Are You Losing Muscle Instead of Fat? The Protein Strategy That Protects Lean Mass: Dr. Leigh Breen

When the scale goes down, how much of that weight is actually body fat—and how much could be metabolically active muscle?

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In today's episode of the Optimal Protein Podcast, Vanessa welcomes leading protein and muscle researcher Dr. Leigh Breen back to discuss how to protect lean mass during weight loss.

They examine an important concern surrounding traditional dieting and GLP-1-assisted weight loss: people may lose muscle alongside body fat, yet regain predominantly fat afterward. Could repeated cycles of weight loss and regain ultimately leave someone with worse body composition?

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Vanessa and Dr. Breen also explore how much protein we may actually need, whey versus plant protein, anabolic resistance, the importance of leucine, and why breakfast may be the biggest missed opportunity for protein.

They also discuss his fascinating "prehabilitation" research showing how one resistance-training session helped protect older adults' muscle during five days of bed rest.

In this episode, they discuss:

• How much protein may help preserve muscle during weight loss

• Why scale weight cannot reveal whether you are losing fat or muscle

• Muscle loss during GLP-1-assisted weight loss