The Claim

In healthy young women undergoing 60 days of bed rest, nitrogen balance was 2.5 times higher during the first 15 days in those consuming a high-protein, leucine-enriched diet (11.4 g/day leucine) compared to those consuming a conventional diet (4.9 g/day leucine), with no significant difference in nitrogen balance observed after day 15.

Source: Early lean mass sparing effect of high-protein diet with excess leucine during long-term bed rest in women

What the research says

Supports is higher

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

Supports
62score
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.

Quantitative
1 study reviewed
In plain English

In healthy young women confined to bed rest for 60 days, those eating a diet with higher leucine (11.4 grams per day) had 2.5 times higher nitrogen balance in the first 15 days than those eating a standard diet with lower leucine (4.9 grams per day). After day 15, nitrogen balance was similar between the two groups.

See the scientific wording

During 60 days of bed rest in healthy young women, nitrogen balance was 2.5 times higher in the first 15 days among those consuming a high-protein, leucine-enriched diet (11.4 g/day leucine) compared to a conventional diet (4.9 g/day leucine), but no significant difference in nitrogen balance was observed after day 15.

Why this might work

When a person eats a lot of leucine, muscle cells take it in and turn on a signal that tells the cell to build more protein and stop breaking down its own parts. This keeps muscle from falling apart during the first two weeks of not using the muscles. After that, the muscle stops taking in leucine as well, the signal turns off, and muscle breakdown returns to normal.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Early lean mass sparing effect of high-protein diet with excess leucine during long-term bed rest in women

    When women stayed in bed for two months, those who ate extra leucine kept more muscle in the first two weeks, but after that, both groups lost the same amount of muscle. So the extra leucine helped at first, but didn’t keep helping long-term.

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

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