What is the normal range for creatinine?

What is the normal range for creatinine?

• A. 2-10 mg/dL
• B. 0.5-1.2 mg/dL
• C. 1.5-2.5 mg/dL
• D. 0-5 mg/dL

Answer: (B)

Creatinine is a waste product from muscle metabolism that the kidneys filter from the blood, so its level reflects how well the kidneys are filtering. Because its production is relatively stable and it is cleared by glomerular filtration, the normal serum creatinine range in healthy adults is about 0.5 to 1.2 mg/dL. Values higher than this suggest reduced kidney function, while lower values are less common and can be seen with very low muscle mass. Factors like muscle mass, age, and sex can shift this range slightly, but 0.5–1.2 mg/dL is the typical normal window.

Creatinine is a waste product from muscle metabolism that the kidneys filter from the blood, so its level reflects how well the kidneys are filtering. Because its production is relatively stable and it is cleared by glomerular filtration, the normal serum creatinine range in healthy adults is about 0.5 to 1.2 mg/dL. Values higher than this suggest reduced kidney function, while lower values are less common and can be seen with very low muscle mass. Factors like muscle mass, age, and sex can shift this range slightly, but 0.5–1.2 mg/dL is the typical normal window.