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. I recently started restricting myself to 1000-1200 calories a day..And most of my food intake is fruits,vegetables and chicken.
    Have cut down on sugar totally,havent been able to exercise since i recently developed ulnar nerve compression in my right hand.
    In just 12 days i have lost 4 and a half kgs
    Is it normal or am i losing muscle?

  2. Hi Keith,

    I need your help. I’ve been struggling with my weigh. i have PCOS and bordel line hypothyroidism. Can this 800 calories really help me the extra weight. I need to lose a stone and half. Thanks a lot

    1. Yes you can, I to have pcos and it’s recommended we eat high protein, no sugar, no dairy, limit carbs as much as possible and only consume wholemeal/wholewheal foods, go for low GI foods as well, I’ve been on a 1200 way of eating since 2017 September and have lost 3 stone 🙂 I went to the gym 3 times a week done a mix of cardio and weights 🙂 it’s also recommended we who have pcos to do HIIT workouts 🙂 I’ve just started with my weightloss again, good luck!

  3. I am going to start this 800 calorie diet tomorrow. I need to lose 80 lbs. Hopefully I will get a great kickstart with my first week eating this way and will gradually add things in the following weeks. I will keep you posted on my progress. Currently 218 lbs.

  4. Can you do meal replacement shakes?
    Low calorie 30g protein??
    I need to loose this weight quick
    I’ve gained so much eight after being off herion for 2 years

  5. Hi Keith!
    I’m getting married in 3 weeks. Would you consider me sing the 800 cal the week before? I am currently doing 1300 cal a day. Also how long or how many workout should I do in a day? Thank you!

  6. Iv’e been doing this for a whole week but instead of weighing myself I have been measuring myself and I am getting smaller. Only about 650 calories per day. But I eat about six times per day. I hope I can stick to it….Also exercising everyday. They go hand in hand. Exercise and Diet.

      1. Keith I current weigh 125 and would like to be down to 110 before I see my bf this weekend. I am 5’3″. How many calories can i eat? If I just eat vegetable soup for every meal, will it be okay. I dont know how to calculate calories.

        1. Not gonna happen at your weight, sorry. It works best for people who have more weight to lose. YOu’ll still see fast results but not 15 pounds.

  7. Hey, I am a little confused now. I just finished my 800 kcal week and I “only” lost 5 pounds. I weighted literally everything (even apples and measured the milk for my coffee) and went to the gym twice (yes I did some cardio, but only because my chocolate reduction made me have much more energy 😀 ) and worked out with weights. I only ate one of those 7 days more than 800 kcal cause I made a banana-milkshake/smoothie. Why did I lose so little? (btw. yes, coffee and water totally became my best friends!)

  8. Hello Keith!

    I am 5″3 and currently weigh 58 kg (128 pounds). I would like to be at 52 kg (115 pounds) in exactly 4 weeks. Do you think this is doable with an 800 calorie per day diet, or should I be eating even less? I am vegan so my diet consists mainly of veggies – I eat almost 3 cups of cauliflower or broccoli for lunch, sometimes with tofu, rye bread and avocado or peanut butter for breakfast and a soup for dinner.

    Thank you for your answer!

  9. I did this for a week, only ate 2 bananas and a cup of coffee in the morning, and cooked veggies with beans (for protein) or chicken with veggies in the afternoon nothing else after 1pm. (Fasted 18-19 hours) At the gym I did 15 minutes of elliptical, 40 minutes on leg/arm weight machines, then another 10 minutes on elliptical before I left the gym. I went to the gym Monday-Thursday (4 days).
    I’m 27 years old, hieght 5’0. When I started Last Monday morning I weighed 141.8 lbs .. by the end of the week (Sunday night) I weighed 140.5.. I only lost 1 lb I’m so sad and disappointed this didn’t work like I hoped It would. Why didn’t this work for me? I felt like I put in my all for this.

    I’m going to try another week. Or until I make it but Starting next week cus I gave up these past 3 days (didn’t binge but did have rice and tortillas with my 3 meals Monday yesterday and today) I want to get back to 125 lbs in 2 months. Is this really possible? The lady in the gym told me To try fasting completely only drink water no eating at all for 3-7 days but I don’t think I can pull that off I can try but I really need this, I feel overweight, unhealthy and unhappy ‍♀️ summer just started and I feel disgusting.

    1. hard to say exactly why. Have you dieted extensively in the past? If so, dropping cals even further prob wouldn’t help. You could try eating at maintenance levels for a bit then trying this again.

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