If you have any medical questions or concerns, please talk to your healthcare provider. The articles on Health Guide are underpinned by peer-reviewed research and information drawn from medical societies and governmental agencies. However, they are not a substitute for professional medical advice, diagnosis, or treatment.
Normal testosterone levels are 300–1,000 ng/dL in men and 15–70 ng/dL in women
Testosterone is a sex hormone that is present in both men and women, but men have higher concentrations of it. Testosterone plays a role in sexual development as well as the growth of muscle mass and body hair. Testosterone also can be converted into the hormones dihydrotestosterone (DHT) and estradiol, a type of estrogen. Testosterone is created in the testicles and in the adrenal glands. Having low testosterone can lead to symptoms such as fatigue, loss of muscle mass, loss of libido, and erectile dysfunction. This is commonly referred to as “low T.” Low T can be treated with testosterone replacement therapy (TRT) or other medications. You can read more about testosterone, here.
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What we mean by normal
In medicine, using the term “normal” can sometimes be off-putting. Saying something is “normal” implies that everything else is “abnormal.” Additionally, saying something is “normal” may not be accurate, since something that is “normal” for you may not be “normal” for somebody else. Therefore, instead of saying certain values are “normal,” alternative terminology may be to say that these values are “healthy” or “within the reference range.”
Additionally, some values have well-defined cutoffs, while others do not. For example, when looking at hemoglobin A1c levels, a value of 6.5 or greater is always diagnostic of diabetes. On the other hand, when looking at testosterone levels, some use cutoffs of 270–1,070 ng/dL while others use cutoffs of 300–1,000 ng/dL.
The information below represents values that are commonly used as cutoffs. However, depending on the specific source you’re looking at or the laboratory you go to, their values may be a little different.