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Break Free From Chronic Dieting 

With Metabolic Testing, Personalised Nutrition & Exercise

Our 6 Week Metabolic Transformation Challenge, has been successfully tried and tested on 100’s of men and women in & around Birmingham

Next Challenge: March 2024. Limited Spots – book yours now!

Lose Stubborn Fat
Be Proud of Your Body
Know What To Eat

Struggling With Diets & Not Seeing
The Results You Want?

You don't feel comfortable in your own clothes

You don't want your picture taken or
posted online

You struggle to stick to aggressive calorie cutting diets

It's not you. It's probably your metabolism. Time for a change. 

What is Metabolism Testing and Who Is It For

You want to lose fat

You want to build muscle

You want to recomposition your body

You want a data-driven plan 

You want a plan backed by Science

Suitable for all ages 

Struggled to lose weight in the past

You want a sustainable lifestyle change

Jack Braniff, Owner of Box Nutrition 

A Personalised Plan Designed
For Your Metabolism 


Get clear on your body's needs and know exactly what to eat with a personalised nutrition plan. 


See a body you're proud of when you look in the mirror and watch your confidence soar.


Live life to the fullest knowing how to balance enjoyment and your nutrition goals. 

Scientifically-backed, metabolism-based nutrition strategies


Proven results with the latest metabolic testing technology 

Plans by Top Rated Author of Fuelling the Functional Athlete Jack Braniff, MSC

The 6 Week Metabolic Challenge

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The 6 Week Metabolic Challenge

The Metabolic Challenge is a 6-week weight loss programme that begins with a metabolism and body fat test. Over six weeks, you'll engage in receive continuous support via a dedicated app, and work closely with your own accountability coach.

  • RMR (Metabolism) Test

  • InBody Body Fat Test

  • Comprehensive Nutrition Audit

  • Tailored Nutrition Plan

  • Access to the Box App

  • Your personal accountability coach


Enter your details below for more information

Our 100% Guarantee

Not convinced? We're so sure of the effectiveness of our programme that if you follow it to the letter and don't see any weight loss, we'll give you your investment back into your account. You literally have nothing to lose.


What's The Cost?

If you were to purchase each component of this transformation program separately, you'd be looking at a total investment of over £500.


But here's the catch—we're offering you a deal you won't be able to resist.


Our exclusive Special for this Metabolic Challenge but just £199.


That's £33 per week, significantly less than what you'd pay for a single session with an average UK personal trainer.

For this price, you're not just getting workouts—you're getting a complete lifestyle upgrade. This includes advanced metabolic testing, tailored nutrition plans, access to exclusive group personal training sessions, and more. All with guaranteed results.

Our 100% Guarantee

Not convinced? We're so sure of the effectiveness of our programme that if you follow it to the letter and don't see results, we'll give you your investment back into your account. You literally have nothing to lose.

How It Works

in 3 simple steps...

Take a
15 minute
metabolism & body fat test
Follow the tailored plan we give you and attend the weekly meetups.
Get your confidence back, look and
feel great

Frequently Asked Questions

How long does the  metabolism test take?

15 minutes. It's a really simple test that you will take sitting down.

Where do I  have  to go to take the metabolism test?

We are based in Erdington, Birmingham. B24 9QR

Do I need to do anything to prepare for the test?

To ensure your metabolism test is accurate you need to make sure you don't eat anything, or drink coffee 4-5hrs prior to your test. You also can't do any vigorous exercise for 12hrs before your test.

I've tried every diet in the book , will it work for me?

We get it. After cycling through numerous diets without seeing the results you hoped for, it’s not wonder you’re frustrated. However, the key issue often lies not in your commitment but in the generic nature of these plans. Our approach is fundamentally different. We dive deep into your unique metabolic profile, crafting a nutrition plan that's as individual as you are. This isn't about following trends; it's about understanding your body's specific needs and how it processes food, ensuring the plan we develop is the one that finally makes a difference for you.

What if I have special dietary requirements?

We tailor make all of our nutrition plans based on your dietary intolerances and/or requirements. It's suitable for all diet types.

I'm not great at cooking, are the meals complicated?

No. We keep our approach to nutrition simple and data based. By using your metabolic rate to design a plan that will work with your body, we don't need to complicate it.

I'm so busy what if I don't have time to meal prep

No worries. During your nutrition audit we will discuss your lifestyle and any commitments you have so that we can ensure you stay on track even with the hustle and bustle of daily life.

Do I need to exercise

No, exercise is not a mandatory component of The Metabolic Challenge. However, we strongly encourage incorporating daily activity into your routine to complement the nutritional aspects of the programme and support overall health and well-being. For those looking for structured exercise support, we offer a range of classes designed to suit various fitness levels and preferences, helping you find the perfect fit for your lifestyle and goals.

What Your Get

We use a 3 Step System

1. Metabolic Testing

Comprehensive In-House Assessment: Begin your transformation journey with our detailed metabolic analysis.


This includes:

  • Body Composition Analysis (InBody): Get a clear picture of your body's composition to tailor your fitness plan.

  • Resting Metabolic Rate (RMR) Test: Understand how your body burns calories at rest, crucial for effective weight management.

  • Active Calorie Burn/VO2Max Test: See how your body utilises calories during activity, allowing for optimised workout plans.


These assessments provide a solid foundation for your personalised fat loss or performance strategy, ensuring that every aspect of your programme is fine-tuned to your body’s unique needs.

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The 3-Hour Workout Week

Transform how you look and feel with our optional exercise workouts. Our 3 Hour Workout is an efficient approach is designed to ensure your clothes fit better and you look amazing, all while fitting seamlessly into your busy schedule. Exercise is entirely optional, allowing you to tailor your journey to your personal preferences and lifestyle

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The Mobile App & Accountability Coaching

VIP Access to the BOX Mobile App:

  • Say goodbye to endless Google searches. Our app provides you with the essential knowledge and tools you need, right at your fingertips, for a streamlined learning experience.

Next-Level 1:1 Accountability System:

  • Even on days when motivation is low, our accountability system ensures you stay on track. Personalised support means you're never alone in your fitness journey.


Hastingwood Business Park, Erdington, B24 9QR / email. Tel. 07860945336

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Jack Braniff

  • Masters degree in exercise nutrition

  • Personal Trainer for over 15 years

  • VDOT Running Coach

  • CHP Hybrid Master Trainer

  • Over 1000 metabolic tests completed

  • Helped 100's of men and women with both performance and fat loss transformations

Why Work With Us?

My name is Jack Braniff  and I'm the founder of Box Nutrition and Performance.

The problem with nutrition and fat loss, is that there's almost too much information out there, which can make it incredibly difficult to know what to do! Having my Masters in exercise nutrition, I am able to breakdown the confusing science of nutrition into a clear action plan that gets results. I believe that true weight loss comes from making lifelong changes, not just from following a strict diet for a few weeks. 

I've been in the industry for over 10 years and helped 100's of men and women get results, as well completing over 1000 metabolic tests. I follow long term approach with my clients, helping them achieve a positive relationship with food and their bodies without sugar coating the facts of how to lose weight.

How Exactly Does A Metabolism Test Work

Metabolic is a fat loss programme specifically for those who:

  • Want to look and feel their best and get in awesome shape in 2024

  • Want to finally break the Yo Yo diet cycle

  • Want to eat more than 1200 calories without gaining weight

  • Want a plan that is unique to them and their individual needs

  • Are after more guidance with your training and nutrition

  • Want to improve your sleep and feel more energised

  • Don't want cut out all carbs

  • Not interested in cleanses or quick fixes

  • Want a sustainable diet that will lead to lasting change

Real People - Real Results

Who is it for?
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