Why I Do This Work
The short answer: I realized that everything I was learning about aging didn't matter if people did not know about it.
Who I Am
I'm a researcher. I spend a lot of time in labs, analyzing data, running clinical trials. I've been doing this for over 25 years.
But I'm also a son who watched my parents get older and saw how their choices affected their quality of life. I'm someone who made mistakes with my own health in my 30s. I'm a person who realized that the research I was publishing in top medical journals wasn't helping most people who actually needed it.
That's what changed everything for me.
The Turning Point
For years, I published my work in the New England Journal of Medicine, JAMA, and other top medical journals. The research was solid. It was making an impact in academic circles.
But then I realized something: Most people never read those journals. Most people don't know what’s in them because scientific writing can be hard to understand without a PhD. The important information about how to slow aging, optimize metabolism, and stay sharp as we age was not reaching the public, and was getting lost in academic language.
I got frustrated with that. I knew I had something valuable to share, but I wasn't sharing it in a way that actually reached people.
So I made a decision: I was going to translate what I know into simple, actionable strategies that real people could actually use.
That's what I'm doing now.
Popular Blogs
Fat Loss vs Muscle Loss: How Different Fasting Methods Compare
When you lose weight, what are you actually losing? Is it fat or muscle? The answer depends on how you lose the weight. Different methods give you different results.
Dr. Stephen Anton has studied how different eating patterns affect body composition. He explains the important differences between time restricted eating, alternate day fasting, and regular calorie restriction.
What Happens with Regular Calorie Restriction
When people cut calories to lose weight, they lose both fat and muscle. About one third of the weight they lose comes from muscle. Two thirds comes from fat.
This means if you lose 30 pounds by cutting calories, about 10 pounds will be muscle and 20 pounds will be fat. Losing that much muscle is a problem.
Why does this matter? Muscle keeps your metabolism high. It helps you burn calories all day long, even when you are resting. When you lose muscle, your metabolism slows down. This makes it harder to keep weight off.
Time Restricted Eating: The Muscle Protector
Time restricted eating means you eat all your food within a short window each day. Most people fast for 14 to 18 hours and eat during a 6 to 10 hour window.
For example, you might eat only between noon and 8 PM. That gives you 16 hours of fasting and 8 hours of eating. You do this every single day.
Here is the important part. During your eating window, you eat the same number of calories your body needs. You are not cutting calories. You are just eating them in a shorter time frame.
What happens to your body composition? Dr. Anton reviewed multiple studies. The results are clear. People who do time restricted eating lose fat but do not lose significant amounts of muscle.
This is very different from calorie restriction. You lose the fat you want to lose. But you keep the muscle you want to keep.
On average, people doing time restricted eating lose about 3 kilograms of fat. That is about 6 to 7 pounds. They lose this fat without losing muscle.
Alternate Day Fasting: More Fat Loss, Some Muscle Loss
Alternate day fasting is different. You fast every other day. On fasting days, you eat very little or nothing. On eating days, you eat normally.
Dr. Anton reviewed 10 clinical trials on alternate day fasting. What did he find? People lose more total weight with this approach. They lose about 6 to 7 kilograms. That is about 13 to 15 pounds.
But there is a catch. With alternate day fasting, you do lose some muscle along with the fat. Not as much muscle as with regular calorie restriction. But more than with time restricted eating.
So you have to make a choice. Do you want to lose more weight total, even if some of it is muscle? Or do you want to protect your muscle and lose less weight total?
Understanding the Trade-Offs
Let's break this down with simple numbers. These are averages from the studies Dr. Anton reviewed.
With time restricted eating, you might lose 6 to 7 pounds. Almost all of it will be fat. You keep your muscle.
With alternate day fasting, you might lose 13 to 15 pounds. Most of it will be fat. But some will be muscle.
With regular calorie restriction, you might lose 30 pounds. But 10 pounds of that will be muscle. Only 20 pounds will be fat.
Which is best? It depends on your goals and your situation.
Who Should Choose Time Restricted Eating
Time restricted eating is probably best for most people. Here is why.
You keep your muscle. This keeps your metabolism strong. It helps you maintain your weight loss long term. You look more toned and fit because you are losing fat but keeping muscle.
Time restricted eating is also easier to stick with. You do the same thing every day. It becomes a habit. You do not have to deal with full fasting days.
If you are older, time restricted eating is especially important. As you age, you naturally lose muscle. This is called sarcopenia. You do not want to speed up this process by losing more muscle through your diet.
If you exercise regularly, especially if you do strength training, time restricted eating helps you keep the muscle you work hard to build.
If you want to maintain your strength and energy, time restricted eating is the better choice.
Who Might Choose Alternate Day Fasting
Some people might prefer alternate day fasting despite the muscle loss. Here are situations where it might make sense.
If you need to lose a lot of weight quickly for health reasons, alternate day fasting gives faster results. The extra weight loss might be worth losing a little muscle.
If you are very overweight, losing some muscle might not be as big of a concern. You have more fat to lose. The health benefits of losing that fat might outweigh the concerns about muscle loss.
If you find it easier psychologically to have full fasting days followed by normal eating days, this pattern might work better for you. Some people prefer this all-or-nothing approach.
But even in these situations, you need to be careful about muscle loss. Try to eat enough protein on your eating days. Do strength training to protect your muscle.
How Long Before Muscle Breaks Down?
A common question people ask is: how many hours of fasting before your body starts breaking down muscle?
The good news is that your body does not immediately start eating your muscle when you fast. Your body is smart. It preferentially burns fat for energy during a fast.
When you fast, your body switches to burning fat and making ketones. Ketones are a clean fuel source that comes from your fat stores. Your body uses these ketones for energy instead of breaking down muscle.
This is why time restricted eating with a 14 to 18 hour fast does not cause significant muscle loss. Your body has plenty of time to burn fat without needing to break down muscle.
Even with alternate day fasting, where you fast for 24 hours or more, your body still tries to preserve muscle. But after longer fasts, some muscle breakdown can occur. This is why alternate day fasting shows more muscle loss than time restricted eating.
The Role of Protein
One way to protect your muscle during any type of fasting is to eat enough protein during your eating window.
Protein gives your body the building blocks it needs to maintain and repair muscle. If you do not eat enough protein, your body might break down muscle to get the amino acids it needs.
Aim to eat protein at each meal during your eating window. Good sources include meat, fish, eggs, dairy, beans, and legumes. If you exercise, you might need even more protein.
The Role of Exercise
Exercise, especially strength training, is crucial for protecting muscle during weight loss.
When you lift weights or do bodyweight exercises, you send a signal to your body that you need your muscle. Your body responds by trying to preserve or even build muscle.
Without this signal, your body might think you do not need all that muscle. It might allow muscle to break down more easily.
Try to do strength training at least two or three times per week. This can be lifting weights at a gym, doing bodyweight exercises at home, or using resistance bands.
Making Your Choice
So which approach should you choose? Here are some guidelines.
Choose time restricted eating if you want to lose fat while keeping all your muscle. This is best for most people, especially if you are older, if you exercise regularly, or if you want to maintain your strength and metabolism.
Choose alternate day fasting if you need to lose more weight total and faster results are more important to you than preserving every bit of muscle. This might make sense if you are very overweight and your doctor recommends faster weight loss.
With either approach, eat enough protein and do strength training. These two things help protect your muscle no matter which fasting method you choose.
Listen to Your Body
Pay attention to how you feel and how your body is changing. The scale only tells part of the story.
Take measurements of your waist, hips, arms, and legs. Notice how your clothes fit. Pay attention to your strength in the gym. These things tell you whether you are losing fat or muscle.
If you notice you are getting weaker, you might be losing too much muscle. You might need to shorten your fasting window, eat more protein, or add more strength training.
If you are maintaining or gaining strength while losing weight, that is a great sign. You are probably losing fat while keeping muscle.
The Bottom Line
Different fasting methods affect your body composition in different ways. Time restricted eating helps you lose fat without losing muscle. Alternate day fasting helps you lose more weight total but includes some muscle loss.
For most people, time restricted eating is the better choice. You lose fat, keep muscle, and maintain a strong metabolism. This makes it easier to keep weight off long term.
Whatever method you choose, eat enough protein and do strength training. These protect your muscle and help you get the body composition you want.
Your goal should not just be to lose weight. Your goal should be to lose fat while keeping or building muscle. This is what makes you look good, feel strong, and stay healthy long term.
What I've Learned (The Research, Simplified)
For the past 25+ years, I've studied one main question: How can people actually age well?
This includes research on:
How metabolism changes with age and what you can do about it.
The role of intermittent fasting and eating patterns.
How cardiovascular health affects longevity.
What keeps your brain sharp and protects against cognitive decline.
How lifestyle choices impact obesity and metabolic disease.
The key finding: You have way more control over your aging than you think.
Most people believe that aging is just something that happens to you. Energy loss, weight gain, brain fog, losing strength—they think it's inevitable.
It's not.
The research shows that your daily choices - what, when, and how much you eat, how you move, how you sleep, and how you manage stress - all directly impact how you age. These choices can actually impact your rate of aging. Not someday. Now. And in ways you can feel and measure.
That's what the science says. And that's what I see in the people I work with.
How I Help You Age Better
I've organized everything I offer around five core areas. You probably need help in more than one of these areas - most people do. The good news is if you improve in one area, you are likely to see improvements in other areas.
More Energy & Better Metabolism
You want to wake up ready to go, not drag through the day. This is about optimizing how your body processes food and fuel. Better metabolism means better energy, easier weight control, and stronger physical performance.
Brain Health & Sharp Thinking
Protecting your brain and maintaining your mental clarity as you age isn't something that happens by accident. It requires specific nutrition, sleep habits, movement, and lifestyle strategies specific to brain health. I'll show you exactly what works.
Stay Strong & Move Without Pain
Maintaining muscle, balance, and mobility is what allows you to live a full life and stay independent as you age. Whether it’s hiking, skiing, playing with your kids (or grandkids) or just moving through your day without stiffness - this matters.
Recovery & Physical Resilience
Your body needs proper recovery to stay healthy. This includes good quality sleep, stress management, and movement strategies that help you bounce back faster.
Purpose & Peace of Mind
Physical health is part of the equation. So is feeling like you're in control of your future, living with purpose, and knowing you're doing the right things at the right times.
How I Help You Age Better
I've organized everything I offer around five core areas. You probably need help in more than one of these areas - most people do. The good news is if you improve in one area, you are likely to see improvements in other areas.
Alpha Max Test 3D
All-natural testosterone booster I formulated with the one and only Funk Roberts.
The Better Fit Mask
My preferred facemask for protection and comfort. Use code: DRANTON for 10% off.
My Background (What Makes Me Qualified)
Education:
BA in Psychology from Florida State University.
Master's degree in psychology from the University of Florida.
PhD in Clinical and Health Psychology from the University of Florida.
Post-doctoral fellowship at the Pennington Biomedical Research Center.
What This Means: I studied how people actually change their behavior. How to help them adopt healthier habits that stick. How to design interventions that work for real people in real life, not just in labs.
Research & Publications:
Over 200 peer-reviewed scientific articles.
Multiple published book chapters.
Research recognized nationally and internationally.
Cited thousands of times by other scientists.
Co-Author of The Man Diet.
What This Means: My work has been tested, reviewed by other experts, and built upon. It's not opinion. It's evidence.
Current Role:
Full Professor at the University of Florida.
Associate Director, University of Florida’s Institute on Aging.
What This Means: I'm still actively researching, training the next generation of researchers, and staying current with the latest science. I'm not just relying on old knowledge. I'm learning new things all the time.
But Here's What Really Matters
All of that research and all those credentials would mean nothing if I couldn't translate what I’ve learned over the years into something useful for you.
So I've spent the last several years focusing on this: How do I take 25+ years of research and turn it into simple, clear strategies that actually work for busy adults who want to feel better and age well?
That's the real goal. And that's what I bring to the people I work with.
My Philosophy About Aging
You're Not Broken
The goal isn't to "fix" you or make you into someone else. It's to help you feel like yourself again, with the energy and clarity you want.
Small Choices Add Up
You don't need to overhaul your entire life. Consistent, small changes in nutrition, movement, sleep, and stress management compound over time. That's how real change happens.
Understanding Matters More Than Willpower
If you understand why something works, you don't need to white-knuckle it. You just follow the program because it makes sense. That's why people stick with this approach long-term.
Evidence Beats Opinion
I'm not going to tell you to do something because I think it's trendy or because an influencer is promoting it. Everything I recommend is backed by research and real-world results.
You're the Expert on Your Own Life
I provide the knowledge and framework. You know your schedule, your preferences, your challenges, and your goals. The best approach is the one that fits your actual life—not someone else's.
What People Tell Me
Finally, someone who explains why instead of just giving me rules.
I thought this kind of change wasn't possible at my age.
The strategies are practical. I can actually do them.
I feel in control of my health for the first time.
These conversations remind me why I do this work. It's not about credentials or publications. It's about helping real people take back control of their aging.
What I'm Not
I'm not a cheerleader selling you hope and motivation. Motivation fades. What lasts is understanding and practical systems.
I'm not selling quick fixes or magic pills. There aren't any. What works is science-backed strategies applied consistently.
I'm not here to shame you or make you feel bad about past choices. You're here because you want change. That's what matters.
I'm not a one-size-fits-all coach. People are different. Your program should fit your life, your goals, and your preferences—not some generic template.
What I Am
I'm someone who's spent 25+ years studying how people age well and how to help them actually implement that knowledge.
I'm committed to explaining the science in plain language so you understand why something works.
I'm focused on creating practical systems that fit your real life.
I'm dedicated to helping you feel more energetic, stronger, sharper, and more confident in your future.
I believe you have more control over your rate of aging than you think, and I want to help you take it.
Let's Work Together
You're here because you're ready to do something different. You're tired of guessing about what works. You want clear, evidence-based guidance that actually results in change.
That's exactly what I provide.
Ready to Get Started?
Or if You Have Questions:
Recent Blogs
Fat Loss vs Muscle Loss: How Different Fasting Methods Compare
When you lose weight, what are you actually losing? Is it fat or muscle? The answer depends on how you lose the weight. Different methods give you different results.
Dr. Stephen Anton has studied how different eating patterns affect body composition. He explains the important differences between time restricted eating, alternate day fasting, and regular calorie restriction.
What Happens with Regular Calorie Restriction
When people cut calories to lose weight, they lose both fat and muscle. About one third of the weight they lose comes from muscle. Two thirds comes from fat.
This means if you lose 30 pounds by cutting calories, about 10 pounds will be muscle and 20 pounds will be fat. Losing that much muscle is a problem.
Why does this matter? Muscle keeps your metabolism high. It helps you burn calories all day long, even when you are resting. When you lose muscle, your metabolism slows down. This makes it harder to keep weight off.
Time Restricted Eating: The Muscle Protector
Time restricted eating means you eat all your food within a short window each day. Most people fast for 14 to 18 hours and eat during a 6 to 10 hour window.
For example, you might eat only between noon and 8 PM. That gives you 16 hours of fasting and 8 hours of eating. You do this every single day.
Here is the important part. During your eating window, you eat the same number of calories your body needs. You are not cutting calories. You are just eating them in a shorter time frame.
What happens to your body composition? Dr. Anton reviewed multiple studies. The results are clear. People who do time restricted eating lose fat but do not lose significant amounts of muscle.
This is very different from calorie restriction. You lose the fat you want to lose. But you keep the muscle you want to keep.
On average, people doing time restricted eating lose about 3 kilograms of fat. That is about 6 to 7 pounds. They lose this fat without losing muscle.
Alternate Day Fasting: More Fat Loss, Some Muscle Loss
Alternate day fasting is different. You fast every other day. On fasting days, you eat very little or nothing. On eating days, you eat normally.
Dr. Anton reviewed 10 clinical trials on alternate day fasting. What did he find? People lose more total weight with this approach. They lose about 6 to 7 kilograms. That is about 13 to 15 pounds.
But there is a catch. With alternate day fasting, you do lose some muscle along with the fat. Not as much muscle as with regular calorie restriction. But more than with time restricted eating.
So you have to make a choice. Do you want to lose more weight total, even if some of it is muscle? Or do you want to protect your muscle and lose less weight total?
Understanding the Trade-Offs
Let's break this down with simple numbers. These are averages from the studies Dr. Anton reviewed.
With time restricted eating, you might lose 6 to 7 pounds. Almost all of it will be fat. You keep your muscle.
With alternate day fasting, you might lose 13 to 15 pounds. Most of it will be fat. But some will be muscle.
With regular calorie restriction, you might lose 30 pounds. But 10 pounds of that will be muscle. Only 20 pounds will be fat.
Which is best? It depends on your goals and your situation.
Who Should Choose Time Restricted Eating
Time restricted eating is probably best for most people. Here is why.
You keep your muscle. This keeps your metabolism strong. It helps you maintain your weight loss long term. You look more toned and fit because you are losing fat but keeping muscle.
Time restricted eating is also easier to stick with. You do the same thing every day. It becomes a habit. You do not have to deal with full fasting days.
If you are older, time restricted eating is especially important. As you age, you naturally lose muscle. This is called sarcopenia. You do not want to speed up this process by losing more muscle through your diet.
If you exercise regularly, especially if you do strength training, time restricted eating helps you keep the muscle you work hard to build.
If you want to maintain your strength and energy, time restricted eating is the better choice.
Who Might Choose Alternate Day Fasting
Some people might prefer alternate day fasting despite the muscle loss. Here are situations where it might make sense.
If you need to lose a lot of weight quickly for health reasons, alternate day fasting gives faster results. The extra weight loss might be worth losing a little muscle.
If you are very overweight, losing some muscle might not be as big of a concern. You have more fat to lose. The health benefits of losing that fat might outweigh the concerns about muscle loss.
If you find it easier psychologically to have full fasting days followed by normal eating days, this pattern might work better for you. Some people prefer this all-or-nothing approach.
But even in these situations, you need to be careful about muscle loss. Try to eat enough protein on your eating days. Do strength training to protect your muscle.
How Long Before Muscle Breaks Down?
A common question people ask is: how many hours of fasting before your body starts breaking down muscle?
The good news is that your body does not immediately start eating your muscle when you fast. Your body is smart. It preferentially burns fat for energy during a fast.
When you fast, your body switches to burning fat and making ketones. Ketones are a clean fuel source that comes from your fat stores. Your body uses these ketones for energy instead of breaking down muscle.
This is why time restricted eating with a 14 to 18 hour fast does not cause significant muscle loss. Your body has plenty of time to burn fat without needing to break down muscle.
Even with alternate day fasting, where you fast for 24 hours or more, your body still tries to preserve muscle. But after longer fasts, some muscle breakdown can occur. This is why alternate day fasting shows more muscle loss than time restricted eating.
The Role of Protein
One way to protect your muscle during any type of fasting is to eat enough protein during your eating window.
Protein gives your body the building blocks it needs to maintain and repair muscle. If you do not eat enough protein, your body might break down muscle to get the amino acids it needs.
Aim to eat protein at each meal during your eating window. Good sources include meat, fish, eggs, dairy, beans, and legumes. If you exercise, you might need even more protein.
The Role of Exercise
Exercise, especially strength training, is crucial for protecting muscle during weight loss.
When you lift weights or do bodyweight exercises, you send a signal to your body that you need your muscle. Your body responds by trying to preserve or even build muscle.
Without this signal, your body might think you do not need all that muscle. It might allow muscle to break down more easily.
Try to do strength training at least two or three times per week. This can be lifting weights at a gym, doing bodyweight exercises at home, or using resistance bands.
Making Your Choice
So which approach should you choose? Here are some guidelines.
Choose time restricted eating if you want to lose fat while keeping all your muscle. This is best for most people, especially if you are older, if you exercise regularly, or if you want to maintain your strength and metabolism.
Choose alternate day fasting if you need to lose more weight total and faster results are more important to you than preserving every bit of muscle. This might make sense if you are very overweight and your doctor recommends faster weight loss.
With either approach, eat enough protein and do strength training. These two things help protect your muscle no matter which fasting method you choose.
Listen to Your Body
Pay attention to how you feel and how your body is changing. The scale only tells part of the story.
Take measurements of your waist, hips, arms, and legs. Notice how your clothes fit. Pay attention to your strength in the gym. These things tell you whether you are losing fat or muscle.
If you notice you are getting weaker, you might be losing too much muscle. You might need to shorten your fasting window, eat more protein, or add more strength training.
If you are maintaining or gaining strength while losing weight, that is a great sign. You are probably losing fat while keeping muscle.
The Bottom Line
Different fasting methods affect your body composition in different ways. Time restricted eating helps you lose fat without losing muscle. Alternate day fasting helps you lose more weight total but includes some muscle loss.
For most people, time restricted eating is the better choice. You lose fat, keep muscle, and maintain a strong metabolism. This makes it easier to keep weight off long term.
Whatever method you choose, eat enough protein and do strength training. These protect your muscle and help you get the body composition you want.
Your goal should not just be to lose weight. Your goal should be to lose fat while keeping or building muscle. This is what makes you look good, feel strong, and stay healthy long term.
Stay Connected
Want weekly insights about aging well, metabolism, brain health, and staying strong?
Subscribe to the Newsletter and Get The Optimal Wellness Book Free
About
Stephen Anton PhD in Clinical and Health Psychology, University of Florida 25+ years researching longevity and healthy aging. Published in NEJM, JAMA, American Journal of Clinical Nutrition, and more. Recognized expert in intermittent fasting, metabolism, and cardiovascular health
© Copyright 2026 | All Rights Reserved Dr. Stephen Anton | Terms & Conditions
This information is for educational purposes only and is not a substitute for personalized medical advice. Please consult your physician before making changes to your health routine.