Testosterone by age, on average.
Drag to any age to see how average total testosterone compares with age 30, and how common low levels become in later decades. Averages describe groups of men; only a blood test gives your own number.
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Population averages, not a prediction for any one person.
Averages are not a diagnosis. Guidelines call for symptoms plus two early-morning blood tests showing total testosterone below 300 ng/dL.
The method, in the open.
The average decline
Testosterone generally declines gradually with age. Cleveland Clinic puts the average drop at about 1% a year after 30, and the long-running Baltimore Longitudinal Study of Aging found the decline in healthy men independent of illness. It also found higher body mass index went with lower total testosterone.
What a diagnosis takes
The American Urological Association uses a total testosterone below 300 ng/dL as a reasonable cut-off, measured on two separate early mornings, together with symptoms or signs. An age, or a single number, is never enough on its own.
What the labs look at
A baseline panel usually covers total and free testosterone, blood counts, a metabolic panel, PSA and estradiol, so a provider sees the whole picture before deciding anything.
The only way to know is a blood test.
Freedom RX starts testosterone treatment with lab work: an at-home kit, a Quest Diagnostics draw at home or near you, or labs you already have from the last 12 months. A licensed provider reads the results alongside your health history and decides whether any treatment is appropriate. Not everyone is approved.
Common questions.
At what age does testosterone start to decline?+
What is a normal testosterone level?+
Does low testosterone always need treatment?+
Is what I enter saved?+
Where the numbers come from.
- Cleveland Clinic, Why Are Testosterone Levels Decreasing? (2022) (opens in a new tab)
- Harman et al., Longitudinal effects of aging on serum total and free testosterone levels in healthy men, Baltimore Longitudinal Study of Aging (2001) (opens in a new tab)
- American Urological Association, Evaluation and Management of Testosterone Deficiency (guideline) (opens in a new tab)
Educational, not medical advice, and not a diagnosis. Results are estimates from published formulas and population data. A licensed provider makes every treatment decision. For a medical emergency, call 911.
Other numbers worth knowing.
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