The Claim
Creatine supplementation does not significantly alter serum creatinine concentrations in competitive swimmers during short-term use.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Taking creatine supplements for a short time does not change the level of creatinine in the blood of competitive swimmers.
See the scientific wording
Creatine supplementation does not significantly alter serum creatinine concentrations in competitive swimmers, indicating no detectable kidney stress or altered renal clearance under short-term use.
When creatine is taken orally, it enters the bloodstream and gets stored in muscles, where it is used to make energy. Some of it naturally turns into creatinine, which the kidneys filter out and send into urine. Even though more creatinine is made and excreted in urine, the amount in the blood stays the same because the kidneys adjust how much they filter to keep blood levels stable.
What the research says
1 studyStudy: Effects of creatine supplementation on the performance and body composition of competitive swimmers.
Taking creatine for a week made swimmers' urine show more creatine and creatinine, but their blood creatinine levels stayed the same — meaning their kidneys weren't stressed or working harder.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.