Extreme Weight Loss (2022): How Much Weight Can You Lose In A Week?

July 7, 2022 | 3727 Comments


how much weight can you lose in a week without eating

Important note: Please advise your doctor before following any plan. Don’t follow the advice below if you are under 18. 

People always ask: How much weight can you lose in a week?” Well… to answer your question I have good news, awesome news, and bad news.

First onto the good news: YOU CAN LOSE A TON OF WEIGHT IN ONE WEEK

That’s right, you don’t have to be bound to the conventional wisdom of only losing 1 or 2 pounds a week. Extreme weight loss diets can definitely work, but only for a short period of time.

In fact, you can lose up to 15 pounds in one week if you do it correctly.

Now onto the awesome news: ALL THAT WEIGHT YOU LOSE WILL BE WATER AND FAT, NOT MUSCLE

Yup, you read that correctly, if you follow the methods at the end of this post, all the weight you lose during the week will be pure body fat. The conventional statement that losing more than 2 pounds per week leads to muscle, organ, and hair loss is absolute unicorn shit.

How do I know this? Because some awesome scientists from the American College Of Nutrition back in 1999, conducted a study, which tested 2 groups of people for 12 weeks.

One group only did traditional cardio, while the other group only did weight training. Both groups ate 800 calories a day. At the end of the study, both groups lost large amounts of weight, but the one that only did cardio lost large amounts of lean muscle mass, and the one that only did weight training didn’t lose any muscle mass at all.

So there you go, some hard hitting scientific facts that prove that you will not lose muscle during extreme dieting as long as you lift weights.

Note: And if you don’t have a gym membership or if you don’t have access to any weights, then doing a well-designed bodyweight program like Bodyweight Burn is your next best option.

And lastly, the bad news: YOU HAVE TO EAT VERY VERY LOW CALORIES

So yeah…. you have to eat a ridiculously low amount of calories to lose a lot of weight in a week. I’m talking along the lines of 800 calories a day.

The amount that would make any nutritionist hang themselves.

And now, onto the plan, but first, a picture of steaks:

How much weight can you lose in a week protein
I didn’t want to put a boring picture of a scale, so here’s some delicious steaks. I’m guessing this isn’t the best article to put this picture in

The 2-step plan to lose the maximum amount of weight in a week

Please note that the following plan can be used by both men and woman.

And don’t do this plan if you’re under 18, you’re way too young to be eating such low calories.

I guarantee that if you follow the plan below, you will lose 10-15 pounds(water and fat) in one week:

1) For one week only, eat 800 calories per day.

2) Workout 2-3 times per week with weights. Make sure the weights are heavy and be sure to hit all body parts.

That’s all.

Some notes/tips about the above 2 steps:

  • 800 calories is very little food, for any man, woman, or baby walrus. Because of this, I suggest that you only eat 1 meal per day a la Brad Pilon’s Eat Stop Eat. If you eat one 800 calorie meal per day, then you’ll at least feel somewhat satisfied, but if you split that up into 3 or even worse, 6 meals per day, then you’re not going to fare so well on this one week venture. Yes, this means that you will be fasting 24 hours every day for a whole week. Just remember, you will be burning fat, not muscle.
  • Whenever possible, eat higher protein and eat foods with high water content such as fruits and soups. Also, drink lots of coffee and green tea, since they both tend to blunt hunger quite well.
  • Stick with heavy compound exercises when in the gym. That means no curling and crunching, and if you even step foot on a treadmill, my dumbass radar will go off and I may have to kill you.
  • If you can’t lift weights, then your next best option is to do some sort of bodyweight training. You know…exercises like squats, push-ups, lunges, pull-ups, sit-ups, etc..
  • This is a mental game more than anything else. When you’re eating very few calories to lose weight faster, your mind starts playing tricks on you. Your stomach is gonna be grumbling more often. And there are gonna be times where you want nothing more than to self-sabotage yourself. Which is why the next point is so important.
  • Above all, keep yourself distracted and out of the kitchen. If you’re constantly prancing around the kitchen and thinking about food, you’re going to fail. So keep yourself busy. Read a book, play some video games, take a nap, work on your tan, or shave your pubes. I don’t care. Just do something that doesn’t involve food.
  • [EDIT 10/6/2014] I should also add that your protein intake needs to be HIGH. Like really high. In fact, the majority of your calories should probably come from protein, fruits, and veggies if you want this diet to be effective. The protein will help keep you full but more importantly also help maintain muscle.

Remember, this is only for one week

I just wanted remind you all, that this sort of extreme weight loss plan is only a temporary plan.

The results don’t have to be temporary, but the plan is. Please do not try and do this weight loss plan for more than a week.

Doing so is really going to mess with your head and you’ll most likely binge back to your original weight.

After one week, transition to a more moderate weight loss plan for the long haul.

I hope you guys now know how much weight you could lose in a week if went balls to the walls.

Want even better results? Take it to the next level with Fat Loss Boost

Many people have been asking me, “Can I do this for more than 7 days?”

Uh…

Yes and no.

Technically, you could eat 800 cals per day for a sustained period of time.

But sooner or later it’s gonna backfire on you.

If you want a more sustainable rapid fat loss plan…

Then I highly recommend checking out Fat Loss Boost.

This is a more long-term approach than the strategy I outlined in this blog post.

It’s a strategic rapid fat loss diet that works in 14 day cycles.

So you go hard on the diet for 14 days, lose a crap ton of weight, take a break, and repeat.

And the results from Fat Loss Boost are even better:

“I have been able to lose 10 pounds using this program. Starting weight 186. Weight this morning was 176.”

“I lost 12 lbs for my first attempt. Started at 201.7 and ended at 189.9. I am amazed!!! Thanks to everywhere for all the support and great hacks.”

“Ok people I’m done 😀. I hit 171.8 today, my goal was to break 172 on this round which was what I weighed almost ten years ago (lowest as an adult). That’s 30.2 lbs in just under 3 months.

Pretty crazy, right?

Definitely give it a look if you want a realistic, yet challenging plan that burns fat faster than anything. you ever tried before.

Check out Fat Loss Boost

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Questions? Like steak? Let me know down below.

I respond to (almost) every comment, which is pretty crazy considering there’s been over 3000 comments. Sigh…I need a hobby. 

3727 Comments - Leave Your Thoughts

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  1. Hi I’m 60 kilos and 5.5inch …I seemed to have gained this horrible tummy fat and need to get back down to about 54 kilos …? Can I do this in a week …?

  2. hi keith!
    1. does this only work if i have ‘weight to lose’ – i’m not overweight but i’d like to lose 10lbs
    2. how would you suggest transitioning from this diet to best maintain the weight loss

  3. Hi
    Just seen some wedding photos of me taken on Friday past…I look and feel horrid that I’ve put on so much weight. Going away at the end if June on a family and need to lose weight fast. I’m 5ft 8 and weigh about 190 lbs. Want to loose 30lbs can you help

  4. Hi! I am a single mother of two/ college student that works full time as well. After a knee injury a couple of years ago, and subsequent issues with the other knee now, plus everything else that I have on my plate, I am possibly the unhealthiest I have ever been. I strive for a vegan/ vegetarian lifestyle because I just feel better when I do and I believe that it has helped me to get rid of all of the medicines that I used to take for blood pressure, thyroids, etc.
    However, I have tried keto (and quite literally everything else under the sun) and found it to work but not be sustainable/ affordable for long. I simply have no time or money for trips to the gym or expensive diet food or pills. I am currently 34 years old and pushing 300lbs. I desperately need to eat healthy for me and my kids. Any advice would be greatly appreciated. Thanks!

    1. this is a super loaded question and one that’s very much dependent on your current habits and lifestyle. The “simple answer” is to improve slowly 1% each day and focus on improving your habits vs searching for quick fixes. This diet can work but only if you view it as a “jump start” vs. a quick fix.

    2. Kelly,

      Look up the 800 blood sugar diet by Dr. Mosley and the clinical trials in the Newcastle study in the UK. It reverses prediabetes/ diabetics type 2 and you lose a lot of weight in the process but it’s a very strict protocol and takes a bit of time. Good luck!

  5. Hello,

    I have a fight coming up in less than 2 weeks and I am currently 180lb and I need to be 165 fight. However, does this plan help. I do train everyday for 2 to 3 hours.

  6. Hi keith,
    So I’m 60 kg and 160cm tall and i wanna lose 8 kg. How many kg will this diet help me lose in a week

  7. Hi Keith I’m a 20 year old mom of a two year old and I have tried everything from diet pills to Chinese weight lose patches and I can’t lose the baby gate I was 130 not I’m 210 I need to know if this will help

    1. if you eat fewer calories than you burn you will lose weight. 99.9999999% guaranteed. You’re eating too much right now. This diet is not magic.

  8. I know it’s said if your under 18 not to do this but I need to lose weight…
    My parents for years has been feeding me unhealthy and had no time to take me excersizing and I had to do it on my own without a gym and now thanks to them I have insulin resistance at 16 I’m trying to lose weight so I can stop it from turning into diabetes. Right know I’m 5’5″ and 228 pounds and to be in the hundreds would make me extremely confident in my self image and even more so my health. The meds I was taking really made me gain weight and luckily I stopped taking them but now I’m stuck with this stupid weight that won’t go away. I’m drinking water and getting sleep and even eating in good proportions yet I still won’t lose the weight I keep on struggling to think if maybe it’s the exercise but I’ve been doing that for the past 4 months and no progress.im not doing the treadmill and not doing anything yoga like bc lol I’m not flexible and treadmills hurt my knees.would this be good for me or do you know something I can try..I’m honest sick and tired of my body at this point and the stuff I have to put up with

  9. Can this plan be done once every four weeks combined with keeping with a consistent change in habits and regular exercise that includes cardio in between?

    1. if you consistently change your habits in a sustainable matter, you won’t want to do this plan 😉 Trust me.

  10. Hi Keith. Going in for a tummy tuck and for it to be approved I have to be at s 30 or less bmi. Right now I’m 34. How van I get down to 30 in less than 3 weeks….
    Please help

  11. Hello I’m currently 25 last I checked i was about 225lbs I’ve been told I need to get in better shape due to high ldl and triglycerides will this plan help with lower those as well as the weight?

    I plan on only doing this for a week and also plan on doing 30 minute walks a day for a cardio only workout but just curious as to see if this could help thank you.

  12. Been consuming 800-1100 calories/day for 4 weeks, high fat and protein (think keto), while also incorporating IF. Strength train nearly everyday. Haven’t lost a single pound, nor inch. Wish this worked for everyone.

    1. if you didn’t notice any change in weight or body composition, chances are you’re not in a defcit. Unless you weigh like 110 lbs and want to get down to 100 lbs, then that’s a different story.

    2. Man that’s crazy I’ve only been doing this for two days, today is day three and I went from 182 to 177. I haven’t worked out yet 🙁 but at one of my jobs which was the first two days I started I work the girl and by a pizza oven I guess it would be called but it’s open flames and I have to go up and down the stairs carrying food so I run up and down them through out an 7 hour shift and I wore my waist trainer for one of those days. So you might not have a lot of fat there honestly

        1. hey Ruthie sorry for the late response but really I have been eating soup. and that’s about it besides veggies. I also had been drinking at least 9 cups (8oz sizes) of water. I am sure if I had worked out it would have shown even better.

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