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. Im 36 was on some meds and had the runs 1 week barly doing brat diet to try to get back to eating. On dec 7th I was 183pds 5″1 now as of jan 2 I am 173 I can see i lost weight just on fluids that week.what can I and should I do as of exercise to keep lean and healthy? And what kind of meals im horrible at all this.please help .

    1. exercise can be as simple as going for a walk 20 min a day. The key is to keep consistent with something and gradually build up over time. If you’re following this plan, I recommend you to get 90% of your cals for the week from protein …. like chicken breasts and/or protein shakes + a little fruit and a lot of veggies. It’s extreme hence the title of this article 🙂

    1. do 1 week first. Remember, it took you years and years to gain weight. Don’t expect to undo everything in a week or even a month.

  2. I am a female of 58 years old and weigh 170 pounds I am 5ft tall and would like to lose weight and would like to do 800 calories a day diet.

  3. I’m trying to cut weight quickly and have already started something similar to this method. I’m not a particularly muscular person as it is and I really enjoy running. If I’m not worried about losing muscle mass, is it safe to continue running (solely, or in addition to weight training?)

  4. Hi. I’m going to try the 800 cal diet for 7 days starting tomorrow. On D7 I have a half marathon, will this still be okay to do? I’m 5ft 5 and 300 llbs 58 year old woman

    1. that’s a really vague question. A lot of mental/emotional work likely needs to be done. And you’re likely not going to lose 50 lbs in 3 months. Aim to lose 10 pounds first and go from there. Small and steady progress is better than anything else.

    2. Does maintaining muscle mass prevents you from being “thinner”?
      Some of my clothes are too tight but if I keep the same muscle mass I have now, would jeans still feel tight?
      (I’m a female btw).

  5. I gained over 50lbs in 5 months. I didn’t understand why because I was eating alot less food than I normally did. I usually could eat whatever I wanted and not gain an ounce. I am 50 years old, I was prescribed a medication to throw me into menopause. I found out that the medication I was put on was the main reason for the horrible gain. I am now off of it, how can I get it off as fast as it on?

    1. if your body is working like normal, then you should be losing weight relatively fast if you follow this plan. There’s no secret to this, it’s just consistently eating fewer calories than you burn.

  6. I just started the 800 diet three days ago. I’m 35, 5.8” and 183lbs( now ) and my goal is to get back to 140lbs like the good ol’ days. I’ve also been going on typically 3 mile hike/sprint bursts and some light exercises at home like planks, push ups, arm curls… I read that you can do this diet for up to 12 weeks. Is it possible to reach my goal in 4 months ? I’m already pretty used to the low cal meals.

  7. I’m 5’6 female I was 145 lbs my whole life , quit smoking and gained 50 lbs In just 4 months. Can I lose the weight as fast as I put it on. I hate to look at my self in the mirror anymore I have actually thought about starting smoking again I don’t eat as much when I smoke

    1. That’s highly unlikely. You don’t just gain 50 lbs out of thin air. You can lose the weight, but plan on it taking more than 4 months.

  8. Hello
    I’m 5’3ft and 145 pounds with a kind of sluggish metabolism.
    Are the 800 calories one size fits all? I guess it’s not same for someone who’s 6ft to be on a calorie deficit at 800 calories as for someone who’s 5’3ft.
    Should I got even lower then?

    Also, if I keep eating 800 calories a day (mostly vegetables and proteins) for a week and do some bodyweight exercises, how much weight should I expect to lose? Closer to 10 pounds or 15 pounds?

    1. 800 cals isn’t perfect but it’s a good starting point for 99% of people. If you weigh more to start, you’ll lose more with this plan. But even if you’re 145 lbs, you’ll also lose a lot.

  9. Hey Keith, love your bluntness in this article. No one likes sugar coating when it comes to this stuff. Anyways, my wedding is in 2 weeks and i can’t seem to get down to 190(Current weight is 205). Will following your plan really help me lose 15lbs before June 6. I don’t have a gym membership anymore however i have resistance bands at home. Most of the weight is in the gut area and i need to get rid of these “love” handles. Will it target that as well?

    Thank you.

    1. Congrats! I cant gurantee anything but if you follow this plan you will lose a lot of weight. Don’t focus so much on the scale and focus more on simply following the plan. The results will show in the mirror if you do.

  10. I am 5”2 and 120 lbs I want to lose 10 lbs as fast as possible. Would this diet work for me? I have been doing 30 min cardio 6 days a week, and 30 strength training 3 days a week, no results. Would I be able to lose 10 in week with this diet?

    1. You likely would not since you already dont weigh a lot. Doesn’t mean you should do it, you’ll still see results, they just wont be 10 lbs.

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