Finally, lose fat and keep it off once and for all.  

Discover a proven, evidence based process to sustainable fat loss.



The No-BS approach to sustainable fat loss for busy women over 40.

October 4th - November 8th

Did you know that most women struggle to lose weight because Diet Culture is a money-hungry machine that thrives on failure, not success?

Learn the fat loss secrets Diet Culture doesn't want you to know inside my signature LIVE fat loss group coaching program designed exclusively for women over 40.

Finally, lose fat and keep it off once and for all.  

Discover a proven, evidence based process to sustainable fat loss.




October 4th - November 8th

The No-BS approach to sustainable fat loss for women over 40.


that most women struggle to lose weight because Diet Culture is a money-hungry machine that thrives on failure, not success?

Learn the fat loss secrets Diet Culture doesn't want you to know inside my signature LIVE fat loss group coaching program designed exclusively for women over 40.

My name is Rita, I am a 54 yr old mom of 3. I went back to a full time office job in 2019 when my youngest went to college.  I am also a personal trainer and have worked at gyms my whole life.  I have also never struggled with weight until this year. 

Between working more, trying to balance home, taking care of my mom and the “change”, my workouts and diet suffered.  I lost my mojo to workout and eat healthy. I totally went off the rails 2020 when my Mom went into a nursing home and then died of COVID.  It was the the hardest thing I have ever gone through.

Despite “knowing what to do” - and helping others - I couldn’t help myself.  I spiraled down and couldn’t find my way. I realized I needed someone to help ME.

I have been following Keri through a mutual friend and have been watching her posts and laughing at CJ’a garbage truck obsession.  When she offered a nutrition Masterclass - I knew it was time to re-commit to myself.  I signed up!

I lost 10 pounds, 2 inches on my hips, 2 inches on my thighs and 2 inches on my waist.  I still have work to do, but seeing results and using Keri’s approach really works. She doesn’t sugar coat anything. She is honest and to the point, which, personally, is just the kick in the butt I needed.

Feeling thankful, energized and strong. ️ ️


I bet you are tired of…

  • Losing and regaining the same exact weight over and over again.
  • Sifting through all the BS programs, meal plans, and fad diets on your own, trying to find what works for you.
  • Feeling like your body has betrayed you by taking away your energy and slowing your metabolism down to a crawl.
  • Doing all the things, seeing none of the results, and wondering what exactly the problem is.


I was too. So, I created a solution!


Fat Loss Fundamentals LIVE is the fat-loss coaching, support, and accountability system you need to get the results you deserve, once and for all!

October 4th - November 8th


What is Fat Loss Fundamentals LIVE?

Fat Loss Fundamentals LIVE is my signature 6-week LIVE fat loss group coaching program designed exclusively for busy women over 40 who have been doing all the things but are seeing none of the results. Inside this evidence-based program, you will learn everything you need to begin losing fat, tracking your progress, working with your hormones, and navigating the mindset and lifestyle hurdles we all encounter, so you can finally unlock the health results that the BS diets have kept just out of your reach. At the end of this six-week LIVE group coaching experience, you will know the fundamentals of building a sustainable and realistic fat loss plan that works for you!

If you have been searching for high-access coaching in a dynamic group environment, this is it!

Inside Fat Loss Fundamentals LIVE, you will get some of the same exact high-access systems and support featured in my 1:1 coaching packages for a fraction of the price. Plus, with SIX LIVE COACHING SESSIONS WITH ME, your own private daily accountability check-in portal, 24/7 access to a private Facebook group of like-minded women, real-time coaching, accountability, and expert-level support you will not be left behind struggling (yet again!) to remain accountable to finally finishing something you’ve started.

 We’re ALL in this together and I will not let you down. No way, no how!

Imagine if…

  • You could actually change the way your body looks and feels using a program that fits into your lifestyle.
  • You had an expert-developed program that can help you sort through all the BS meal plans and fad diets while providing a gimmick-free solution.
  • You possessed a better understanding of how hormones work at your age and had a plan that worked with them, not against.
  • You got the results you deserve and felt better than ever before.

 How would your life change?

Hey, I'm Keri! 

My name is Keri Mantie and I help women develop a healthy relationship with food, exercise efficiently, and create real-life solutions to feeling their best, both inside and out so that they can stop the “all or nothing” dieting mindset, reach their goals, and maintain those results in a healthy and balanced way.

I'm a 43 year old mom to 3 boys, CJ (3), and 10-year-old twins, Michael and Drew. And just like the hundreds of clients I’ve worked with over the past 20+ years, it is my mission to balance nutrition, mindset, fitness, and fun. That’s why I created the Fat Loss Fundamentals Masterclass – to blast through the BS taught in other weight loss programs so you can get the results you deserve without wasting time or money.

I have a Master’s degree in Applied Exercise Science and a Bachelor’s degree in Exercise Physiology. I hold my Level 1 Kettlebell and Bodyweight Certifications through StrongFirst. I am a Certified Strength and Conditioning Specialist (CSCS), a Metabolic Effect Nutrition Consultant, specializing in hormonal fat loss for women and a newly certified Health Mindset Coach.

I've been in the fitness industry since 1997 and have worked with thousands of clients, both in-person and online, helping them to achieve their health and fitness goals.


I get it! You’ve ‘tried it all before’.

It’s frustrating, time-consuming, and expensive.

 Diet culture teaches all kinds of BS nonsense and more than likely you’ve likely fallen for it at least once.

 Heard any of these?

  •  Eat 1,200 calories a day
  • Exercise for 60 minutes a day, 5 days a week minimum.
  • Don’t eat after 7pm.
  • Cut out all carbohydrates.
  • Only eat between 12 and 8.
  • Eat every 3 hours to "keep your metabolism firing".
  • Eat as soon as you wake up.

 Add your favorite ‘popular diet advice’ here because trust me, I’ve heard them all before.

 If you’ve been struggling to get and maintain results using fit-fluencer inspired diets or workout plans you read about on the internet, you’re not the only one. We’ve all gotten caught up in the sparkly promise of ‘lose 10 pounds in 10 days’…Myself included!

 But now I know better. And I want the same for you.

Fat Loss Fundamentals LIVE is different from anything you’ve EVER tried before. Here’s why:

Inside Fat Loss Fundamentals LIVE, you will uncover the TRUTH about effective, sustainable fat loss over 40 by learning how to work WITH your hormones, not against them. After this program, there will be no doubt in your mind as to what YOU need to do to get the results you’re looking for.

Get SIX LIVE COACHING SESSIONS WITH ME, with plenty of time for Q&A. A private daily accountability and check-in portal where you can store all your food, weight, measurement, fitness, and other stats so I can personally monitor your progress and make practical recommendations. Receive engaging “homework” to help you review and create realistic goals, all while learning how to accurately measure with metrics that matter! And of course, you’ll receive immediate and exclusive 24/7 access to a members’ only Facebook Group for continued learning and real-time coaching support for additional questions, accountability, and encouragement.

It’s time to trash all the fit-fluencer BS nonsense you’ve been following so you can start focusing on the things that ACTUALLY MATTER for effective, sustained fat loss after 40.


"Great course! I have learned a lot about sustainable fat loss in the long run. It normalized my expectations and taught me that it is normal for fat loss to take time. Also, I know what to do and have found a comfortable way to live while also reaching my goals. Thanks, Keri!"

"The changes aren't drastic, but they're happening without restricting myself from my favorite foods or taking 6 group exercise classes a week. I finally feel hopeful and I know this is just the beginning."


At the end of six-weeks, you can expect to:

  • Feel more confident and less confused about what you should do to lose fat.
  • Feel more comfortable in your clothes (and outside of them too!).
  • Experience fewer food cravings and enjoy more stable energy throughout the day.
  • Have a better understanding of the power you have over your hormones via the food you eat and the movement you choose.
  • See the results you’ve been searching for that countless fad diets have kept just out of your reach. 

Here’s how we’ll get there together:

  • Six evidence-based LIVE Coaching Sessions (via ZOOM) with plenty of time for Q&A, plus an all-access pass to our private portal to download and re-watch all training sessions during the program + 2 weeks afterwards.
  • A private daily accountability check-in portal for you to enter weight, food, exercise, and more so I can personally monitor your biofeedback and results.
  • Engaging worksheets and valuable ‘homework’ to help you review concepts and create your very own realistic and sustainable fat loss program.
  • Exclusive access to a private members’ only Facebook Group for real-time coaching, continued learning, support, and encouragement.

Here’s a sneak peek of everything you’re going to learn:


Optimizing Results with Data Tracking

In order to get great results, you have to know two things 1) where you are, 2) where you want to go. We’ll cover exactly what and how to gather data correctly to accurately track your progress. We’ll explore various tracking methods so you can choose the one that works best for you. You will learn how to calculate your precise nutrition and fitness needs based on your own unique activity level, past dieting history, personal preferences, schedule, and more. This is the foundation for the remainder of the program.


Hormonal Fat Loss & Energy Balance

We will cover what hormonal fat loss means, the importance of regulating your blood sugar, the difference between losing weight and losing fat (it’s a big one!), and what to eat to keep your hormones balanced and in optimal fat-burning mode.

We’ll also review how to start tracking calories, protein and fiber so you can gain important insight and be able to immediately identify the changes that need to be made and when so you can see optimal results month after month, year after year.



Did you know that our mindset is one of the things that hold us back the most from getting the results we deserve? If you are someone who struggles with consistency or the ‘all-or-nothing’ mentality, let me tell you, it’s not a ‘food’ or ‘exercise’ issue. It’s a mindset issue. And unless you can immediately identify your own limiting beliefs, you’ll continue to struggle.

In this module, I put my Health Mindset Coaching Certification to use so that you can put everything you know into practice. This was my Achilles heel for a WHILE, something I personally struggled with myself for many years and something nearly every one of my clients has struggled with at some point in their journey. It’s not about the ‘not knowing’, it’s about the doing, and getting through the mental blocks is the first step to true freedom…and we’ll break it all down in this module.


Myths and Misconceptions about Fat Loss

This week we’ll tackle ALLLLL the myths and misconceptions surrounding fat loss and of course address some of the most popular frequently asked questions. From aging metabolism to the best exercises for fat loss, how to stay motivated to how your weekly wine impacts your results, we’ll cover it all. You’ll definitely want to bring your pen and paper to this one because we’re going to break all the ‘rules’ and learn what actually matters for your best results.


Monitoring Progress, Breaking Plateaus, and Making Adjustments

You’ll learn exactly what you should be doing on a daily, weekly, monthly, and yearly basis to monitor your own progress and break through roadblocks and plateaus. You’ll have an arsenal of tools and knowledge at your disposal to jumpstart stalled progress, maintain healthy, happy hormones, and rev up your metabolism at any age.


Setting Yourself up for Success

You are not meant to be living in a fat loss, caloric deficit, diet phase forever. You’ve got a life to live and enjoy and part of that is having freedom around your nutrition and fitness. This module has got you covered. Inside you’ll learn everything you need to know to craft your very own long-term nutrition and fitness protocol. Discover the right way to cycle through the different diet phases so you can keep the results coming while maintaining happy and healthy hormones.

With each of these LIVE Coaching Sessions, it is my goal to give you the science and evidence behind effective, sustained fat loss so you can avoid making the same mistakes I made. I know these sessions will completely change your perspective on fat loss and give you the fundamentals you need to make your goals a reality. It’s time to stop spinning your wheels, stop second-guessing, and stop starting over. Fat Loss Fundamentals LIVE has everything you need to change your life for life!


My signature LIVE fat loss group coaching program for women over 40 uses evidence-based strategies and systems to get you optimal results. While these revolutionary protocols can work for anyone, Fat Loss Fundamentals LIVE is not for everyone.

Fat Loss Fundamentals is for you if…

  • You’re feeling out of control right now with your nutrition and are looking forward to a little structure.
  • You are a busy woman over 40, looking to take the guesswork and stress out of losing fat.
  • You know you feel better when you’re following a program that works with you, not against you.
  • You want accountability and education because knowing WHY you’re doing something is just as important as actually doing it.
  • You are sick and tired of overly complicated, overly priced programs that leave you hungry and frustrated, and still fail to deliver results.
  • You want to learn how nutrition and hormones affect your body so that you can have more energy all while feeling lighter, tighter, and less bloated.
  • You are open to trying new things, ready to commit to yourself, and are ready to ditch the ‘all or nothing’ mentality.

Who is Fat Loss Fundamentals NOT for?

If you’re a woman who wants a set meal plan, to be told to ‘eat this not that’, refuses to have an open mind, will not make an effort towards learning to dismantle years of diet culture brainwashing, or wants to simply follow the exact nutrition plan that I’m using, then likely this experience is not for you.

This is also not for women who are looking for a fully hands-on experience with custom ‘done for you’ macros, personalized workouts, or 24/7 text messaging.  If you’re looking for a 1:1, hands-on coaching experience, or have any unique health concerns that require highly specialized attention, then please reach out via email to

  • Balance your energy and hormones for effective fat loss.
  • Create strategies for tracking your food intake with or without using macros while effectively monitoring progress.
  • Get the precise mindset and lifestyle changes needed to create long-lasting change.
  • Navigate social situations and make adjustments so you can live the lifestyle you love and get results too.
  • Enjoy high-access expert coaching in a dynamic group environment.

And so much more!

What’s the investment, Keri?

Get an exclusive invitation to all SIX LIVE COACHING SESSIONS WITH ME, 24/7 access to live training replays and immediate downloads, plus membership in the members-only Facebook education and encouragement community throughout the entire course. You will also have the option to purchase a strength training program once enrolled!

All for around $5 per day! That's less than my Starbucks coffee!

Stop wasting money on these BS fad diets, influencer-promoted supplements, and special ‘miracle’ foods. Fat Loss Fundamentals LIVE will teach you everything you need to create a nutrition and fitness program that works with you so you can lose fat effectively and sustainably, for life!

The methods outlined in Fat Loss Fundamentals LIVE are the exact ones I use with my (high-paying) 1:1 clients to help them lose weight (keep it off) and nail down essential skills and behaviors for sustainable success.

These systems work.

The Methods outlined in Fat Loss Fundamentals are the exact ones I use with my 1:1 clients to help them lose AND KEEP OFF an average of 10-15 lbs over the course of 12 weeks.

Tamar, 51

"I think all of the mindset changes I got from the program are actually more beneficial to me than just some weight loss.  I am very happy that I participated in this program and know I will continue on with what I have been doing.

Thanks Keri!"

Kathy, 48

I feel so much better. I feel more in control and have SO much more time since I'm not spending hours doing cardio!

Laura, early 40's

I needed to find something that would work for my body now that I'm in my early 40's, working full-time and momming a 3 and 2 year old. Keri's program is doable and realistic if you're a busy woman!

Nancy, 41

I have lost 12lbs in 12 weeks. Maybe considered a slow roll, but that weight is not coming back. I'm continually finding ways to improve my eating and improve my exercise habits. My mindset is changing, and I've completely changed the way I view food and exercise. Put your money where your mouth is. If you invest in Keri, she'll invest in you.

Stephanie, early 50s

I am a mom of 2 teenage boys and I work full-time.

I've tried all the fad diets and none of them worked long-term.

Not only did I lose weight, I learned I can still eat what I want!

Keri helped me realize what I needed to change, and what needed to be implemented to be successful and consistent.

Michelle, 51

This was the first time that I really learned why suggestions were being made to cut back or add certain things to my diet.  It made sense to me which made making healthy choices so much easier. Keri's videos were my favorite part, I have listened to then multiple times.  They were interesting, motivational and educational.

Hey! One last thing…

I know you’re thinking, “I’ve been here before what if it still doesn’t work?” Let me tell you this, it didn’t work before because it was never designed to work in the first place. 


Diet Culture has been failing you for years and it’s time to break-up with it for good.

Inside Fat Loss Fundamentals LIVE we will toss out the BS and focus on real strategies that actually work for you. You will feel more energized and even more motivated because you’re doing what your body needs, not what diet culture dictates. At the end of six-weeks, you will know, with 100% certainty, how to lose fat sustainably regardless of your age and you will have completely ditched the ‘all or nothing’ mentality so you can unlock real results.

There is a better way. I promise! And this is it.

I’m really excited for you to experience something like never before. I know that you have what it takes, you wouldn’t have made it this far if you didn’t.

Fat Loss Fundamentals LIVE is the key you need to step into effective, sustainable fat loss results for life.

Let’s open that door together. Register today!


What happens after I pay?

It’s simple! Once your payment is received you will get an email immediately confirming your registration. Be on the lookout for a follow-up email within the next day or two with all the details for accessing the LIVE Coaching Sessions and the unique link to the members-only Facebook Group. If you register but do not receive your confirmation email within 24-hours, please reach out to

When do we begin?

Monday, October 4th at 12pm via ZOOM.

What if I can’t make the LIVE Coaching Sessions?

I get it, life happens! While I encourage you to make it live since each session will have ample time for valuable Q&A, every LIVE Coaching Session will be recorded and made available within 24-hours. If you’re unable to make it live or if you want to re-watch any of the sessions, you definitely can! If you cannot make the live calls, you will have the option to email in any questions that come up, or you can post them to the FACEBOOK page.

Can I invite a friend to join?

Of course! In fact, having a friend join you can make the experience even more fun. You’ll meet a lot of incredible women inside our members-only Facebook group, but setting goals and achieving results with your BFF by your side is so much fun! Simply share this link with them so they can join in on the results!

Can you guarantee I’ll lose fat? If I don’t, can I get a refund?

As with all health-based programs, there are no guarantees, but the systems you’ll learn inside Fat Loss Fundamentals are the exact same ones I used to get and maintain my results and that I’ve used to coach hundreds of 1:1 clients to long-term success over the years. If you’re willing to be honest with yourself and put in the work, you will likely see similar results! Due to the digital nature of the program, there are no refunds.

Do I have to have FACEBOOK?

No! The closed FB page is an added bonus, but I will be sure to touch on all questions and comments that may come up on there on our weekly calls.

If I don't have FACEBOOK can I email you my questions?

You definitely can, however because this is a group format, I will be answering all questions on our weekly calls.

Will I receive custom macros or workouts from Keri?

The information inside each module is designed to help you create your own nutrition program using evidence-based instruction. If you want a done-for-you experience or higher-access coaching, email to learn about my 1:1 coaching options. You will have access to a 6 week fitness program to follow that is completely optional!

I'm not in my 40's (yet) will this still benefit me?

Yes, absolutely! I think it would be beneficial to know how your hormones tend to shift as you get older and prepare yourself for things that you may need to consider!

I'm in!