Show notes
Vanessa breaks down the biggest scientific takeaways and most actionable gems from her recent conversation with Dr. Lee Breen, one of the world's leading researchers in protein metabolism, resistance training and skeletal muscle health across the lifespan.
Before diving into the latest research, Vanessa shares an exciting update from her postpartum fat-loss and body-recomposition journey: she has lost five pounds since beginning her gentle fat-loss phase two weeks ago.
She explains the four simple food swaps that reduced her intake by only approximately 150–200 calories per day, why the initial change likely includes water and glycogen as well as body fat, and how she is using three to four resistance-training sessions per week to gradually reveal her muscle while continuing to exclusively breastfeed baby Taylor.
Vanessa also shares why she is deliberately giving herself the longest possible runway, why she does not expect to continue losing five pounds every two weeks, and why she plans to wait until Taylor begins eating solid foods before bringing Protein-Sparing Modified Fasting days back into her routine.
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One of the biggest themes from Dr. Breen's research is that losing weight and improving your body composition are not necessarily the same thing.
Vanessa explores why the scale cannot tell you whether you are losing fat, water or metabolically active tissue; how much lean mass may be lost during significant weight loss; and why regaining weight after dieting or discontinuing a GLP-1 medication could potentially leave someone with less muscle and a higher body-fat percentage than when they started.
She also examines how much protein may be needed to protect muscle during weight loss. Is approximately 1.4 grams per kilogram enough, or should you aim closer to 2–2.2 grams per kilogram? And how should that target change based on your body size, activity level, age and the aggressiveness of your calorie deficit?
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Vanessa explains why protein and resistance training are most powerful when used together, why at least two whole-body resistance-training sessions per week can provide an effective starting point, and how training tells the body where the amino acids from dietary protein are needed.
She also unpacks Dr. Breen's research comparing whey and pea protein in middle-aged and older adults. Whey produced a greater leucine response—but did that translate into more muscle protein synthesis over the complete 10-day intervention?
The full results were more nuanced than a simple animal-versus-plant-protein conclusion. They also revealed something potentially even more important about the effect of resistance training on the muscle's ability to use the protein being consumed.
Vanessa finishes with Dr. Breen's fascinating prehabilitation research showing that a single resistance-training session helped protect older adults' muscle during five days of bed rest, emerging evidence on whey protein and glycemic control, and the essential questions anyone using a GLP-1 medication should consider to help protect muscle and improve the quality of their weight loss.
In this episode:
- Vanessa's latest postpartum fat-loss and body-recomposition update
- How she lost five pounds during her first two weeks of gentle dieting
- Why those five pounds are unlikely to represent body fat alone
- The four simple swaps that reduced her intake by approximately 150–200 calories per day
- Why she expects her rate of weight loss to slow from here
- How she is approaching fat loss while exclusively breastfeeding
- Why she is deliberately giving herself a longer fat-loss runway
- Her goal of protecting her muscle—and potentially more facial fat and collagen—this time
- Why she is waiting until Taylor begins solid foods before reintroducing PSMF days
- How three to four weekly resistance-training sessions are supporting her body recomposition
- Why she plans to complete another DEXA scan at the end of the process
- Why losing weight and improving body composition are not necessarily the same thing
- How much lean mass may be lost during significant weight loss
- Why lean mass loss is not always identical to contractile-muscle loss
- What may happen to body composition when lost weight is regained
- The potential consequences of losing fat and muscle but regaining predominantly fat
- Why the scale should not be your only measure of progress
- DEXA scans, measurements, strength, performance, photographs and clothing fit
- Why muscle preservation must be built into a fat-loss plan from the beginning
- Is 1.4 grams of protein per kilogram enough during weight loss?
- When 2–2.2 grams per kilogram may provide additional muscle protection
- Why the conventional protein RDA should not be treated as an optimal fat-loss target
- When goal weight, adjusted body weight or estimated lean mass may provide a more appropriate calculation
- Why protein and resistance training work better together
- How training helps your muscles use the amino acids you consume
- Why two whole-body resistance-training sessions per week can be an effective starting point
- How to begin resistance training without a complicated program or gym membership
- Why breakfast may be the most important protein meal to improve
- The potential benefits of approximately 0.4 grams of protein per kilogram per meal
- How to create a breakfast containing approximately 25–40 grams of protein
- Why two eggs may not provide as much protein as many people assume
- When protein's appetite-suppressing effect is helpful—and when it may not be
- Why an enormous protein shake could be counterproductive for a frail older adult with a low appetite
- Whey protein vs. pea protein in Dr. Breen's latest research
- Why whey produced a greater leucine response
- Did the higher leucine response produce more muscle protein synthesis?
- Why well-planned plant protein can still support muscle remodeling
- When protein quality may become more consequential
- Why nothing has consistently outperformed whey protein
- Why whey can be especially efficient when calories or appetite are limited
- The benefits of a "food first, but not food always" approach
- When a protein supplement can be a practical tool
- Why ingredient quality and third-party testing matter
- Could one resistance-training session help protect muscle for five days?
- What prehabilitation may mean before planned surgery or predictable inactivity
- How Vanessa used a similar strategy before delivering her babies
- Why building muscle now creates a reserve for future illness, injury or inactivity
- Can whey protein help improve post-meal glycemic control?
- Why the idea that whey is automatically bad for blood sugar because it stimulates insulin is overly simplistic
- Previous research using approximately 15 grams of whey with or before carbohydrate-rich meals
- Dr. Breen's ongoing trial in adults over 75 with obesity and type 2 diabetes
- The difference between completed findings and promising ongoing research
- Why protein, resistance training and diet quality become more important—not less—when using a GLP-1 medication
- The questions every GLP-1 user should consider about protein, strength, fiber, micronutrients and long-term maintenance
- Vanessa's practical action plan for losing fat while protecting muscle
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 this podcast.
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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.
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