Optimal Protein Podcast with Vanessa Spina

What actually happens inside your fat cells when you practice time-restricted eating—and can meal timing help you lose body fat without sacrificing muscle?

Dr. Satchin Panda, one of the world's leading researchers on circadian rhythms and time-restricted eating, returns to the Optimal Protein Podcast to unpack fascinating new human research examining time-restricted eating, body composition, inflammation and changes in gene activity inside fat tissue.

Dr. Panda explains why fat tissue is far more than a passive storage depot. We explore how fat cells have their own circadian clocks, why excess fat can become pro-inflammatory, and how aligning eating and fasting periods may influence the pathways involved in fat breakdown and inflammation.

We also tackle one of the biggest concerns surrounding intermittent fasting: Does time-restricted eating cause muscle loss? Dr. Panda explains why some earlier studies raised this concern, what newer research is showing, and why protein intake, diet quality and resistance training remain essential—especially as we age.

We discuss:

• The new human study examining time-restricted eating and fat tissue • What researchers discovered about gene activity inside fat cells • How time-restricted eating may change the way stored fat is mobilized • Why visceral and excess body fat can become pro-inflammatory • How the circadian clock coordinates fat metabolism • Why TRE may naturally reduce calories, alcohol and late-night processed foods • Whether the benefits extend beyond simple calorie restriction • Does intermittent fasting cause muscle loss? • Why adequate protein and resistance training matter during fat loss • Why an 8–10 hour eating window may be a practical approach • Earlier dinner vs. later breakfast—which matters more? • Why Dr. Panda recommends finishing your last meal about 3 hours before bed • Why he recommends waiting approximately 1–2 hours after waking before breakfast • Black coffee, morning lattes and whether they "break" the fasting period • What research in athletes tells us about TRE and body composition • Meal timing, glucose regulation and metabolic health • New preliminary research combining meal timing, exercise, daylight exposure and sleep consistency • The surprising effects observed in older adults after only 60 days • Dr. Panda's practical framework for organizing sleep, meals, movement and light exposure for healthy aging

Dr. Panda also shares how he structures his own mornings, why consistency matters more than perfection, and the simple daily habits he believes can have an outsized impact on metabolic health and healthy aging.

This conversation goes far beyond "when should I eat?" It's a fascinating look at how protein, resistance training, circadian biology, sleep and meal timing can work together to support fat loss while preserving the muscle we work so hard to build.

RESOURCES

⭐ Protein Sparing Modified Fasting Library™ Get the complete high-protein system featuring recipes, structured meal frameworks, grocery lists and strategies designed to support fat loss while prioritizing satiety and lean mass. Visit KetogenicGirl.com and use code VANESSA for 20% off.

AirDoctor Upgrade the air quality in your home with AirDoctor's powerful filtration systems. Visit AirDoctorPro.com and use code VANESSA to get up to $300 off select AirDoctor models plus a free 3-year warranty.

CONNECT WITH DR. SATCHIN PANDA

Learn more about Dr. Panda's research, books and work on circadian biology and time-restricted eating at SatchinPanda.com and follow him on Instagram and X.

CONNECT WITH VANESSA

Instagram: @ketogenicgirl Instagram: @optimalproteinpodcast Optimal Protein Podcast Facebook Community

This podcast is for educational and informational purposes only and is not medical advice. Always consult your physician or qualified healthcare provider regarding your individual health, nutrition and exercise needs.

How many calories does it actually take to build muscle—and do you really need to eat in a surplus?

In this Friday solocast, I recap my conversation with Dr. Milo Wolf, exploring a new paper modeling the energy cost of building muscle and what it means for the familiar advice to "eat more to grow."

We discuss how muscle gain and fat loss can happen together, why protein matters, and how to make your workouts effective when time is limited!

You'll learn:

• Why building muscle doesn't automatically require bulking—and how stored body fat can help supply energy. • What an energy-cost model can tell us, and why it cannot prescribe your exact calorie needs. • Milo's protein recommendations for supporting muscle growth and preserving muscle during fat loss. • How brief, challenging workouts can deliver results. • Training close to failure, emphasizing the stretched position, and saving time with supersets and drop sets. • How to approach a calorie deficit while supporting muscle, performance, and recovery.

Plus, I unpack a fascinating mouse study on changes in fat tissue following strength training—even before body weight changed—and explain why mobilizing fat is different from losing it.

Listen to the full interview with Dr. Milo Wolf for our deeper dive into the research!

Explore the PSMF Library, the Tone device and Tone LUX red light therapy at ketogenicgirl.com. Get 20% off with the code VANESSA

This podcast is for informational and educational purposes only and does not constitute medical advice. Consult your qualified healthcare professional for advice specific to your health and circumstances.

Can you build muscle without bulking—and could stored body fat help fuel the process?

Dr. Milo Wolf joins me to unpack new research on the energetic cost of building muscle and what it means for losing fat while gaining or preserving muscle, even for experienced lifters.

We discuss:

• Why a calorie surplus may not be necessary for muscle growth. • His protein recommendations for body recomposition. • Balancing fat loss with muscle retention and recovery. • How little resistance training can still produce results. • Using lengthened partials, supersets, and drop sets to make workouts more efficient.

Join me Friday for my solo recap and top takeaways!

Thank you to our sponsor, AQUATRU!

Get 20% off your AquaTru water purifier at AquaTru.com with code VANESSA! Includes a 30-day best-tasting water guarantee or your money back.

SAVE ON THE PSMF LIBRARY™ & TONE LUX

Explore the Protein-Sparing Modified Fasting Library™ and the Tone LUX red light therapy collection at Ketogenic Girl. Save 20% with code VANESSA

DISCLAIMER

This podcast is for educational and informational purposes only and is not medical advice. Consult your healthcare professional before changing your diet, exercise routine, or supplement use. Guest opinions are their own, and individual results vary.

This episode contains paid advertising and promotions for my own products. Some links may be affiliate links, meaning I may earn a commission at no additional cost to you.

Does increasing fat burning automatically mean losing more body fat? And what would we need to measure to know whether an intervention preserves muscle?

In this Friday solocast, I'm revisiting my conversation with Dr. Amie Hornaman to unpack the research on T2, a lesser-known thyroid hormone derivative, and connect the mechanisms to the body composition questions we care about.

We go inside the mitochondria to explore how fatty acids enter, how our cells regulate fuel use, and how mitochondrial uncoupling releases energy as heat. I also revisit the brown fat research and potential connections with ketogenic metabolism.

Along the way, I clarify several findings from the interview—including what "50% less fat mass" meant in the rat study, why lower body weight does not establish fat-only loss, and why changes in muscle-cell metabolism do not prove muscle preservation.

The T2 research is intriguing, but human evidence remains very limited. This recap explores what the findings suggest, what they cannot establish, and the practical steps we can take now to support muscle and metabolic health.

BACK-TO-SCHOOL SALE!

For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer.

In this episode, I discuss:

• What T2 is and how it relates to T3 and T4.
• What the 2005 rat study actually found about fat accumulation.
• The carnitine shuttle and how fatty acids reach the mitochondria.
• How AMPK, ACC, and malonyl-CoA help regulate fat oxidation.
• Mitochondrial uncoupling, ATP production, and heat generation.
• Brown fat thermogenesis and why an animal's thyroid status matters.
• Possible connections with keto—and why shared pathways do not establish added benefits.
• The difference between burning dietary fat and losing stored body fat.
• The two-participant human T2 report and Amie's uncontrolled 14-woman project.
• What stronger human research would need to measure.
• Thyroid safety questions and the importance of appropriate prescribed treatment.
• Lean mass versus skeletal muscle during weight loss.
• Practical ways to prioritize protein, resistance training, and consistency.
• Questions to bring to your clinician if you have persistent symptoms.

Research discussed

• Lanni and colleagues, 2005: T2, fat accumulation, and liver fatty acid oxidation in high-fat-fed rats. Read the study
• Lombardi and colleagues, 2009: T2, skeletal muscle fatty acid oxidation, AMPK signaling, and thermogenesis. Read the study
• Antonelli and colleagues, 2011: Preliminary human report on resting metabolic rate and body weight in two participants. Read the study
• Cavallo and colleagues, 2013: Rapid liver-cell responses to T2 in hypothyroid rats. Read the study
• Lombardi and colleagues, 2015: Brown fat thermogenesis in hypothyroid rats. Read the study

Additional research and resources

• Luukkonen and colleagues, 2020: A short human study of ketogenic eating, liver fat, and hepatic mitochondrial metabolism. Read the study
• Hall and colleagues, 2015: A controlled human study illustrating the distinction between increased fat oxidation and net body-fat loss. Read the study
• Longland and colleagues, 2016: Protein and exercise during an energy deficit. Read the study
• Padron and colleagues, 2014: T2 and thyroid suppression in rats. Read the study
• Jonas and colleagues, 2015: T2, thyroid regulation, and potential cardiac effects in mice. Read the study
• American Thyroid Association: Thyroid treatment and testing information. Thyroid hormone treatment | Thyroid function tests

Listen to the full conversation with Dr. Amie Hornaman in the podcast feed.

Thank you so much for spending this time with me! If you enjoyed the episode, please share it with a friend who loves understanding the science behind metabolism and body composition.

Disclosure and medical disclaimer

Dr. Amie Hornaman sells the T2-containing supplement discussed in the original interview. This recap is educational and does not endorse or recommend purchasing or taking it. Supplemental T2's long-term safety has not been established, and some animal studies have raised concerns about thyroid suppression and heart effects.

Do not start T2, substitute it for prescribed treatment, or change your thyroid medication based on this episode. Consult a qualified healthcare professional about your individual circumstances.

What is T2, and why have researchers been investigating its effects on metabolism?

In this episode of the Optimal Protein Podcast, I'm welcoming back Dr. Amie Hornaman to explore 3,5-diiodothyronine, commonly called T2—a lesser-known thyroid hormone derivative studied for its effects on energy expenditure, fatty acid oxidation, and mitochondrial function.

Thank you to our sponsor, AirDoctor!

Visit ⁠AirDoctorPro.com and use promo code VANESSA for up to $300 off select AirDoctor models, plus a free 3-year warranty. All AirDoctor air purifiers come with a 30-day money-back guarantee.

We walk through research on liver cells, skeletal muscle, and brown fat, unpacking the machinery that helps fatty acids enter the mitochondria and a process called mitochondrial uncoupling, in which energy is released as heat.

We also explore possible connections with ketogenic diets and the question that matters so much to us here: what could these findings mean for losing body fat while preserving muscle?

Much of the research discussed comes from animal studies. We examine a small human report involving just two participants, and Amie shares observations from an uncontrolled group of 14 women who used her T2-containing product. These findings raise interesting questions, but they do not establish that supplemental T2 is a safe or effective approach to fat loss.

BACK-TO-SCHOOL SALE!

For a limited time, save 40% sitewide at ⁠ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer.

In this episode, we discuss:

• What T2 is and how it relates to the better-known thyroid hormones T3 and T4.
• The 2005 rat study reporting less fat accumulation and greater liver fatty acid oxidation.
• How the carnitine shuttle helps transport long-chain fatty acids into the mitochondria.
• AMPK, ACC, and malonyl-CoA—and their roles in regulating fat oxidation.
• Mitochondrial uncoupling, ATP production, and thermogenesis.
• Research on T2 and brown fat in animals with low thyroid function.
• Potential overlaps with ketogenic metabolism.
• The limited human evidence and the need for larger, controlled studies.
• Why increased fat burning, lower body weight, and muscle preservation are different outcomes.
• Protein, resistance training, and body composition during weight loss.

Important context for interpreting the research

The approximately 50% lower fat mass reported in the 2005 rat study was a comparison with the untreated high-fat-diet group. It does not mean the animals lost half of their starting body fat.

The 2011 human report described approximately 4% lower body weight, not proof that all weight lost was fat. Neither that report nor the uncontrolled 14-woman project establishes long-term safety or that T2 caused the reported changes.

Changes in muscle-cell fuel use do not establish muscle preservation during weight loss. Shared metabolic pathways also do not establish that combining keto and T2 provides additional benefits.

Studies discussed

• Lanni and colleagues, 2005: T2, fat accumulation, and liver fatty acid oxidation in rats receiving a high-fat diet. ⁠Read the study
• Lombardi and colleagues, 2009: T2, skeletal muscle fatty acid oxidation, AMPK signaling, and thermogenesis in rats. ⁠Read the study
• Antonelli and colleagues, 2011: Preliminary human report on T2, resting metabolic rate, and body weight in two participants. ⁠Read the study
• Cavallo and colleagues, 2013: Rapid effects of T2 on fatty acid oxidation and mitochondrial function in liver cells from hypothyroid rats. ⁠Read the study
• Lombardi and colleagues, 2015: T2 and brown adipose tissue thermogenesis in hypothyroid rats. ⁠Read the study

Additional safety references

• Padron and colleagues, 2014: T2 administration, central hypothyroidism, and effects on thyroid-sensitive tissues in rats. ⁠Read the study
• Jonas and colleagues, 2015: T2's effects on thyroid regulation, body composition, energy metabolism, and heart weight in mice. ⁠Read the study

Thank you so much for listening! If you enjoyed exploring the science with us, please share this episode with a friend who loves learning about metabolism and body composition.

Join me on Friday for my solocast recap, where I'll revisit the key mechanisms, clarify what the studies do and don't show, and connect the discussion to practical takeaways for supporting muscle and metabolic health.

Guest disclosure and medical disclaimer

Dr. Amie Hornaman sells the T2-containing supplement discussed. This episode is educational and does not endorse or recommend purchasing or taking it. Some animal studies have raised concerns about thyroid suppression and heart effects; availability without a prescription does not establish safety.

Do not start T2, substitute it for prescribed treatment, or change your thyroid medication based on this episode. Consult a qualified healthcare professional about your individual circumstances.

Correction: In the mitochondrial uncoupling discussion, we meant DNP, not DMT.

Burn More Fat—But Are You Losing It? 7 Takeaways on Metabolic Flexibility & Protecting Muscle

Does becoming a better fat burner automatically mean you're losing more body fat? And do higher ketones mean better results?

In today's episode, I'm unpacking seven of my biggest takeaways from my conversation with Dr. Mike T. Nelson about metabolic flexibility, sustainable fat loss, and protecting your hard-earned muscle.

I'm sharing what I learned the hard way during my own keto journey—including how I gained weight despite having high ketones—and why understanding the difference between burning dietary fat and losing stored body fat can change how you approach your goals.

We're also exploring how to adjust carbohydrates to support your training, why fasted cardio is optional, and how small, manageable food changes can help you make progress while still enjoying your meals and your life!

In this episode, we explore:

1. What metabolic flexibility really means: Using fat and carbohydrates effectively and switching between fuels as your needs change.
2. Fat burning versus fat loss: Why increased fat oxidation and higher ketones don't automatically mean you're losing stored body fat.
3. Calories, hunger, and sustainability: Why an energy deficit matters—and why how you feel while creating it matters, too.
4. Matching carbohydrates to your training: How your activity, intensity, preferences, and recovery can guide your fueling choices.
5. Fasted cardio and the "fat-burning zone": Why the fuel you use during a workout doesn't tell the whole story about long-term fat loss.
6. Protecting muscle while losing weight: The combined importance of protein, resistance training, and recovery, plus a discussion of protein-sparing modified fasting and its limitations.
7. Building capacity beyond the scale: Tracking strength, aerobic fitness, energy, and recovery alongside changes in body weight.

I also share the gentle nutrition adjustments I'm making during breastfeeding and why this is a different approach from aggressive dieting or protein-sparing modified fasting.

You don't have to optimize everything at once. Choose one takeaway you can put into practice this week—whether that's tracking your weights and reps, making a simple food swap, or fueling your workouts in a way that helps you feel your best.

Listen to the full conversation

For the deeper dive, listen to my interview with Dr. Mike T. Nelson: Burning Fat vs. Losing Fat: Metabolic Flexibility Explained with Dr. Mike T. Nelson.

Resources & special offer

By popular request, the Back to School Sale has been extended for one more week! Save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40.

Explore:

• The Protein Sparing Modified Fasting Library: High-protein recipes, grocery lists, meal frameworks, instant digital access, a premium printed edition, and community access.
• Tone LUX Red Light Therapy: Discover the Sapphire, Diamond, and Gem panels, plus the Crystal mask and Contour neck and décolleté accessory.
• Tone Device: Explore the breath ketone device discussed in the episode.

Let's connect

Which takeaway resonated with you most? Have you ever assumed higher ketones meant greater fat loss, or found that changing your fuel intake helped your training? I would love to hear from you!

If you enjoyed this episode, please follow the Optimal Protein Podcast and leave a rating or review. Thank you so much for listening and being part of this community!

Disclaimer: This podcast is for educational purposes only and is not medical advice. Consult your healthcare provider before changing your diet, fasting, or exercise routine. Aggressive calorie restriction and protein-sparing modified fasting are not presented as approaches for breastfeeding listeners. Individual results vary.

Does burning more fat for fuel mean you're actually losing more body fat? And if you're in ketosis, does that mean the fat you're burning is coming from your body—or from the food you just ate?

Today on the Optimal Protein Podcast, I'm joined by Dr. Mike T. Nelson to unpack this important distinction and explore what metabolic flexibility really means for fat loss, muscle preservation, and performance.

BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer.

Mike holds a PhD in exercise physiology and a master's degree in mechanical engineering with a focus on biomechanics. In this fascinating conversation, we explore your body's ability to use both carbohydrates and fat, switch between them, and adapt to different demands.

We discuss why burning more fat during a workout doesn't necessarily translate into greater body-fat loss, why calorie balance still matters, and how your nutrition and training can work together to support body recomposition. I also share my own experience gaining weight on keto despite high ketone readings—and what that taught me about dietary fat versus stored body fat.

In this episode, we discuss:

• The three components of metabolic flexibility—and why using carbohydrates effectively matters, too • Burning fat versus losing fat: the distinction that can change how you approach your goals • How insulin and fuel availability influence what your body burns • Why higher ketone readings don't necessarily mean greater body-fat loss • Fasted cardio: what the research suggests and where questions remain • Long-term keto and the potential tradeoffs for high-intensity exercise • Adjusting carbohydrates to support your training performance • Protein-sparing modified fasting and the considerations around more aggressive calorie deficits • Why stubborn lower-body fat can be especially frustrating for women • Protein and resistance training: their roles in preserving lean mass while dieting • Building aerobic fitness to support metabolic flexibility over time • Heat, cold exposure, and Mike's broader framework of physiologic flexibility • Lactate as a valuable fuel and the emerging interest in lactate supplements • Tracking performance alongside the scale—and keeping maintenance in mind from the beginning

I loved Mike's emphasis on building a body that can perform well while you work toward your body-composition goals. This episode is full of thoughtful distinctions to help you better understand the science behind fat loss!

Connect with Dr. Mike T. Nelson: Instagram: @drmiketnelson Explore his newsletter for more on body composition, performance, and metabolic flexibility.

Special offers mentioned in this episode:

Save 40% sitewide at ⁠KetogenicGirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library and Tone Device.

Australia and New Zealand listeners: save 75% during the warehouse moving sale with code WAREHOUSE75.

If you enjoyed this episode, please subscribe, leave a rating or review, and share it with a friend. Your support helps us continue bringing you conversations with leading researchers and experts in protein, metabolic health, and body composition.

Follow @ketogenicgirl and @optimalproteinpodcast on Instagram, and join the Optimal Protein Podcast Facebook group for more discussion.

The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

Can you gain lean tissue while losing body fat? And if two people eat the same number of protein grams, will they necessarily get the same body composition results?

In this episode, Vanessa shares six takeaways from her conversation with Dr. Drew Gonzalez on the science of fat loss, muscle retention, protein quality, creatine, and sustainable nutrition.

BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com⁠ with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer.

A 12-week study discussed in the interview found that adults combining an exercise and weight-loss program with creatine gained lean tissue while reducing body fat. Vanessa unpacks why that result is exciting, what "lean tissue" actually measures, and why the change in body fat percentage needs careful interpretation.

In this episode:

• Why the quality of weight loss matters more than the number on the scale alone
• What the creatine study found about lean tissue and body fat during a weight-loss program
• Whether protein quality may matter more when calories are limited
• What a study comparing pork- and soy-based meals in military cadets found about recovery
• How much protein Dr. Gonzalez suggests as a practical starting goal for people who resistance train
• Why you don't need perfectly timed or evenly divided protein meals
• What firefighter research can—and cannot—tell us about time-restricted eating
• Where the evidence stands on creatine and cognition, probiotics, and other emerging supplements

The central question: How can you lose body fat while giving yourself the best chance of maintaining—or even gaining—lean tissue?

Listen to Vanessa's full interview with Dr. Drew Gonzalez for the complete conversation.

Follow @ketogenicgirl and @optimalproteinpodcast on Instagram, and join the Optimal Protein Podcast Facebook group to continue the discussion.

BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com⁠ with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer.

The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

Can you lose body fat while gaining lean tissue—even during a calorie deficit? And could the quality of your protein change how well you recover and protect muscle?

Vanessa is joined by exercise and nutrition researcher Dr. Drew Gonzalez to explore new research on creatine, body recomposition, protein quality, and what it takes to make weight loss more than a lower number on the scale.

Try my favorite electrolytes! Cure Hydration. Visit curehydration.com/VANESSA and use code VANESSA for 20% off. Now available on Amazon!

They begin with a 12-week study in middle-aged and older adults that tested creatine alongside exercise and a weight-loss diet. Vanessa and Dr. Gonzalez discuss the promising body-composition findings, why gaining lean tissue is not necessarily the same as gaining that amount of muscle, and what the study can—and cannot—tell us about fat loss and cognitive health.

They also explore research comparing pork- and soy-based meals during intense training, the role of essential amino acids and leucine when calories are limited, and practical protein targets for people who want to lose fat without unnecessarily losing muscle.

In this episode:

• What a new creatine study found about lean tissue and body fat during weight loss
• Whether someone eating plenty of meat still stands to benefit from creatine supplementation
• What we know—and don't yet know—about higher creatine doses and brain health
• Why two diets with the same protein grams may differ in essential amino acid content
• What Dr. Gonzalez's military cadet study found about protein sources and recovery
• How much protein to aim for while resistance training and losing body fat
• Whether protein needs to be evenly distributed across meals
• What firefighter research reveals about time-restricted eating in demanding real-world conditions
• Whether probiotics and synbiotics meaningfully add to a structured fat-loss program

The goal isn't simply to lose weight. It's to improve what you lose—and what you keep.

BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer.

Follow @ketogenicgirl and @optimalproteinpodcast on Instagram, and join the Optimal Protein Podcast Facebook group for more discussion.

The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

Vanessa breaks down the biggest scientific takeaways and most actionable gems from her recent conversation with body-composition expert and author Lyle McDonald.

Why does fat come off easily from some areas while other areas seem determined to hold on? And can we influence stubborn fat loss without simply getting leaner everywhere else?

Create your own custom protein blend at truenutrition.com/vanessa and use code VANESSA for 20% off your first order. Let Vanessa know what your custom blend is! Now shipping internationally.

Vanessa explores the physiology of stubborn body fat, including fat mobilization, blood flow, oxidation and alpha-2 receptors, and why women in particular may notice their upper body becoming lean long before their hips and thighs.

She also breaks down Lyle's newest approach, Intermittent Modified Fasting, and how alternating protein-focused, low-calorie days with maintenance days may offer a more flexible way to create a calorie deficit while prioritizing muscle retention.

Vanessa explains why protein becomes especially important during aggressive calorie restriction, why a maintenance day is different from a "cheat" or "feast" day, and how meal timing, appetite and ketosis can influence how sustainable a fat-loss phase feels.

She also examines Lyle's proposed strategies for addressing stubborn fat—including lower-carbohydrate eating and combining higher-intensity intervals with lower-intensity activity—while separating established physiology from strategies that still require more research.

YOHIMBINE SAFETY NOTE: Yohimbine is discussed in this episode for educational purposes only and is not being recommended for use. Yohimbine can cause significant side effects, including anxiety, increased heart rate and blood pressure, and may interact with medications. It should not be used during pregnancy or breastfeeding. Anyone considering yohimbine should first consult with a qualified healthcare professional.

Finally, Vanessa explores the scientific mechanisms behind yohimbine and alpha-2 receptors for educational purposes, red-light therapy and blood flow, whether slower weight loss could help preserve facial fullness, and why having a maintenance strategy may be just as important as having a fat-loss strategy.

• Why some areas of body fat are more resistant to fat loss
• Why women may lose upper-body fat before hip and thigh fat
• Alpha-2 vs. beta receptors and stubborn-fat physiology
• Fat mobilization vs. fat oxidation vs. actual body-fat loss
• Why blood flow matters in stubborn fat stores
• Protein-Sparing Modified Fasting (PSMF) explained
• Lyle's Intermittent Modified Fasting approach
• Why protein matters on very-low-calorie days
• Maintenance days vs. cheat or feast days
• How to structure lower-calorie and maintenance days around training and life
• Why meal timing should help manage your appetite
• Time-restricted eating vs. intermittent modified fasting
• Protein, ketosis, satiety and food preoccupation
• Lower-carbohydrate eating and stubborn-fat mobilization
• Higher-intensity intervals followed by lower-intensity activity
• Why walking may fit into Lyle's stubborn-fat protocol
• Why more cardio is not necessarily better during aggressive dieting
• Red-light therapy, blood flow and what the evidence does—and does not—show
• Yohimbine, alpha-2 receptors and important safety considerations
• Why mobilizing more fat does not guarantee greater fat loss
• Resistance training and preserving lean mass during fat loss
• How to create a long-term weight-maintenance range
• Why small course corrections may help prevent larger weight regain
• Can slower weight loss help preserve facial fullness?
• Genetics, aging and individual patterns of fat loss
• Why your leanest possible weight may not be where you look or feel your best
• Vanessa's practical takeaways for sustainable fat loss and body recomposition

BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer.

Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last.

Follow @ketogenicgirl and @optimalproteinpodcast on Instagram to see visuals and posts mentioned on the podcast.

Link to join the Facebook group for the podcast.

The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements or exercise regimen.