Analysis Version
v1
History
Back
mechanistic
Analysis v1
Contested

Insulin helps your muscles take in more creatine by making blood flow better and boosting a pump-like system in muscle cells, which helps bring in more nutrients.

11
Pro
12
Against

Evidence from Studies

Supporting (3)

11

Community contributions welcome

6

Insulin induces translocation of the alpha 2 and beta 1 subunits of the Na+/K(+)-ATPase from intracellular compartments to the plasma membrane in mammalian skeletal muscle.

Cohort Study
Animal

The study shows that insulin makes muscle cells move more sodium pumps to their surface, which helps create a better environment for nutrients to enter — this matches the idea in the claim that insulin helps deliver nutrients like creatine by boosting these pumps.

3

The mechanism of insulin stimulation of (Na+,K+)-ATPase transport activity in muscle.

Cross-Sectional Study
In Vitro

Insulin makes muscle cells take in more sodium, which turns on a pump (Na⁺/K⁺-ATPase) that helps move nutrients like creatine into the muscle. This study shows exactly how that pump gets turned on by insulin.

1

Regulatory effect of insulin on the structure, function and metabolism of Na+/K+-ATPase (Review)

Narrative Review
2021 Nov

This study shows that insulin makes a cellular pump (Na⁺/K⁺-ATPase) work better, which is exactly what the claim says happens. Better pump function helps muscles take in more nutrients like creatine, so the study supports the claim.

Contradicting (2)

12

Community contributions welcome

32

Carbohydrate ingestion augments creatine retention during creatine feeding in humans.

Cohort Study
Human
1996 Oct

The study found that eating sugar with creatine helps your body keep more creatine, probably because sugar makes your body release insulin. But it didn’t check if insulin works by boosting pumps in muscles or increasing blood flow, so we can’t say the claim’s explanation is right.

12

Creatine uptake in isolated soleus muscle: kinetics and dependence on sodium, but not on insulin.

Cohort Study
Animal
1999 Jun

The study checked if insulin helps muscles absorb more creatine, and found it doesn’t — even though the claim says it does. So the study says the claim is wrong.

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Similar Assertions

When insulin is present, it tells muscle cells to pump more sodium and potassium around, which creates a better environment for the cell to pull in more creatine — a compound that helps muscles store energy.

6
13
91%

When you eat, your body releases insulin, which helps muscle cells pull more potassium from your blood by putting more pumps on their surface—this keeps your muscles working smoothly after meals.

1
0
84%

When rats are given insulin, a specific part of a pump in their muscle cells moves from inside the cell to the outer membrane, but another similar part stays where it is.

6
0
78%

When insulin is added to rat leg muscle, it makes the muscle’s sodium-potassium pump work 23% harder, which lowers the sodium inside the cells by 27%—but it doesn’t create more pumps to do this job.

13
0
77%

When insulin is present in rat muscle cells, it makes a special pump work harder to move salt in and out of the cells—but if you block certain cleanup enzymes in the cell, the pump doesn’t speed up anymore, which suggests insulin uses those enzymes to turn the pump on.

6
0
76%

Related Content