The Claim

In food-deprived rats, the acute increase in skeletal muscle protein synthesis during refeeding (within 20–40 minutes) is associated with elevated insulin levels and a concurrent decline in corticosterone, and both factors are necessary for the rapid restoration of protein synthesis, with corticosterone acting at least partially by inhibiting insulin's anabolic effects.

Source: The role of insulin, corticosterone and other factors in the acute recovery of muscle protein synthesis on refeeding food-deprived rats.

What the research says

Supports is higher

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

Supports
12score
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

In rats that have been deprived of food, muscle protein synthesis increases rapidly during refeeding, and this increase occurs alongside higher insulin and lower corticosterone levels; both hormonal changes are required for this effect, and corticosterone reduces the ability of insulin to stimulate protein synthesis.

See the scientific wording

In food-deprived rats, the acute increase in skeletal muscle protein synthesis during refeeding (within 20–40 minutes) is associated with elevated insulin levels and a concurrent decline in corticosterone, suggesting that both factors are necessary for the rapid restoration of protein synthesis, with corticosterone acting at least partially by inhibiting insulin's anabolic effects.

Why this might work

When a hungry rat eats again, insulin rises and stress hormone levels drop. Insulin turns on a molecular switch in muscle cells that tells the cell to start building more protein. But this switch only works if the stress hormone is low — if the stress hormone is high, it blocks insulin from turning on the switch. A third unknown factor is also needed to fully restore protein building.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: The role of insulin, corticosterone and other factors in the acute recovery of muscle protein synthesis on refeeding food-deprived rats.

    When hungry rats eat again, their muscles start rebuilding faster — but only if insulin goes up and stress hormones go down. The study shows that if you block insulin or raise stress hormones, this fast rebuilding stops, proving that both hormones are needed and that stress hormones block insulin’s muscle-building power.

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

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