More Protein, More Fat Loss? | Dr. Jose Antonio
Optimal Protein Podcast with Vanessa Spina
Vanessa Spina
4.6 • 795 Ratings
🗓️ 16 March 2026
⏱️ 50 minutes
🧾️ Download transcript
Summary
In this episode of the Optimal Protein Podcast, Vanessa sits down with sports nutrition scientist Dr. Jose Antonio, one of the world's leading researchers on protein metabolism and body composition.
Dr. Antonio is widely known for his groundbreaking protein overfeeding studies, which found that participants consuming extremely high protein diets did not gain body fat — and in some cases actually lost more fat — even while eating more calories.
In this conversation, Vanessa and Dr. Antonio explore the fascinating metabolic reasons why protein behaves differently in the body, including its thermic effect, impact on satiety, and role in preserving lean mass during fat loss.
They also discuss the newly evolving protein recommendations, how protein interacts with carbohydrates and fats in the diet, and why certain athletes may benefit from lower carbohydrate approaches depending on their sport and metabolic demands.
If your goal is fat loss, body recomposition, or maintaining muscle while dieting, this episode offers a deep dive into the science behind why prioritizing protein can be such a powerful strategy.
In This Episode
• Why protein overfeeding studies showed more calories did not lead to fat gain
• The metabolic reasons protein calories behave differently in the body
• How high protein intake supports fat loss and lean muscle preservation
• The science behind the thermic effect of protein
• Why newer protein recommendations are increasing
• How protein, carbohydrates, and fats interact to influence body composition
• Why certain athletes may benefit from lower carbohydrate strategies
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Transcript
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| 0:00.0 | Welcome to the optimal protein podcast. I'm Vanessa Spina. |
| 0:04.4 | Hello, my friends. Welcome back to the optimal protein podcast. I'm your host, Vanessa, and I am so excited about today's episode because we have one of my favorite guest, Dr. Jose Antonio, one of the world's leading researchers in sports nutrition, protein studies, and co-founder |
| 0:24.5 | of the International Society of Sports Nutrition. |
| 0:27.3 | Now, he is widely known for his groundbreaking studies on high protein diets and protein |
| 0:32.9 | overfeeding, research that challenged some of the most persistent beliefs in nutrition, |
| 0:38.3 | including the idea that eating more calories always leads to fat gain. |
| 0:42.9 | In fact, some of his studies found that individuals consuming very high protein diets, |
| 0:48.0 | sometimes over three grams of protein per kilogram of body weight, did not gain fat. |
| 0:53.7 | And in some cases, they actually lost more |
| 0:56.6 | body fat than the other groups, despite eating hundreds of additional calories per day. So in today's |
| 1:03.7 | episode, we are diving into one of the most fascinating areas of nutrition science when it comes |
| 1:09.7 | to fat loss and body composition, the metabolic |
| 1:12.6 | effect of higher protein diets. We talk about the thermic effect of protein, amino acid oxidation, |
| 1:19.7 | satiety, and why high protein diets can be such a powerful strategy for preserving lean mass |
| 1:26.5 | during fat loss. We also talk about protein spraying |
| 1:30.4 | modified fasting days and how incredibly effective those can be for generating fat loss |
| 1:36.5 | while preserving muscle. We even touch on the new updated protein recommendations, how protein intake |
| 1:43.5 | interacts with carbs and fats in the diet, |
| 1:46.2 | and why certain athletes may actually benefit from lower carbohydrate strategies |
| 1:51.1 | depending on their sport and metabolic demands. So if your goal is fat loss, body |
| 1:56.9 | recomposition, preserving muscle while dieting, or optimizing your metabolism, this |
| 2:02.9 | conversation is packed with insights that can help you better understand the science behind |
... |
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