- Infants and children:
- 0 to 5 months: 75-400 ng/dL
- 6 months to 9 years: <7-20 ng/dL
- 10 to 11 years: <7-130 ng/dL
- Adolescents:
- 12 to 13 years: <7-800 ng/dL
- 14 years: <7-1,200 ng/dL
- 15 to 16 years: 100-1,200 ng/dL
- Adults:
- 17 to 18 years: 300-1,200 ng/dL
- 19 years and older: 240-950 ng/dL
It’s important to note that the optimal range can differ depending on the lab that analyzes the blood sample, so always refer to the reference range provided by the specific laboratory that processed your test.
Additionally, there are many factors that can influence testosterone levels, including:
- Time of day: Testosterone levels are typically highest in the morning and decrease throughout the day.
- Age: Testosterone levels naturally decrease with age, especially after age 30 or 40.
- Health conditions: Certain medical conditions and treatments can affect testosterone levels.
- Lifestyle factors: Diet, exercise, stress, and sleep can influence levels.
If you or someone you know is concerned about testosterone levels, it’s essential to discuss the results and any potential symptoms with a healthcare provider. They can provide guidance on whether treatment or further evaluation is necessary.