Ten Popular Diets — Which Work and Which Are Hype?

100+ pounds lost on The Slow-Carb Diet®.

If you want to lose fat in 2014, how about we do it together?  I need to work off some Danish butter cookies.

Last year, the Lift team helped me test The Slow-Carb Diet® with 3,500 readers.  The result: 84% of people lost weight and the average weight loss was 8.6 pounds over four weeks.  Many people lost more than 20 pounds.  This didn’t surprise me, given the case studies of people who’ve lost 100+ pounds.

Working alongside UC Berkeley, Lift is now launching the largest study of popular diets ever performed.  You can choose from 10 different diets (Paleo, vegetarian, gluten-free, etc.), and the study includes control groups and a randomized trial.  The Slow-Carb Diet is one option.

I will be participating, cheering you on…and advising.  Here’s what you should do today:

  1. Download the Lift app for goal tracking and motivation. Lift now has Android and web versions, along with the original iPhone version.
  2. Visit the Quantified Diet homepage to choose your diet, or to be randomly assigned to one.
  3. If you choose the Slow-Carb Diet, join the community at 4HBTalk or Reddit for support.  I will pop in every once in a while to check things out.  I’ll be following the diet with you, in addition to using biochemical cocktails I’ll share later.
  4. If you want the full monty, get The 4-Hour Body.  You can lose a ton of weight without it, but the details in the book will prevent you from stalling and make everything faster.

For more background on this study, I asked Tony Stubblebine, CEO of Lift, to tell the story.  Here it is!  It’s a quick read, and I suggest it…

Enter Tony

A year ago, we ran 3,500 readers of Tim’s blog through a four-week study of the Slow-Carb Diet, tracking their progress through Lift.

The results were amazing: 84% of people who stuck to the diet lost weight and the average weight loss was 8.6 pounds over four weeks.  Those stats are crazy, right? Some people lose 100+ lbs going Slow-Carb, but I never dreamed that people’s success rate would be so consistent.

After seeing the results, I wondered whether people fail to adopt healthy habits due to lack of independently testing.  Getting people to change isn’t just about giving good advice; it’s also about giving them confidence in the advice. Our study showed that Slow-Carb definitely works. But what about the rest of the diet world?

As soon as we published the Slow-Carb Diet results, a young researcher at UC Berkeley reached out.  The proposal: that we turn the Slow-Carb Diet study into a full blown scientific research project, or, as he coined it, “The Manhattan Project of diet research.”

Tim is unique, in that he had the vision and the guts to put his diet to the test. Very few (probably zero) other diet authors have tried this.  What if we could replicate this on an epic scale with other approaches?  Real objective data?

Unfortunately, academia doesn’t move fast enough to keep up with popular diets. By the time a study comes out, we’ve all moved on to the next thing. The research that we did on The 4-Hour Body was pioneering in its speed. Tim and I conceived the study in October, ran it in November, and published the results in December.

Taking that rapid, crowd-sourced approach to diet experimentation would be like dropping a nuclear bomb on the existing diet industry. This sort of research could completely change our notion of what works…and for whom.

Our UC Berkeley advisors had just one concern: we had to get more rigorous about our experimental design.

This second study, which we’re calling The Quantified Diet Project, includes a comparison of ten different approaches to healthy diet, a control group, and another group going through a randomized trial.

With your help, we can start getting scientifically-valid measurements for all popular diet advice.  What works and what doesn’t?  The results might surprise you.

When you join, you’ll be presented with ten approaches to healthy diet, along with two control groups. All of these approaches have been vetted for healthiness, but you’ll have a chance to opt out of any that don’t fit your lifestyle.

And, of course, if you are a strong believer in The Slow-Carb Diet, you can go straight to that option (Slow-Carb obviously works).

This is a chance to lose weight, increase your health, boost your energy, and make a real contribution to science.  Join the Quantified Diet Study today!  It could change your life and change how scientific studies are performed.  Win-win.

Here’s to an incredible 2014, starting now,

– Tony Stubblebine
CEO & Co-founder the Lift app
Advice, motivation, and tracking for more than 100,000 goals.

The Tim Ferriss Show is one of the most popular podcasts in the world with more than one billion downloads. It has been selected for "Best of Apple Podcasts" three times, it is often the #1 interview podcast across all of Apple Podcasts, and it's been ranked #1 out of 400,000+ podcasts on many occasions. To listen to any of the past episodes for free, check out this page.

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Steady
Steady
9 years ago

Hey Tim,

I love your blog and your book I have currently read the 4 hour work week and the 4 hour body. Im also a fitness enthusiast like you are and was wondering what your opinion is on intermittent fasting. The slow carb idea for me personally is great for losing fat but for muscle gain its very difficult. I followed Martin Berkhams Lean Gain workout and I had great results. I gained muscle at a rapid pace while my belly seemed to be slimming in. Obviously everyones body is different. I was wondering have you tried Martin Berkhams and routine and what is your opinion on it.

Thanks,

Steady

Scott S
Scott S
9 years ago

Question – I’ve been doing the diet for years. Now a lifestyle. Some ups and downs. How bad is it when you nimble mid-week on something you shouldn’t – a couple chips, cheese on hamburger and lettuce wrap? Does the whole Ketosis process fall apart?

Oola
Oola
9 years ago

With all due respect, and I do mean that, can you really believe that you can tell about the effectiveness of any approach by looking at it for four weeks? Much, much research has already shown us that people who go on diets end up heavier two years later. And people who restrict certain foods do lose up front, but don’t maintain the loss or the eating habit. And most of the weight loss is because they get tired of the same foods and eat less. Good short-term tactic. Bad one for three, five, ten years. Yes, yes, I know there are successes at this but they are the EXCEPTION! This no matter what plan they use. We know that no matter how a restricted a diet helped people lose weight, they are rarely still eating that way two years later. We also know that there is often a honeymoon during which people love the program and are convinced they will always live this way. The stats prove that wrong. There really are things that taste better than being thin feels, if you can judge by the majority experience.

I know speed sells. But real weight loss is finding a way to live with food for five YEARS or more. And not just for the minority. When there’s a dropout rate as there was here, which is typical, we’ve got to find another way.

Tim may be just the man to do it. But he may have to give up hacking i.e., shortcuts.. just for this one.

Alex O
Alex O
9 years ago

Just about to embark on The Occam Protocal challenge of gaining muscle. I am 6 foot 6 and 87kgs and want to get to 97kgs in ten weeks. My problem is that I play intense basketball one night per week on Monday night.

Q: When should I do my Work Out A and Work Out B to maximise gains and have maximum recovery time?

Many thanks

Mark Leeds
Mark Leeds
9 years ago

Consuming protein mix slowly:

I started using a talking clock app set to read the time every five minutes. I take a sip of protein mix (1 scoop with 16.9 oz water) every time the app speaks the time. I am trying every ten minutes today. Helps with hunger and possibly constipation.

allie
allie
9 years ago

has any body builders, figure, bikini competitors tried this? If so, how were the results?

Janet
Janet
8 years ago

I plan to eat just a little less than what I burn off and see if that gets me to where I want to be in my weight loss journey. You think I can join this study?

James
James
8 years ago

I wonder why nobody thought about comparing the different diets and finding out which diets really work.

milany
milany
8 years ago

wow great result.i used to drink herbal supplement

Joshua Cabell
Joshua Cabell
8 years ago

I have tried many diets over the years to biohack my IBD and get off pharmacotherapy. I have been successful using a modified Paleo diet, however when i eat clean, I lose too much weight. Interning this summer with the CCFA, I wrote a white paper explaining that gut micro biome research is leading the clinical dietary discussion towards personalization. This quantified diet effort is important for improving the evidence base of dietetics.

I am excited to learn more about this research effort. Given recent data demonstrating the high variability in the responses of different individuals to identical meals, I am very curious about your methodology, particularly regarding outcome metrics and internal controls. Thank you kindly!

http://www.cell.com/cell/pdf/S0092-8674(15)01481-6.pdf

Jack
Jack
8 years ago

I find your subject/headers frequently misleading – the body of this email did not give me any of the information that the subject suggested it would

Kelly
Kelly
8 years ago

How do I calculate calories, fat and protein on the slow carb diet?

weight loss
weight loss
7 years ago

I am regular reader, how are you everybody? This post posted

at this site is truly good.

Comteg
Comteg
7 years ago

Hello Tim,

I’m looking for a french 4 hours body version. Do you havé any option (pdf, ePub, paper)?

Best regard

G.

omri
omri
7 years ago

problem with low carb diet, is the taste. After 2 weeks of eating beans beans beans…i want to throw up from beans. PLUS, there aren’t many good recipes to make beans more tasty.

Low card diet would be THE diet, if it would be tasty.

for now, its no different from eats “greens” diet. or fruits diet or other not so tasty or too much of something diet.

ginatomaselli
ginatomaselli
6 years ago

It seems like the slow carb diet would be very difficult to do being vegan. Has anyone done it and/or do you have any tips?

Ali
Ali
6 years ago

On the slow carb diet, you drink red wine every night… Can I replace this with an occasional vodka soda? No sugar? I can’t drink wine due to the sulfites… Thanks in advance!

Corné
Corné
4 years ago

Hi Tim, I have read all the 4-hour books, and listen to your podcast regularly. With all this info things can get a bit overwhelming. I have one question I’d like your opinion on if you can find the time to answer or point me to a previous post where you might have answered it. I have recently done a basic carnivore/keto diet and lost about 3-4% bodyfat (currently around 25%) and about 7kg of weight from 95 down to 88kg from 11 January. Also lost a bit of muscle in the process. I’d like to be around 90kg but much more bulky and leaner maybe around 12% bodyfat. I’ve done Mark Ripetoe Starting Strength program on and off over three years. Squat/Benc press/Deadlift.
In your opinion can I use that as Occam’s protocol exercises split into three days per week, (push, pull,legs) bench press & triceps, deadlift & pulldowns, squat & calf raises?
And for diet do Cyclical Ketogenic Carnivore 6 days on 1 day off? Will this still produce significant fat loss while building mass, my goal is 12% bodyfat by Mid April 2020. My concern is Too high a protein intake would continually kick you out of Ketosis, and if I had to balance out with fat to maintain +-450g (17%) protein per day for muscle I’d need about 890g fat almost 8000 calories. Or will regular macros of 142g protein and 280g fat be sufficient?

Thanks Corné