The Claim

Do obese people have lower metabolism after eating than lean people?

Source: Thermic response to isoenergetic protein, carbohydrate or fat meals in lean and obese subjects.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
37score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Correlation
1 study reviewed
In plain English

Obese and lean people burn about the same number of extra calories after eating the same amount of food, no matter if it’s protein, carbs, or fat.

See the scientific wording

There is no significant difference in the magnitude of dietary-induced thermogenesis between lean and obese adults following isoenergetic protein, carbohydrate, or fat meals.

What the research says

1 study

  1. Study: Thermic response to isoenergetic protein, carbohydrate or fat meals in lean and obese subjects.

    The study found that whether someone is lean or obese, their body burns about the same amount of calories after eating the same amount of protein, carbs, or fat — so the claim that there’s no big difference is correct.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.