful weight loss.
According to the Harvard Medical School, the least number of calories that one can consume a day while trying to lose weight is 1,200 a day for women and 1,500 a day for men (5). In light of this, the 800 calorie diet is not a safe eating plan for anyone unless they are under medical supervision.
Very low-calorie diets (around 800 calories per day), cause rapid weight loss and increase the risk of gallstones, which may cause abdominal pain and require surgery.
As for the 700-calorie diet results, they are individual for every person. In general, you are expected to lose 3-5 pounds a week, which is more than normally recommended. You are not advised to engage into this or any other very low-calorie diet without a medical doctor's supervision because of possible health risks.
For those who need fewer calories, a 1,200 calorie diet is usually safe and potentially effective. The number of calories a person needs each day depends on several factors , including their age, sex, activity level, and body size.
However, calorie intake should not fall below 1,200 a day in women or 1,500 a day in men, except under the supervision of a health professional. Eating too few calories can endanger your health by depriving you of needed nutrients.
Please note, 800 calories a day (The Very Fast 800) is too low for those who are doing intense or endurance exercise. If you are doing intense/endurance exercise, you will require more energy than most.
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.
Some individuals try strict eating regimes, such as a 1,000-calorie diet, to lose weight quickly. However, drastically cutting calories does not typically result in sustained weight loss and can have harmful outcomes. Extreme diets have undesirable effects and do not result in sustained weight loss.
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.
Most people begin to see weight loss results in 3-4 weeks. If you're not losing weight in a calorie deficit you may need to adjust your stress levels, diet, and sleep patterns. Other reasons for weight gain during a calorie deficit are hormonal changes, aging, and other health conditions.
Effective At Weight Loss
If you need to shed pounds fast and don't expect the long-term result, the 1000 calorie meal plan may help you with that. As mentioned at the beginning of this article, this diet can help you lose 2-3 pounds (1-1.5 kg) a week, which is quite fast.
“Eating 800 calories a day has been shown to be particularly effective for weight loss because it's high enough to sustain you, so that you don't feel hungry and to allow you to get the nutrients you need as part of a healthy balanced diet whilst also being low enough to allow you to lose weight quickly and see other ...
Consuming at least 1,200 calories per day has often been touted as the minimum for basic bodily functions and to stay out of starvation mode, but the amount is actually too low. A healthy amount of calories for adult women ranges from 1,800 to 2,400 calories per day and for men it's 2,000 to 3,200 calories per day.
If 1,200 calories a day is more than 500 calories lower than your weight-maintenance calories, you can expect to lose more than 1 to 2 pounds per week. If it's less, then you might lose fewer pounds a week.
According to founder Dr Michael Mosley, those who closely follow the Fast 800 plan could see themselves lose up to 11lb in two weeks by limiting their daily intake to 800 calories a day. It's been praised, alongside the 16:8 diet, as one of the diets that work fast.