Optimal Protein Podcast with Vanessa Spina

Dr. Khashayar Farzam, an emergency and obesity medicine physician and metabolic health researcher, explores testosterone’s often-overlooked role in women’s health. They discuss menopause, hormone therapy, SHBG, metabolism, cognition, muscle, and strength. He also breaks down a surprising lifter case: substantial fat loss and preserved muscle, yet a major drop in bench-press performance.

Can you use meal timing to lose body fat without sacrificing muscle—and does time-restricted eating actually change what is happening inside your fat cells? In this Friday episode, Vanessa breaks down 8 of the biggest takeaways from her conversation with world-renowned circadian researcher Dr. Satchin Panda, including fascinating new human research examining time-restricted eating, adipose tissue, inflammation and body composition. This isn't about extreme fasting or eating one meal a day. Instead, Vanessa explores how a practical 8–10 hour eating window may fit alongside adequate protein, resistance training and a sustainable calorie deficit—and why simply changing when you stop eating may naturally eliminate some of the least nutritious calories of the day. In this episode: • What researchers discovered by examining human fat tissue • How time-restricted eating affected pathways involved in fat metabolism • Why your fat cells have their own circadian clocks • How excess adipose tissue can contribute to inflammation • Does intermittent fasting cause muscle loss? • Why protein and resistance training change the conversation • Why extreme fasting isn't necessary • The practical case for an 8–10 hour eating window • Earlier dinner vs. later breakfast—which should you prioritize? • Why Dr. Panda recommends finishing dinner roughly 3 hours before bed • How late-night eating may affect glucose regulation • Why you may not need to eat immediately after waking • How TRE can unintentionally eliminate alcohol, desserts and late-night snacking • Why meal timing may offer benefits beyond calorie restriction • How sleep consistency, daylight, exercise and meal timing work together • Vanessa's practical framework for losing fat while protecting lean mass The biggest takeaway: meal timing can be a useful tool, but it doesn't replace the fundamentals. Protein intake, resistance training, overall nutrition, energy balance and sleep still matter enormously. The goal isn't simply to lose weight. It's to lose body fat while maintaining the metabolically active muscle you've worked so hard to build. Listen to Vanessa's full conversation with Dr. Satchin Panda in Monday's episode for the complete discussion of his newest research. ⭐ PROTEIN SPARING MODIFIED FASTING LIBRARY™ Vanessa's complete high-protein system features satisfying high-protein recipes, structured meal frameworks, grocery lists and strategies designed to support fat loss while prioritizing lean mass. Visit KetogenicGirl.com and use code VANESSA for 20% off. CONNECT WITH VANESSA Instagram: @ketogenicgirl Instagram: @optimalproteinpodcast Join the Optimal Protein Podcast community on Facebook. 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.

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.

Dr. Milo Wolf, a resistance-training researcher focused on hypertrophy and practical strength science, explores whether bulking is truly necessary. They discuss protein targets, the surprisingly low energy cost of building muscle, fat-fueled recomposition, sustainable fat loss, and training strategies that save time, including stretch-biased work, supersets, drop sets, and minimal effective volume.

A deep dive into T2, thyroid biology, and the mitochondrial machinery behind fat oxidation. Explore the carnitine shuttle, AMPK, mitochondrial uncoupling, brown fat thermogenesis, and possible links to ketogenic metabolism. The discussion also examines what rat studies and limited human research can really show about fat loss, muscle preservation, thyroid safety, and the measurements future studies need.

Dr. Amie Hornaman, thyroid specialist, educator, author, and founder of Fix Your Thyroid, explores T2, a lesser-known thyroid hormone derivative. They discuss mitochondrial fat burning, the carnitine shuttle, AMPK, brown fat, ketogenic metabolism, and the limited human research on T2 supplements. Safety questions, thyroid medication, and how to design better studies round out the conversation.

Can high ketones and better fat burning still fail to reduce body fat? This conversation breaks down metabolic flexibility, the difference between burning dietary fat and losing stored fat, and how calories, hunger, and sustainability shape progress. It also explores fueling workouts with carbohydrates, the reality of fasted cardio, protecting muscle with protein and strength training, and measuring progress beyond the scale.

Dr. Mike T. Nelson, an exercise physiologist and biomechanical engineer with a PhD in exercise physiology, explores metabolic flexibility and body composition. They unpack why burning fat during exercise is not the same as losing body fat, how ketones and dietary fat fit in, whether fasted cardio helps, keto’s impact on high-intensity performance, protein-sparing fasting, and strategies for preserving lean mass.

Can you lose body fat while maintaining or even gaining lean tissue? This discussion explores creatine and body recomposition, protein quality during calorie restriction, practical protein targets, meal timing, and what emerging research says about creatine for cognition and probiotics. It also examines sustainable fat-loss foundations, including resistance training, recovery, sleep, and realistic nutrition routines.