The Claim

In rats following semistarvation, the preferential regain of fat mass over lean mass is associated with a 10–13% reduction in total energy expenditure, which is partially explained by a persistent reduction in core body temperature, resulting in a 25–30% reduction in the energy cost of homeothermy.

Source: Low 24-hour core body temperature as a thrifty metabolic trait driving catch-up fat during weight regain after caloric restriction.

What the research says

Supports is higher

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

Supports
16score
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.

How it works
1 study reviewed
In plain English

After periods of severe food restriction, rats regain fat instead of muscle, and this is linked to a 10–13% drop in total energy use, partly due to lower body temperature that reduces the energy needed to maintain warmth by 25–30%.

See the scientific wording

In rats, the preferential regain of fat mass over lean mass after semistarvation is associated with a 10–13% reduction in total energy expenditure, which is partially explained by the persistent reduction in core body temperature, contributing to a 25–30% reduction in the energy cost of homeothermy.

Why this might work

After eating less for a while, the body stays cooler than normal even when eating normally again. This cooler temperature means the body uses less energy to stay warm. The saved energy is not used to build muscle but instead goes into making more fat. This happens because the brain sets a lower target temperature for the body, and muscles become less active and burn less energy, so fat storage becomes the main way to use extra calories.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Low 24-hour core body temperature as a thrifty metabolic trait driving catch-up fat during weight regain after caloric restriction.

    After rats lose weight and start eating normally again, their bodies stay a little cooler than before, and this lower body temperature helps them save energy—so they put on more fat instead of muscle, even when eating the same amount as other rats.

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

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