Cells use a special pump to create a sodium imbalance outside and inside the cell, and that imbalance acts like a battery to help pull creatine into the cell through a specific door called SLC6A8.
Evidence from Studies
Supporting (3)
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Cyclocreatine Transport by SLC6A8, the Creatine Transporter, in HEK293 Cells, a Human Blood-Brain Barrier Model Cell, and CCDSs Patient-Derived Fibroblasts
The study shows that creatine gets into cells using a specific transporter that needs sodium, which supports the idea that sodium levels help drive this process, even though the study didn’t directly test the pump that sets up those sodium levels.
Regulatory effect of insulin on the structure, function and metabolism of Na+/K+-ATPase (Review)
The study shows that the sodium-potassium pump helps maintain a balance of minerals in cells, which is needed for certain nutrients to get in, but it didn’t look directly at how creatine enters cells.
Cooperative Binding of Substrate and Ions Drives Forward Cycling of the Human Creatine Transporter-1
The study shows that the creatine transporter uses the sodium difference across the cell membrane—created by the sodium-potassium pump—to bring creatine into cells, which supports the idea in the claim.
Contradicting (0)
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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.