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assertion
Analysis v1

Eating more protein makes your muscles bigger, and bigger muscles burn more calories all day—even if digestion doesn’t.

Evidence from Studies

Supporting (0)

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No supporting evidence found

Contradicting (2)

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59

Presence or absence of carbohydrates and the proportion of fat in a high-protein diet affect appetite suppression but not energy expenditure in normal-weight human subjects fed in energy balance

Randomized Controlled Trial
Human
2010 Nov

The study found that eating more protein burns more calories, but it didn’t check if that’s because muscles are growing — so we don’t know if the claim about muscle growth being the main reason is true.

56

Effects of Varying Protein Amounts and Types on Diet-Induced Thermogenesis: A Systematic Review and Meta-Analysis

Systematic Review With Meta-Analysis
Human
2024 Dec

This study found that eating more protein burns more calories mainly because your body works harder to digest it, not because you build more muscle. The claim says muscle growth is the main reason, but the study didn’t even measure muscle growth.

Similar Assertions

Increased total daily energy expenditure from high-protein diets is mediated by elevated fat-free mass resulting from enhanced muscle protein synthesis, not by sustained diet-induced thermogenesis.

0
56
96%

Chronic elevation of protein intake beyond the threshold required for maximal muscle protein synthesis does not sustainably increase diet-induced thermogenesis or total daily energy expenditure.

58
65
90%

Chronic elevation of protein intake above optimal levels for muscle synthesis does not sustainably increase diet-induced thermogenesis, despite acute thermogenic effects.

56
60
87%

Even though eating more protein every day makes you burn more calories at rest, it doesn’t make you burn more calories after meals over the long term—your body gets used to it.

56
0
81%

Eating a meal with more protein makes your body burn more calories right after eating — but only if you’re not overweight; if you are, this calorie-burning boost doesn’t happen.

56
0
81%

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