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.


Hi, I’m just wondering about the exercise thing. Do you mean that cardio would be totally useless in a diet like this? What would happen if you didn’t do the exercise, and what would be your weight loss? Or, what would happen if you did light cardio (maybe burning 500 calories three-four times during the week) rather than working with the weights? Thank you!
Not useless but potentially harmful since you’re running on so few cals. I’ve never heard of “light cardio” burning 500 calories. Most intense weight lifting sessions don’t burn more than a couple hundred.
Im 16 and i really need to lose weight i am not happy at all and no diet has worked for me any suggestions?
Make healthier choices. Eat more fruits and veggies, start getting more active, play a sport, lift weights.
DO NOT do this diet.
I have 2 weeks to lose at LEAST 15 lbs. What do I do and eat for the 2nd week?
You WILL FAIL if you think this way.
Why 2 weeks? What happens in 2 weeks? Do you have a bomb strapped to your chest that will explode if you don’t lose 15 pounds.
Take a longer term approach where your calorie intake is around 10x your bodyweight in pounds in your second week.
Thanks for this! And by the way LOVE your humor!
Thanks Kelly 🙂
I really want to lose weight quickly for a function I’m attending on Saturday coming so I really want to give this a shot. I’m new to this so could you tell me what type of weight excersises I should be doing with what weight and for how long please
Trying this diet starting today, wish me luck
Would like to know how it’s working for you? I May Try myself.
Wishing you best if luck!
I am going to try this…how is it working for you?
Thanks for this awesome diet! However, i do not intend to go to gym for several reasons. Is there any suggestions for home-based exercises?
If you have a set of dumbbells and a bench you could.
Just google some core exercises for each major body part and do 2-3 sets each.
Hey! nice diet plan tho ..
Im going on a vacation on 22th, its the 9th today, and i would like to loose as much weight as even possible .. Its by the fact that im going with my boyfriend, and i havent seen him for about 3 months, and in that time i gained some weight … and he likes when im super slim! near skinny.
Do you have any suggestions? that means i have about 2 weeks, and i actually have planed to work out on a daily basis in the morning, before i eat my breakfast, but i think its hard to make a real diet plan, for breakfast, lunch and whatever … do you have any websites or links that you would prefer?
I am about 174 cm, and my weight is 60 kilos… normally i’m about 55 kilos, and that is where i’m happiest with myself after all, so that is my ” goal”.
2 suggestions:
1. If you’re doing this for your bf, you need a new bf.
2. No I don’t really do exact step by step diet plans, as I find them too restrictive and most people end up modifying them to the point they’re nearly unrecognizable. Stick with lean meats, fruits, veggies.
btw, i liked your facebook post (y)
Can I loose 8 kg in a week with this method.
Probably not.
Hi Keith
Thankyou for this plan. I am going to do it.
I was at 225 and now 6 mos later I am 175.losing about 10 lbs a month. I hv been consistant on walking at the park 3.5 mi 3-4 times weekly and cut out breads,cereals, sweets pastas and eat lots veggies, fish, meat, nuts
Berries citrus. I dont crave the sweets like i use to. My waist measurement went from a 54(yes 54″) to 38″ now I drink 64-80 ozs of water w braggs organic apple cider vinegar. Needless to say.its taken alot of perseverance n dedication to improve but I feel really good. My goal is to lose 100
So I have 50 left.
Thankyou for your article and after I will try the other 25 day program
Suzana
Should i be trying to drink more water during the week or less? I already drink about a gallon or more a day and was just wondering if that is good for this diet or if i should cut back.
Thanks. Starting this tomorrow. Will bookmark and let you all know how I have done. My stats as of today. Female, 5’4, 166lbs. Am a stress eater so I will occupy my computer and play some games instead of raiding my kitchen. I hit the gym daily but never have done weights just…..treadmill…. Lets do this. Thank you.
Excited to try this! I do crossfit 3 times a week usually…. Would this be too intense with such a low calorie intake?
Eh…probably.
You could aim for a 8-10x multiplier for your calorie intake (8-10 times your BW in pounds) and still see great results.
You are so cruel to post that steak when you know people who visit your site are on strict diet, maybe not all but I’m on it. LOL. I now want to forget how I am so determine to get back into shape! Haha.
But steak is amazing.
I like steak and it’s allowed!! I think it looks yummy!
Isn’t 800 calories too much? I have 103 pounds and aiming for 90
Did you just say 90 calories?
Haha, no I said I’m aiming to get to 90 pounds and I was asking if 800 calories is too much to get there. Sorry, english isn’t my first language.