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:

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.
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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.


This sort of Diet really works. I’m 28 M and I’ve lost 65Lb following the same sort of diet.
After Uni I thought it was time for me to get back into shape, weighing circa 100KG at the time. What made it easier for me is the fact that I was at home for 6 months and manage to lose 30kg by sticking to 1 meal a day (around 1000 calories). I also had a workout plan, doing mainly push ups & pull ups.
The most difficult part was to keep my mind off food and in order to achieve this you really need to keep busy, either by watching some series from the beginning or anything else that doesn’t involve food.
I now weight 70Kg and I find it very easy to maintain the weight even with 3 meals a day.
Hope this helps anyone trying to lose weight.
Why can’t you do this if you have hypothyroid?
I would not.
does this work for all body types?
Yes the more weight you have to lose, the better it works.
Love this, thanks!! You are so funny, I really enjoyed reading
I’ve actually done this diet on and off for years now, didn’t know anyone else did this as well. I drink coffee in the morning with sweet n low no creamer and have dinner up to 800 call sometimes 600. The first time I did this I lost 40 lbs in 2 months and after I had my kids I lost 60 lbs in 4 months but you have to have the will power.
I’m 195kg have started today 800 calories using the optifast plan for a 12 week plan
These comments though! Fucking morons! Reading comprehension is your friend :p Just Sayin!
you are an utter fucking cunt – you have no understand of grammar.
hey be nice, everyone.
I’m excited to try this diet.
I love thgis guys aproch he makes me laugh all the time im going to do it not try i am away working constuction from my husband and cant wait to go home looking lkike a model so thank you. i will watch my caleries. and eat meat like a carnivor lol. thank you
90 days 0 food just juice. Caloric intake less than 400. 100 pounds in 90 days. Regular visits to the doctor to be sure I wasn’t killing myself.
That’s cool…but I would never recommend that to people.
Would I be okay if i broke my calories into two meals?
It’s not very practical but you could try.
I am gonna eat hard boiled eggs and steamed spinach!
is the key to this the fasting? or the low calorie intake? I work in a very active job, so I worry about stamina when I’m working.
if you have a very active job, this might not be best for you. The key is the low cal intake.
True. I’m definitely working out 9 hrs day at the 2nd largest retailer in the U.S.
This is why I visited this site, because I am concerned about how much I’m losing and if it’s healthly/normal. I do not eat healthy. I’m talking about 2 grilled ham, egg, and cheese sandwiches lathered in salted butter unhealthy. I definitely need a diet plan, but worries me is the fact with all the physical activity would a low calorie diet make me sick or light-headed. I almost feel that I have to eat a lot to replace what I’m losing.
Lol email this article!
Any examples of the heavy compound exercises?
squat, bench , deadlift, pull ups.
Squats, deadlifts, Bench Press, Bent over Row, Military Press
OK. Here is the deal. I am doing a restricted calorie diet. I DO break it up. I am NEVER hungry, although, I am tired. My key to success? I eat the same thing. Every. Fucking. Day. Boring as hell, but it works.
Breakfast 7am :
1/3 c all bran buds (80cal)
2 tbsp rehydrated PB2 (45 cal)
Black Coffee.
11am snack :
1/3c all bran buds (80cal)
2 tbsp rehydrated PB2 (45cal)
20oz water
Lunch 12:30/1 :
3 boiled egg whites (60 cal)
2c baby spinach (20cal)
1 red pepper (45 cal)
1 cucumber (40 cal)
lime juice (5 cal)
20oz water
Pre-Gym snack 3pm:
12 almonds (90 cal)
36oz water (before and during gym)
Dinner:
Grilled Chicken Breast 6oz (240 cal)
Roasted Broccoli 1c (75 cal)
40oz water
For reference: I am a 33 year old woman, 5’3″