Taking creatine helps your muscle cells soak up more water, making them swell a bit—and this swelling tells your body to stop breaking down muscle as much.
Evidence from Studies
Supporting (2)
Community contributions welcome
Effects of acute creatine monohydrate supplementation on leucine kinetics and mixed-muscle protein synthesis.
This study found that taking creatine helped reduce the breakdown of muscle protein in men, which matches the claim that creatine helps keep muscle from breaking down—even though it didn’t directly measure water inside cells.
Creatine as a compatible osmolyte in muscle cells exposed to hypertonic stress
The study found that creatine helps muscle cells survive when they’re under stress by pulling water inside them, which makes them puff up — just like how adding salt to a cucumber makes it swell. This puffing up may help stop the cells from breaking down muscle protein.
Contradicting (1)
Community contributions welcome
Creatine supplementation has no effect on human muscle protein turnover at rest in the postabsorptive or fed states.
The study gave people creatine supplements and checked if it reduced muscle breakdown — it didn’t. So even though creatine might make muscles look bigger, this study shows it’s not because it swells cells and stops muscle from breaking down.
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.