Serum iron measures the amount of iron circulating in your blood at the time of testing. In functional medicine, we recognize that serum iron alone provides limited information about iron status, as it fluctuates throughout the day and is affected by recent iron intake, inflammation, and diurnal variation. However, when combined with other iron studies, it helps assess iron metabolism...
Serum iron measures the amount of iron circulating in your blood at the time of testing. In functional medicine, we recognize that serum iron alone provides limited information about iron status, as it fluctuates throughout the day and is affected by recent iron intake, inflammation, and diurnal variation. However, when combined with other iron studies, it helps assess iron metabolism and transport. Iron is essential for oxygen transport, energy production, DNA synthesis, and immune function. Optimal serum iron levels support cellular energy production and prevent both deficiency and overload states.
Serum iron reflects the iron currently available for transport and utilization. It must be interpreted alongside other iron markers for accurate assessment of iron status.
Reference ranges may vary slightly between laboratories. The values below represent commonly accepted clinical ranges.
Ranges shown are general guidelines. Consult your provider for personalized interpretation.
| Biomarker | Reference range | Interpretation |
|---|---|---|
Iron, Total (Male — Optimal) | 85–130 mcg/dL | Target range for optimal health |
Iron, Total (Female — Optimal) | 85–130 mcg/dL | Target range for optimal health |
Iron, Total (Male — Standard) | 50–180 mcg/dL | Standard lab reference range |
Iron, Total (Female — Standard) | 50–180 mcg/dL | Standard lab reference range |
High Iron, Total levels above the standard range may indicate an underlying health condition that warrants further evaluation.
Low Iron, Total levels below the standard range may indicate an underlying health condition that warrants further evaluation.
Serum iron reflects the iron currently available for transport and utilization. It must be interpreted alongside other iron markers for accurate assessment of iron status.
Optimal range men: 85–130 mcg/dL; women: 85–130 mcg/dL. Standard range men: 50–180 mcg/dL; women: 50–180 mcg/dL. Always interpret ranges in clinical context, not as a stand-alone diagnosis.
Serum iron measures the amount of iron circulating in your blood at the time of testing. In functional medicine, we recognize that serum iron alone provides limited information about iron status, as it fluctuates throughout the day and is affected by recent iron intake, inflammation, and diurnal variation. However, when combined with other iron studies, it helps assess iron metabolism and transport. Iron is essential for oxygen transport, energy production, DNA synthesis, and immune function. Optimal serum iron levels support cellular energy production and prevent both deficiency and overload states.
Low iron: fatigue, weakness, pale skin, shortness of breath, cold extremities, decreased cognitive function. High iron: joint pain, fatigue, abdominal discomfort, skin bronzing (with overload).
Low serum iron: iron deficiency, chronic disease, inflammation, poor absorption, blood loss, pregnancy. High serum iron: iron overload, hemochromatosis, liver disease, iron supplementation, recent iron-rich meal.
Iron, Total can be ordered through Vitals Vault without a doctor referral, then completed at CLIA-certified Quest Diagnostics locations nationwide. After checkout, you receive clear draw instructions, digital requisition details, and a structured report that explains whether your result is in standard range, optimal range, or needs follow-up review.
Start by identifying the root cause, then use targeted nutrition, training, sleep, stress, and follow-up retesting to verify improvement. Iron, Total should be optimized with a personalized plan, not guesswork.
You should speak with a clinician if Iron, Total is significantly outside the reference range, trending in the wrong direction across repeat tests, or accompanied by symptoms like fatigue, chest discomfort, dizziness, weight change, or persistent inflammation signs. Immediate medical care is important for severe symptoms, not just abnormal numbers in isolation.
A practical retesting cadence for Iron, Total is every 8 to 12 weeks after major lifestyle, nutrition, or medication changes, and every 3 to 6 months for stable long-term tracking. Faster cadence is useful when values are clearly abnormal, while maintenance cadence helps confirm durability once results stabilize.
You can compare Essential ($99), Advanced ($199), and Max ($399) plans during checkout to confirm Iron, Total inclusion before purchasing. If Iron, Total is not in your selected tier, you can upgrade plans or add targeted testing so your panel matches your goals, symptoms, and retesting strategy.
Iron, Total is included in our comprehensive biomarker panels, processed at CLIA-certified Quest Diagnostics locations nationwide.
Foundation for a full basic health picture.
Deeper metabolic and nutritional insights.
Comprehensive testing for lifelong health.
Medical Disclaimer: This content is for educational and informational purposes only. It is not intended as medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions about a medical condition or treatment. Do not disregard professional medical advice or delay seeking it because of information presented here.