The Claim

Under conditions of severe energy deficit at high altitude, the magnitude of fat mass loss (3.6 ± 1.3 kg) is comparable to the magnitude of fat-free mass loss (3.6 ± 2.4 kg) in healthy adult males.

Source: Severe negative energy balance during 21 d at high altitude decreases fat‐free mass regardless of dietary protein intake: a randomized controlled trial

What the research says

Supports is higher

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

Supports
46score
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.

Description
1 study reviewed
In plain English

When healthy adult males experience extreme calorie restriction at high altitudes, they lose about the same amount of body fat as they do muscle and other lean tissues.

See the scientific wording

Under severe energy deficit at high altitude, fat mass loss (3.6 ± 1.3 kg) is similar in magnitude to fat-free mass loss (3.6 ± 2.4 kg) in healthy adult males, indicating that both tissue compartments are substantially depleted under these conditions.

What the research says

1 study

  1. Study: Severe negative energy balance during 21 d at high altitude decreases fat‐free mass regardless of dietary protein intake: a randomized controlled trial

    When men stayed at high altitude and ate much less than usual, they lost about the same amount of fat and muscle—meaning their bodies broke down both types of tissue to get energy.

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

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