TESTOSTERONE HEALTH
What is considered a “normal” testosterone level for men in their 20s, 30s, and 40s?
For years, a total testosterone level below 300 ng/dL has commonly been used as a threshold when evaluating men for low testosterone (low T) or testosterone deficiency. But is one cutoff appropriate for men of every age?
A study published in The Journal of Urology examined testosterone levels in 1,486 men between the ages of 20 and 44 using data from the National Health and Nutrition Examination Survey (NHANES).
The researchers found that testosterone levels varied considerably by age.
Age-Specific Middle-Tertile Ranges
409–558
Age 20–24
ng/dL
413–575
Age 25–29
ng/dL
359–498
Age 30–34
ng/dL
352–478
Age 35–39
ng/dL
350–473
Age 40–44
ng/dL
These study-derived ranges do not replace individualized diagnosis or clinical evaluation.
Testosterone Levels by Age
The study identified the following middle-tertile testosterone ranges:
- 20–24 years: 409–558 ng/dL
- 25–29 years: 413–575 ng/dL
- 30–34 years: 359–498 ng/dL
- 35–39 years: 352–478 ng/dL
- 40–44 years: 350–473 ng/dL
Based on the study’s methodology, the corresponding lower cutoffs were approximately 409, 413, 359, 352, and 350 ng/dL, respectively.
Why Does This Matter?
A testosterone level of 300 ng/dL may be considered “normal” under a commonly used cutoff, but testosterone levels naturally change with age.
That means evaluating a younger man for testosterone deficiency may require more than simply asking whether his testosterone is above or below 300 ng/dL.
Symptoms, repeat morning testosterone testing, medical history, medications, and other laboratory findings can all be important when evaluating low testosterone and possible hypogonadism.
If you’re experiencing symptoms such as:
- Low energy or persistent fatigue
- Reduced sex drive
- Erectile difficulties
- Decreased muscle mass or strength
- Changes in mood or motivation
- Difficulty maintaining physical performance
…it may be worth discussing your testosterone levels with a qualified healthcare professional.
Important Notice
A single testosterone measurement does not by itself establish a diagnosis of testosterone deficiency. Testosterone levels should be interpreted in the context of symptoms, appropriate testing, and an individual’s overall health.
Research
Travison et al. / The Journal of Urology
“Rethinking the 300 ng/dL Cutoff for Testosterone Deficiency in Men 20–44 Years Old”
Read the study on PubMed: https://pubmed.ncbi.nlm.nih.gov/36282060/
Talk With Valyr Health
At Valyr Health, we provide convenient telemedicine consultations for men who want to better understand their testosterone levels, symptoms, and treatment options, without the hassle of a traditional office visit.
Schedule a telemedicine consultation today to discuss whether testosterone testing or further evaluation may be appropriate for you.
