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Optimal Protein Podcast with Vanessa Spina

Secrets of Popular Diets: Fasting Mimicking Diet (FMD) — Calories, Macros & the High-Protein Advantage for Fat Loss & Muscle

Optimal Protein Podcast with Vanessa Spina

Vanessa Spina

Nutrition, Fitness, Health & Fitness

4.6795 Ratings

🗓️ 3 April 2026

⏱️ 47 minutes

🧾️ Download transcript

Summary

In this episode, Vanessa breaks down the fasting mimicking diet (FMD) — including the exact calories, macros, and protein intake used in the research — and compares it to higher-protein fat loss approaches like protein-sparing modified fasting (PSMF) days.

📩 Join the waitlist for Vanessa's upcoming Protein-Sparing Modified Fasting Library and receive the special LAUNCH DISCOUNT! Join HERE

You'll learn what the science actually shows about fat loss, lean mass preservation, and autophagy, and why emerging human data suggests that energy restriction — not protein suppression — may be the primary driver of many fasting-related benefits.

This episode challenges the idea that protein and mTOR are "anti-longevity" and explores a more nuanced, evidence-based approach — especially for women focused on body recomposition, fat loss, and metabolic health.

🧠 In This Episode:

  • The exact calories and macros of the fasting mimicking diet (FMD)

  • What the 2017 FMD study actually showed

  • Why lean mass loss can occur on low-protein approaches

  • New 2025 human research on autophagy and protein intake

  • Why energy deficit — not fasting frequency — drives fat loss

  • What alternate-day fasting research shows about body composition

  • The role of protein in preserving muscle during fat loss

  • Why mTOR is not the enemy

  • The high-protein advantage for fat loss and muscle retention

📚 Studies & References

Fasting Mimicking Diet (FMD):

  • Wei et al., Science Translational Medicine (2017)

  • Brandhorst & Longo, Cell Metabolism (2019)

Autophagy & Protein Intake:

  • Burns et al., Clinical Nutrition (2025)

Alternate Day Fasting & Energy Restriction:

  • Trepanowski et al., JAMA Internal Medicine (2017)

  • Varady et al., Obesity Reviews (2013)

  • Diaz-Garrido et al., Nutrients (2026)

Protein & Lean Mass Preservation:

  • Morton et al., British Journal of Sports Medicine (2018)

  • Helms et al., JISSN (2014)

Note: The 2026 publication referenced is a review paper. Body composition outcomes discussed reflect findings from the broader alternate-day fasting literature.

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📩 Join the waitlist for Vanessa's upcoming Protein-Sparing Modified Fasting Library and receive the special LAUNCH DISCOUNT! Join HERE

Vanessa discusses how using the Tone Device is a proxy for fat loss and autophay on Protein Sparing Modified Fasting (PSMF) days! 👉 Use code VANESSA for 20% off HERE

Get my free NEW high-protein keto guide: The Keto Reset eBook

👤 Connect with Vanessa:

• Instagram: @ketogenicgirl

📱 Follow @ketogenicgirl for the latest studies and strategies on fat loss and protein optimization

📸 Follow @optimalproteinpodcast for episode visuals and updates

💬 Join the Facebook group: Optimal Protein Podcast Community

🎙 The content in this podcast is for informational purposes only and not nutritional or medical advice. Always consult your healthcare provider before making major dietary or lifestyle changes.

Transcript

Click on a timestamp to play from that location

0:00.0

Welcome to the Optimal Protein Podcast. I'm Vanessa Spina.

0:05.2

Hello, my friends. Welcome back to the podcast. I am so excited for today's episode because we are doing a super special topic, which is unpacking the secrets behind certain diets that have been popular in the last year.

0:19.5

We're going to be sharing the secrets,

0:22.7

the calories, the macros, the protein grams, the exact protocols in some of these very

0:28.6

popular diets. Now, the one that we are breaking down and unpacking today is known as the

0:33.6

fasting mimicking diet or FMD, and it is based on some research around autophagy.

0:41.3

And we're going to also compare and contrast it with something that is a higher protein approach

0:48.3

to protect muscle and lean mass. So I've always been curious about all these different diet protocols,

0:54.9

like what exactly are they consuming every day? How many calories? How many grams of protein?

1:00.2

How many grams of carbs and fats? And to put it into context and then compare it to a higher

1:06.8

protein approach based on the latest research showing what is most protective for muscles. So I can't

1:13.2

wait to dig into it today. I did some research on what exactly is involved in this fasting,

1:18.5

mimicking diet, all based on the currently available information in the public common space of

1:26.7

research. So I'm really excited to dig into it all.

1:29.9

I'm also going to share a brand new update about the protein spraying modified fasting

1:34.8

library and a big new development actually that I am super excited about.

1:39.6

And I'm going to update you all on that as soon as we start the episode.

1:43.4

So if you want to skip past

1:44.9

that and get right into today's content on the secrets behind these different protocols,

1:51.1

then I will timestamp that as well for you all. So I can't wait to get into today's episode.

1:55.2

We're going to jump right in after this quick break. Well, welcome, welcome, welcome, welcome, my friends. It's Friday and it's Easter Friday,

2:06.2

a very special holy holiday for many people out there. So I'm wishing you all a happy Easter

...

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