Normal testosterone levels vary significantly depending on age and are typically higher in younger men and gradually decline with age. While there isn't a universally agreed-upon "normal" range, several studies and medical resources provide reference ranges. These ranges are often expressed in nanograms per deciliter (ng/dL) or nanomoles per liter (nmol/L). It's crucial to remember that these are just ranges, and individual variations exist. Always consult a doctor for interpretation of your specific results.
Normal Testosterone Ranges by Age Group (ng/dL):
Several sources provide different ranges, highlighting the variability in measurement and interpretation. Here are some examples based on the provided references:
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Ages 20-39: Various studies show a range between 352-575 ng/dL. One study shows age-specific middle tertile levels: 409-558 ng/dL (20-24 years), 413-575 ng/dL (25-29 years), 359-498 ng/dL (30-34 years), 352-478 ng/dL (35-39 years). [Source: Multiple studies cited in references]
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Ages 40-49: 252-916 ng/dL [Source: LabCorp, multiple references]
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Ages 50-59: 215-878 ng/dL [Source: LabCorp, multiple references]
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Ages 60-69: 196-859 ng/dL [Source: LabCorp, multiple references]
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Ages 70-79: 156-819 ng/dL [Source: LabCorp, multiple references]
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Adult Men (General): A common general range cited is 8.7–29 nmol/L (250–836 ng/dL). [Source: Medichecks] Other sources cite broader ranges, such as 300-1000 ng/dL. [Source: Mount Sinai]
Important Considerations:
- Laboratory Variations: Results can vary based on the specific laboratory and assay used.
- Individual Variation: These ranges represent averages; individual levels can fall outside these ranges and still be considered normal.
- Underlying Health: Underlying health conditions can significantly impact testosterone levels.
- Medical Advice: Always consult a healthcare professional for accurate interpretation of your results and any concerns about your testosterone levels.
