Science Backed Products
Thoroughly researched and scientifically sound products to help hit your goals.
Coaching programs
Explainer microcopy ipsum lorem. Do these entirely on your own!
Other science-backed products
Explainer microcopy ipsum lorem. Do these entirely on your own!
Other science-backed products
Explainer microcopy ipsum lorem. Do these entirely on your own!

Give us 30 days,
and we’ll help you
transform your body…

Give us 30 days,
and we’ll help you transform your body…

… and get the habits that will change your life even if you lack self-control and discipline.
Submissions are closed

See results in 30 days, and develop the habits to continue transforming afterwards

Challenge Members on average lose 5lbs of fat and gain 1.5lbs of muscle in their first 30 days.
  • Ken's transformation

  • Tahnee's transformation

  • Jeffrey's transformation

  • Archie's transformation

The 30-Day challenge starts <date>

The 30-Day challenge starts September 18th

This challenge only happens a few times a year. Join before September 18th to lock in your spot for a life changing 30 day transformation.

Are you ready?

To completely transform your life with thousands of others.
Feel like you finally have certainty over your eating. Meals at restaurants with friends or family get-togethers won’t trip you up.
Stop skipping workouts because you have no motivation to go to the gym.
Know with certainty that if you follow the program, you will get results you can see.
Make health and fitness the easiest, most enjoyable parts of your life.
Discover the fit, healthy person you always wanted to be (but didn’t know you ever could!)
The 30-Day BWS Challenge makes getting fit and eating well manageable and easy.


I’m sure by now you can see the life-changing value that our 30-Day Challenge will give you.
Not only will your $30 investment include everything I‘ve talked about: the videos, the workouts, the recipes, the checklists and more. It also includes a $30 Amazon gift card you can use to get these items that will be essential to your 30 Day transformation:

Food scale

Weight scale

Measuring tape

During the challenge we’re going to show you why these 3 tools are essential to finally get the body and lifestyle upgrade you’ve always wanted. They’re easy to use, and take all the overwhelm and uncertainty out of getting fit!
And if you have these 3 essential tools already? You can use your credit for something else on our website.



A cash prize of $1000

2 Tubs of BWS Protein Powder


Want a chance to win these prizes?... Of course you do! We’ll be running contests that give you the opportunity to win big. But don’t worry… the prizes aren’t for meeting unrealistic goals like getting a 6-pack in 30 days. There’ll be several categories so that everyone has a chance to win. Once you sign up, we’ll share all the details inside the challenge!

If you want to unlock the secret to:

Lose fat every week
Improve muscle definition
Maintain your results for life
… then keep reading to see how the BWS system can improve your physique, and position you for a lifetime of success. In only a month!

Kye V.

Does this sound familiar?

“I was so excited to start. I went to the gym every day, and I was watching every bite I ate. It was great at first, but after a while it was hard to maintain motivation. So I missed a workout, then another… And then I just stopped.”

We hear this kind of thing from new clients all the time.

You’ve tried other programs or routines… made a little progress… lost a few pounds… but then something gets in the way. You get busy at work. You go on vacation. Your family responsibilities make it impossible to stay on track. And sometimes You lose your motivation because the results just don’t come fast enough…

The good news is that we know exactly how to avoid the pitfalls that cause so many people to lose motivation and give up.

It’s a system we’ve developed and refined over the past 3 years, and it’s helped tens of thousands of people just like you finally lose the fat and get fit.
Not only are we going to share our science-based system with you, we’re also going to give you the very best start you could hope for. A start that will set you up for a lifetime of success without relying on willpower.

It's not about what you have to do, it's about who you have to become.

To lose weight, burn fat, and build muscle - you don’t just do something. You must become a new person. The question isn’t so much about what workout to follow or what nutritional plan to subscribe to. It’s about changing your identity so your new behaviors automatically take you there.

the 30-Day Built With Science Challenge

Hi! I’m Jeremy Ethier,
founder of Built With Science.

My team and I created the 30-Day Challenge to help you kickstart your journey to better health and fitness.
We’ve designed the challenge to eliminate all of the common reasons people struggle to eat better, lose fat and get fit.
It comes from our proven, evidence-based and wildly successful training programs - programs that have helped over 100,000 people and counting!

The Built With Science system is exactly how it sounds…

Succeed with consistently eating nutritious, filling meals (you won’t be stuck eating bland, steamed kale and chicken breasts day after day)
Succeed with getting to the gym and working out (and enjoying every minute of it!)
Succeed with forming new, healthy habits that will last a lifetime (so you’re not relying on willpower)
Succeed with finally losing fat and gaining muscle - you’ll love how much better your clothes will fit!
And succeed with looking and feeling like a whole new person!

Whether it’s your first time starting a fitness program, or whether you’ve tried before but haven’t found success.

Even if it feels impossible right now. In just 30 days you’ll feel less resistance in your life. And finally become the healthier and fitter version of yourself that you’ve always wanted to be…
A life-changing
30 days
If you’ve always wanted to make a change, but didn’t know where to start. This is the perfect first step for you… and it will set you up for success for a lifetime.
Strict meal plans don’t work. That’s why we’ll show you how to eat well, even at social events or at restaurants. And still get the results you want!
your Fitness
It’s not about working harder, it’s about working smarter. We’ll show you the exact exercises you need to do (and how to do them) to get the physique of your dreams.
Support & Encouragement
You’ll get all the tools, support and encouragement you need to make this experience enjoyable, motivating and fun.

This program is perfect for you if:

You don’t know where to start with getting fit, losing fat and finding motivation or discipline
You want to understand why you may have struggled in the past, so it never happens again
You want health and fitness to be a natural and easy part of your life
You want it to be fun (not a chore!)
You want to look and feel better
You’ve tried other programs or fitness regimes but they were difficult to maintain or just didn’t work for you… with us it’s ok if you can’t be 100% consistent

Why are we including all of this at
such a low price? Because I want you to succeed!
I don’t want anything standing in your way to finally get the results you deserve to get.

Why are we including all of this at
such a low price? Because I want you to succeed!
I don’t want anything standing in your way to finally get the results you deserve to get.

Every week will get you closer
to your goals


You can’t improve what you don’t measure. This first week you’ll determine your baseline data and establish the fundamentals that will propel you to your goals.

Week 2 - Driving Results

This week is all about driving results. You’ll discover the best approach for your body and goals. And you’ll pick up some essential tips and tricks to advance your fitness and nutrition know-how.

Week 3 - Consistency

Week 3 is where we’ll focus on consistency so you can make better fitness and nutrition a natural part of your life. We’ll also show you how to dial in and improve your results.


You’ll continue to see changes and improvements… in your physique and in how you feel. This is also the week to lock in consistency and create the strongest foundation possible so you can keep improving.

Here’s what you can experience
with Built With Science

  • Mason's transformation

  • Tahee's transformation

  • Dylan's transformation

When you join the challenge, you get all of this:

BONUS #1 ($29 VALUE)

Daily 10-minute videos

These videos are where the magic happens. You’re going to open up a whole new world of understanding how science-based workouts and nutrition will change your life. You’ll see how to lose fat, get stronger, make new habits that stick… and finally get the long-term results you’ve been hoping for.
BONUS #2 ($29 VALUE)


that cover breakfast, lunch, dinners, snacks and desserts. Easy to prepare and include vegetarian, vegan-friendly options.
BONUS #3 ($49 VALUE)


See what Jeremy eats in a day and why. (You may be surprised by what you see.)
BONUS #4 ($29 VALUE)

Fat loss food swaps

that make eating enjoyable and healthy. Really! We don’t want to eat bland food either.
BONUS #5 ($129 VALUE)

The 30-Day Challenge Smart Tracker

It helps you track everything from your weight, your measurements, your calories, your macros, your steps and more… so you can be sure you’re getting the results you want (This tracker will blow your mind! It takes out aaallll of the guesswork and makes things easy.)
BONUS #6 ($49 VALUE)


This is calculated in the Challenge Smart Tracker. Your score keeps you on track so you know EXACTLY how your specific effort will result in fat loss and strength building. (Tip: You can get great results without having to be 100% consistent!)
BONUS #7 ($69 VALUE)

Daily calendar

The worst part about a new workout and nutrition plan is not knowing what to do next. We’ve eliminated this flaw with our daily calendar so you always feel in control.
BONUS #8 ($99 VALUE)

3 workouts per week

that will get you reliable results you can count on (they will work if you follow the plan!)
BONUS #9 ($29 VALUE)


that coaches you on form. Did you know that doing exercises incorrectly can not only cause injuries, but can prevent you from getting the results you work so hard for?
BONUS #10 ($99 VALUE)


that keep you progressing. You’ll get a simple checklist that will make hitting your goals easy.
BONUS #11 ($29 VALUE)

Behavior hacks

that will help you make the lasting change you want to see. You can finally rid yourself of feeling no motivation!
BONUS #12 ($69 VALUE)


Join a group of like-minded individuals who want to reach their goals too! You’ll all be in the challenge together, cheering each other on!
BONUS #13 ($29 VALUE)


Have a nagging injury or equipment limitation? We have 3 exercise alternatives ranked for every single exercise in your program.
TODAY: $10

Sign up now! You only have until <date>
to register - and to get your 3 essential tools shipped to your address in time.

Sign up now! You only have until September 18th
to register - and to get your 3 essential tools shipped to your address in time.

We’re not sure if or when we’ll open this challenge up again. So be sure to claim your spot before . After this date, registration will be closed. If you’re ready to finally get results, I recommend you sign up now. The 30-day challenge is the perfect first step that will make it so much easier than trying to do it on your own. We’ll be with you every day, guiding you to success! Don’t miss this opportunity.


What kind of results can I realistically get in 30 days?

Results will vary from person to person, and depends on your starting fitness level and body weight. But here’s some general guidelines about what you can expect:
An increase in your strength
A noticeable improvement in muscle definition
A reduction of up to 1 inch off your waist size
Lose up to 5 pounds of fat (the heavier you are, the more you're likely to lose)
An increase of 1 to 2 pounds of muscle
A noticeable increase in energy
An improvement in posture
Less bloating
Less achy and stiff, better mobility

Using a food scale sounds like a lot of work. Does your program make eating complicated?

Absolutely not. Our aim is to make eating enjoyable and satisfying. There’s no complicated food prep involved, and you don’t need to use it for every meal. The food scale will actually make eating easier - you won’t be left guessing or wondering if what you’re eating will help you lose fat and get healthy. Everything we show you is backed by science, reliable and safe.

I have a family event that takes place during the challenge. Will I be stuck eating a salad and drinking water while everyone else enjoys their meal and drinks?

We’ve designed this program to work with your life. You can still have a drink and enjoy a meal out. We’ll show you how to make room in your life for these situations, so you never feel restricted or left out

Do I need special equipment?

We’ve designed this program to be as accessible as possible. If you have access to a gym, great, you have more than enough equipment. If you only have access to barbells or dumbbells, we’ll show you how to make that work just as effective. Even if you don’t have access to anything, or struggle from injury limitations holding you back, we’ll provide you with suitable alternatives to make it work!

I’ve never had an exercise routine before. Will this challenge be too advanced for me?

Definitely not. This challenge is great for people who have little to no experience with working out (and even those with more experience). We make things simple and uncomplicated. We’re going to show you everything you need to know to get started, so you never feel overwhelmed.

I’ve tried plenty of programs before. I’ve just never been able to make them last. How will this be different?

This challenge will help you overcome the common obstacles that prevent so many people from sticking with their exercise and nutrition. We help you understand the science behind the exercises and nutrition we recommend. This understanding is part of what will help you make lasting change. It will also teach you a new approach that will accelerate your results and help you keep them for life.

I don't live in the US or Canada, can I still participate?

Yes! The program will be the same no matter where you're located.