Kidney
Creatinine: Normal Range and What High Creatinine Means
Creatinine is a waste product your kidneys filter out of the blood. Its level is a common way to check how well your kidneys are working.
Normal Creatinine range
What a high Creatinine means
A high creatinine can mean the kidneys are filtering less effectively. It can also rise temporarily from dehydration, certain medicines, or a very high-protein/creatine intake.
Common causes:
- Dehydration
- Reduced kidney function
- Some medicines
- Very high protein or creatine supplements
- High blood pressure or diabetes over time
What a low Creatinine means
A low creatinine is usually not a concern and can relate to low muscle mass.
Food & lifestyle that help
Favour
- Adequate water (unless a doctor limits fluids)
- Vegetables and fruit
- Balanced, not excessive, protein
Limit
- Excess protein and creatine supplements
- Too much salt
- Processed food (for blood pressure)
When to see a doctor
See a doctor to interpret creatinine together with eGFR and urea, especially if you have diabetes or high blood pressure — early kidney changes are best caught early.
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Make my free plan →Frequently asked questions
What is a normal creatinine level?
Roughly 0.7–1.3 mg/dL for men and 0.6–1.1 mg/dL for women, varying with muscle mass and lab.
Does high creatinine always mean kidney disease?
No. Dehydration, some medicines and high supplement intake can raise it temporarily. Persistent elevation should be evaluated by a doctor.