Creatinine and Muscle Mass
High creatinine levels can be common among athletes and those who lift weights, often due to increased muscle mass and creatine intake. Concerns about kidney function should be addressed with tests like cyostatin C, which are not influenced by muscle factors. Additionally, creatine kinase levels can spike significantly after exercise, indicating muscle damage, but these fluctuations are typical for active individuals.In this clip
From this podcast

Perform with Dr. Andy Galpin
How to Use & Interpret Blood Tests for High Performance
Related Questions
I have a question about this episode How to Use & Interpret Blood Tests for High Performance and this Creatinine and Muscle Mass. I got my bloodwork back, and my creatinine was above the normal range. I take 5g of creatine every other day at most and eat a primarily animal-based diet. Is it okay to be a little above the normal range? The doctor said to lay off the creatine. Are the normal range levels based on a national average or that of a healthy individual? Can you clarify?
Are high creatinine levels common among bodybuilders, as discussed in the episode How to Use & Interpret Blood Tests for High Performance and the clip Creatinine and Muscle Mass?
What are normal creatinine levels?