The Science of Losing Fat Without Losing Muscle: Dr. Sara Oikawa — Optimal Protein Podcast with Vanessa Spina

Dr. Sara Oikawa joins Vanessa to break down the science of protein, body recomposition, muscle preservation, and protein quality .

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They discuss a fascinating study in which young men followed a 40% calorie deficit while completing intensive resistance and interval training. The group consuming 2.4 g/kg of protein actually gained lean mass while losing fat , while the lower-protein group maintained lean mass.

Sara also shares research showing how quickly muscle can be lost during severe inactivity, why protein cannot fully replace the stimulus of muscle contraction, and why high-quality protein becomes especially important during recovery .

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They also compare whey protein isolate versus collagen , including research showing that collagen does not stimulate muscle protein synthesis like a complete, high-quality protein source.

In this episode:

Can you build muscle while losing fat?
How much protein helps preserve lean mass in a calorie deficit?
Why resistance training is critical during fat loss
What happens to muscle during periods of inactivity
Whey protein versus collagen for muscle protein synthesis
Why protein quality and essential amino acids matter
Aging, energy availability, and muscle loss
How protein and exercise can support recovery from surgery

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.

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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 or exercise regimen.