Creatinine · low result
What does a low Creatinine mean?
Short answer
A low creatinine usually reflects low muscle mass — older age, small frame, prolonged illness or malnutrition — and occasionally pregnancy (higher filtration), liver disease or a very low-protein diet. It is rarely a kidney problem in itself; it does make creatinine-based eGFR overestimate kidney function, which is where cystatin C helps.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
What is the normal range for Creatinine?
- Male, age 18+: 0.740 – 1.35 mg/dL
- Female, age 18+: 0.590 – 1.04 mg/dL
Can reflect low muscle mass, pregnancy, or, in rare cases, severe muscle wasting.
Full reference table, citations and testing options: Creatinine biomarker page.
What are the common causes of low Creatinine?
- Low muscle mass: older adults, small body size, muscle-wasting conditions
- Pregnancy
- Liver disease, malnutrition, vegetarian diets
- Overhydration (dilution)
What symptoms go with low Creatinine?
- None from the creatinine itself
What do clinicians usually check next?
- Usually none; consider cystatin C if accurate kidney function matters
- Nutrition and muscle assessment if unexpected
How do you recheck Creatinine?
Prices are cash-pay; every order adds one $6 lab processing fee. Physician authorization is included; no insurance or referral needed.
| Test or panel | Type | Price | Fasting | Results |
|---|---|---|---|---|
| Basic Metabolic Panel | Test · 8 biomarkers | $20.99 | Yes | 1–3 business days |
Common questions
Is low creatinine dangerous?
No. It's a marker of low muscle mass rather than disease, though it can make kidney function look better than it is.
Sources
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.