Forever Fat Loss

Skip the latest diet crazes, ditch the mental aerobics, forget information overload and just practice the basics.

 Forever Fat Loss

The signature 8-week Fat Loss Coaching Program Helping Women 40+ Lose 5-15lbs. and Keep It Off For Good. 

    Join the waitlist now and be the first to know when doors open and get early action takers bonuses and discounts. 

    Live calls for FOREVER FAT LOSS- BUILD PLUS will be recorded if you can't make them. See below for more details.

    Skip the latest diet crazes, ditch the mental aerobics, forget information overload and just practice the basics.

    I'm looking to work with you in FFL if you fit at least 3 of the following criteria:

    • Have lost and regained the same weight over and over again
    • You lose weight, but feel like you're not getting any leaner or toned
    • You've sifted through all the programs, meal plans, and diets on your own, trying to find what works for you
    • You’re on a GLP-1 (or considering it) and know that locking in healthy habits is the real key to long-term success.
    • You know strength training is important, it's just always the first thing that goes when life gets busy
    • You've felt at times like your body has betrayed you by taking away your energy and slowing your metabolism down to a crawl
    • You've done all the things, maybe getting transient results, but nothing ever sticks and you wonder what exactly the problem is
    • You flounder and don't know what to do when the diet ends or stops working

    These ^^^ were some of the thoughts and feelings I had on my own fat loss journey.

    And so, I created a solution.

    Be the first to know when doors open and get early action takers bonuses and discounts.

    Two Levels of Access...Choose the BEST Option for You!


    Forever Fat Loss Build (FFLB) You've got the diet part nailed down, but you know how important strength training is to maintaining your weight, metabolic health and overall strength. With FFLB, you'll get access to an 8 week progressive style strength training program in the app, for just $179. Build strength. Build confidence. Build the habits that last.

    Forever Fat Loss Build Plus (FFLBP)
    Get everything you need to feel strong, supported, and consistent:

    • 8 weeks of progressive strength training in the app
    • 8 weeks of fat loss nutrition coaching with me
    • Weekly office hours for extra support
    • One-on-one communication when you need it

    All this for just $599—alongside a group of women with the same goals, working right alongside you.

    FOREVER FAT LOSS is the fat-loss coaching, support, and accountability system you need to get the results you deserve.

    This is the program that I wish I had when I was struggling with all of the above.

    What I've realized, after YEARS of trying to find what "works" for me, is that fat loss is actually pretty simple. All the diets and food rules I followed over the years made things more confusing and complicated.

    I was trying to be successful following what worked for OTHER people. What foods to cut out, what hours to eat during, etc.., instead of asking myself how I wanted my nutrition to look - long-term.

    FOREVER FAT LOSS is designed to take ALL the confusion out of the equation and teach you what ACTUALLY works and help you design a lifestyle around that. One you ENJOY. One that doesn't require giving up the foods you love or spending hours you don't have in the gym.

    Fat loss is SIMPLE. It's just not always EASY to implement consistently. But once you've learned what YOU need to lose fat based on the most up to date science, plus your personal preferences, schedules, and social life, the more empowered you'll be to follow through. It's a process for sure, but it's one that is worth it!

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    Be the first to know when doors open and get early action takers bonuses and discounts.

    2 options: Build (workouts only) or BUILD PLUS (workouts AND nutrition coaching)

    Listen to What Clients Have to Say!

    Listen to what Liz, a 41 year old mom of 3, said about her experience in the lastest round of FOREVER FAT LOSS

    Donna is 59 and newly retired. Here's what she says if you're on the fence for joining FOREVER FAT LOSS

    Gina is a busy mom of two. Here is what she had to say about her experience in FOREVER FAT LOSS

    What is FOREVER FAT LOSS (build plus option)

    FOREVER FAT LOSS is my signature eight-week online group coaching program designed exclusively for busy women over 40 who want to lose fat and keep it off.

    Inside this evidence-based program, you will learn everything you need to begin losing fat, working with your hormones, and navigating the mindset and lifestyle hurdles we all encounter.

    At the end of this eight-week group coaching experience, you will understand exactly what you need to do to continue losing weight, but more importantly, how to keep that weight off!

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

    Inside FOREVER FAT LOSS, 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 EIGHT LIVE COACHING SESSIONS WITH ME via zoom, 24/7 access to a private group of like-minded women, 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.

    Imagine if…

    • You could actually change the way your body looks and feels using a methodology 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?

    Be the first to know when doors open and get early action takers bonuses and discounts.

    Starting at just $179

    Two Levels of Access...Choose the BEST Option for You!

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    You're going to learn my signature "CARBS" methodology for sustainable fat loss

    Collection – The foundational step where we analyze personal data like how much you’re eating, exercising, sleeping, and how you are managing your stress levels. This information guides all our decisions in creating a plan that works for you and with you.

    Awareness – Here, we use the data collected and make tweaks or adjustments based on scientific best practices. This is where your daily habits, self-talk practices, and social calendar come into play. What obstacles do you face? What throws you “off course”? Bringing awareness to these things will help you to put a plan in place to navigate them.

    Repetition – In this step, we create systems that push the dial forward on your goals. We’ll ask questions like, what do we need to do on a daily, weekly, or monthly basis to create automation and repetition so we’re successful?

    Balance - Maintenance is all about living your life! This is where the magic happens, but there IS a balance that must be discovered. In this step, we clearly define what that balance looks like for you over the coming weeks and months.

    Sustainability – Here, we come up with a plan you can not only see yourself sustaining for the long haul but one that you feel confident knowing how to ADJUST when life happens…because we all know it will. This step is key to maintaining your results AND your sanity!

    Like I said, this is the exact framework I take ALL my high-touch one-on-one clients through, regardless of their goals, and it has resulted in hundreds of pounds lost and kept off!

    Be the first to know when doors open and get early action takers bonuses and discounts.

    Starting at just $179

    Client Transformations & Testimonials

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    I signed up for my second session of Forever Fat Loss after successfully losing 12 pounds last fall and maintaining it. I had a goal related to athletic performance to trim 2-3 pounds to weigh in while maintaining strength, but I also just wanted to have a body composition that I felt better about. In my second time around, I was able to practice and perfect more of my go-to eating habits, and having accountability, feedback, and community is super important for me. I saw a 4-5 pound scale weight loss this time around while bumping up my protein and strength training. I'm now in a great position to maintain muscle and work on both my athletic performance and just maintaining the movement and functional weight training that will keep me set up for success as I continue in perimenopause.

    For reference, I'm a mom of 2 elementary-age kids, work full time, am married, am very short (5'1), and have a lot of extracurricular activities, as we all do!

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    Holy moly Keri! I wanted to share some progress stats.

    In the FFL course alone, I started at 147 lbs, so I have lost 8 lbs since September 16. My measurements are honestly shocking to me, and I still have another 2 weeks to go.

    But by far, the biggest change has come through this program. I am truly stunned by how much of a difference protein and eating in a calorie deficit makes. I never understood how to calculate a calorie deficit, or how much protein to aim for.

    I just wanted to share those stats and insights! This season of life, with kids ages 9, 6, 3, and 18 months, has had me thinking it would be impossible to reach my body goals. So why even try. But my experience has been completely the opposite!! It is really so simple. Not easy, but simple. It has just meant a lot of trial and error to figure out how to fit workouts in, and accepting that the kids' sleep/nap schedules will always be in flux, but I can still find ways to get what I need.

    Thank you so much Keri. I really love your plain-and-simple advice and no-BS attitude. These programs have made all the difference for me. I can't believe how empowered and in control I now feel in my own weight and body comp!

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    Never thought I would get here. I felt so stuck. Thank you so much.

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    Be the first to know when doors open and get early action takers bonuses and discounts.

    Hey, I'm Keri

    My name is Keri Mantie and I help women develop a healthier mindset around 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 47 year old mom to 3 boys, CJ (8), and 15-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 FOREVER FAT LOSS – to cut through the BS taught in other weight loss programs so you can get the results you deserve without wasting time or money. This is honestly what I wish I had years ago when I was constantly "on" or "off" a diet.

    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, a certified Health Mindset Coach, Macro Nutrition Coach as well as Certified Menopause Specialist.

    I've been in the fitness industry my entire career (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 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.
    • Don’t eat after 7 pm.
    • 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.
    • Eat certain foods at certain times of the day.
    • Carb cycle

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

    If you’ve been struggling to get and maintain results, 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.

    Be the first to know when doors open and get early action takers bonuses and discounts.

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

    FOREVER FAT LOSS 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 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 know what to do, but give up when you're on your own.
    • You are open to trying new things, ready to commit to yourself, and are ready to ditch the ‘all or nothing’ mentality.

    Who is FOREVER FAT LOSS 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, or wants someone to do all the work for you in terms of planning and prepping, then likely this experience is not for you.

    I've said it before and I'll say it again. Fat loss really is SIMPLE. It's just not always easy to implement as consistently as we need to. THIS is where the work comes in. You're going to be asked to track, daily, in whatever way works for you. You're going to be required to make different choices than you're making now. You're going to have to be HONEST WITH YOURSELF (this was always really tough for me because I wanted to believe I was "doing everything right").

    There is no magic. It's work. It takes a LONG time (longer than 8 weeks)....

    But I promise you, once you really understand the science behind fat loss, you'll know with 100% certainty what it is that you need to do to get results. Then it's a matter of DOING it 🙂

    This is also not for women who are looking for a fully hands-on experience. 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 info@kerimantie.com

    Be the first to know when doors open and get early action takers bonuses and discounts.

    At the end of eight-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.
    • Realize that you can get great results, without starving yourself or giving up the things you love to do so.

    Here’s how we’ll get there together:

    • EIGHT evidence-based coaching sessions (recordings that you can access on your own time will be provided via our private portal). Week-1 content will be available on Saturday, September 20th and every Saturday thereafter. This will give you a few days to watch the recording before our weekly live office hours.
    • Each week of the program, beginning on Wednesday, September 18th at 12pm EST (and every Wed. after) I will host live "office hours" where I will do a quick recap of the week's focus and answer any individual questions/concerns you may have. You can email these in if you can't be on live and you will have access to the recording.
    • Exclusive access to a private members’ only Facebook Group for real-time coaching, continued learning, support, and encouragement. Ask me anything!
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    Be the first to know when doors open and get early action takers bonuses and discounts.

    What we'll cover week to week:

    WEEK 1:

    Collecting Data + Planning

    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. We set some very realistic expectations for our time together and put a plan in place for how we will do that.

    WEEK 2:

    Optimizing Results with Data Tracking

    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. We'll discuss the importance of tracking, why we want to track protein, fiber and calories and how to do so in a way that feels EASY!

    WEEK 3:

    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.

    WEEK 4:

    Mindset

    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.

    WEEK 5:

    Myths and Misconceptions + Minerals

    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.

    We're also going to dive into MINERALS! This is an area of nutrition that I recently embarked on and my mind is BLOWN by how important these are in terms of energy, ability to lose weight, thyroid health and more! I'm excited to share with you all that I've learned and teach you how to master your mineral intake through your diet!

    WEEK 6:

    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.

    WEEK 7:

    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.

    WEEK 8:

    Program wrap up + how to transition into maintenance successfully

    We'll take this week to wrap up any loose ends and talk about how to either transition into a maintenance phase and / or how to continue to navigate a fat loss phase, depending on your individual goals.

    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.

    IT'S NOT YOUR FAULT.

    We're told to diet, diet, diet - but then what? There's never an "exit" strategy or a plan for what happens next.

    And as you lose weight, your energy needs change. As you get older, your energy needs change. As you become more (or less active) your energy needs change.

    We're not taught this. We're just taught to follow "the plan" forever and ever and if we start to gain weight back - go back to what worked before.

    Unfortunately, it doesn't work that way.

    Inside FOREVER FAT LOSS I will teach you my signature methodology and help you IMPLEMENT what you learn right away.

    At the end of eight-weeks, you will know, with 100% certainty, how to lose fat sustainably regardless of your age and you will be on your way to ditching the ‘all or nothing’ mentality so you can unlock real results.

    There is a better way. I promise! And this is it. The mindset piece of this course alone is worth the investment.

    I know that you have what it takes, you wouldn’t have made it this far if you didn’t. I can not guarantee that you will lose "x" amount of weight in 8 weeks. But I will tell you that if you implement the methodology, strategies and tactics - consistently, show up (or watch the weekly modules and office hours) and ask questions - you WILL get results.

    FOREVER FAT LOSS is the key you need to step into effective, sustainable fat loss results for life.

    REAL WOMEN, REAL RESULTS!

    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 sugarcoat anything. She is honest and to the point, which, personally, is just the kick in the butt I needed.

    Feeling thankful, energized and strong. ️ ️

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    This was so awesome and you have helped me SO much. I am down almost a total of 10 pounds, which is remarkable given the fact that I haven't been moving as much due to work being crazy. This was a great reminder to prioritize the important things and not eat my way through stress, because the stress isn't going away! I've learned that how I react to it can certainly change and can definitely see big benefits when you make those changes. I feel completely confident with the all the work travel I have coming up and how to progress from here. Thank you for all of the support!

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    Start by placing Your Name and Email below. From there you will be taken to select BUILD or BUILD PLUS, and make your payment!

      We Start Monday, September 22, 2025!

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      Frequently Asked Questions