Protein-sparing modified fasting (PSMF) has been used for decades as one of the most effective evidence-based approaches for rapid fat loss while preserving lean muscle. But how does it actually work, and who is it best suited for?

Check out the Protein-Sparing Modified Fasting Library at ketogenicgirl.com and use code VANESSA for 20% off.

In this episode, Vanessa sits down with returning guest Dr. David Jockers to explore the science behind PSMF, why prioritizing protein changes everything during a calorie deficit, and how this approach differs from traditional fasting, keto, and fasting-mimicking diets.

They discuss ketosis, satiety, autophagy, resistance training, meal structure, protein targets, refeeding strategies, and the lifestyle habits that make rapid fat loss both more effective and more sustainable.

If your goal is fat loss without sacrificing muscle, this episode provides a practical, science-backed roadmap to implementing protein-sparing modified fasting safely and effectively.

In This Episode

What protein-sparing modified fasting (PSMF) is
How PSMF differs from fasting, keto, and fasting-mimicking diets
Why high protein supports muscle preservation during fat loss
How ketosis and protein work together to reduce hunger
The connection between PSMF, autophagy, and metabolic health
Protein, fat, and carbohydrate targets for PSMF days
The best foods to prioritize for successful PSMF
Meal timing and intermittent fasting considerations
Why resistance training is essential for preserving lean mass
Hydration, electrolytes, sleep, and recovery strategies
Refeeding after PSMF and avoiding rebound weight gain
Who should—and shouldn't—use this approach
Common mistakes that limit fat loss success

Resources

The PSMF Library is officially live 🎉

This is the exact structured, high-protein approach Vanessa used for fat loss and body recomposition — without restricting calories every single day.

Instead of guessing what to eat or starting over each week, you'll follow a clear, repeatable system combining high-protein, lower-energy days with maintenance days.

✨ What's Included

📘 Premium printed PSMF Library ⚡ Instant digital access 🥩 High-protein, low-carb recipe library 🧠 Tiered system (PSMF + maintenance days) 🛒 Grocery lists + planning tools 👥 3 months of community support

👉 Check it out here + get 20% off with code VANESSA

IQBAR – Try the Ultimate Sampler Pack: IQBARs, IQMIX, and IQJOE! Text VANESSA to 64000 for a 20% off discount code

🔴 Tone Lux Red Light Therapy

Boost collagen, elastin, and recovery

✨ Save 20% with code VANESSA

Discover:

🔬 Tone Device

Vanessa uses the Tone Device as a proxy for fat loss + autophagy on PSMF days

Check it out HERE 👉 Use code VANESSA for 20% off

📚 Free Resource

Get your free high-protein keto guide: 👉 The Keto Reset eBook

👤 Connect with Vanessa

Instagram: @ketogenicgirl

📱 Follow for:

Latest fat loss research
Protein optimization strategies

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⚠️ Disclaimer

This podcast is for informational purposes only and is not medical or nutritional advice. Always consult your healthcare provider before making dietary or lifestyle changes.