Medically Reviewed By: Dr. Eric Fete
By Dr. Eric Fete, The Fitness Physician & Muscle Doc, VOTED 2024 TOP 15 MOST INFLUENTIAL HEALTH EXPERT BY MSN, Cellular Medicine pioneer, Certified Bioidentical Hormone Optimization & testosterone & weight loss expert and founder of drericprimex.com & primexweightloss.com [Available live in Ohio or online tele-medicine nationwide]. The Dr Eric Primex Nutrition product line is available at drericprimex.com
Testosterone is often associated with muscle, strength, and male health, but it plays an important role in both men and women. As we age, testosterone levels naturally change. But when does a lower testosterone level become too low?
The answer isn't based on one number alone. Testosterone levels need to be interpreted alongside your age, symptoms, health history, medications, and the timing and conditions of the blood test.
What Is Considered Low Testosterone?
For adult men, many clinical guidelines use 300 ng/dL as a general threshold for considering testosterone levels low. However, a diagnosis of testosterone deficiency typically requires both consistently low testosterone levels and symptoms associated with low testosterone.
In other words, one borderline blood test doesn't necessarily mean you have low testosterone.
Testosterone levels also fluctuate throughout the day. They are generally highest in the morning, which is why healthcare professionals commonly recommend an early-morning blood test. If a result is unexpectedly low, testing may be repeated to confirm the finding.
What Are the Signs of Low Testosterone?
Low testosterone can affect the body in several different ways. Some common symptoms include:
However, these symptoms aren't specific to testosterone deficiency. Poor sleep, stress, depression, obesity, certain medications, thyroid problems, and other health conditions can cause similar symptoms.
That's why it's important to look at the whole picture, rather than assuming every symptom is caused by testosterone.
Does Testosterone Naturally Decline With Age?
Yes. Testosterone production generally declines gradually as men get older. But aging doesn't automatically mean that testosterone replacement therapy is appropriate or necessary.
Some men maintain testosterone levels within a healthy range well into older age, while others may develop clinically significant testosterone deficiency.
Lifestyle can also influence testosterone levels. Maintaining a healthy weight, getting adequate sleep, exercising regularly, managing stress, and limiting excessive alcohol consumption can all support overall hormonal health.
What About Women?
Women produce testosterone too, although at much lower levels than men. Testosterone contributes to sexual desire, muscle function, bone health, and overall well-being.
There isn't one universally accepted blood-test cutoff that defines testosterone deficiency in women in the same way there is for men. Testosterone levels also vary depending on age, menstrual status, medications, and other factors.
For women experiencing symptoms such as low sexual desire, fatigue, or changes in body composition, testosterone is only one possible factor to consider.
When Should You Talk to Your Doctor?
If you're experiencing persistent symptoms that could be related to low testosterone, it's worth discussing them with a healthcare professional.
Rather than asking only, “Is my testosterone too low?”, a better question is:
“Do my testosterone levels, symptoms, and overall health suggest that something needs to be addressed?”
Your healthcare professional may recommend repeat testosterone testing and, depending on your situation, additional tests to investigate possible causes.
It's also important not to start testosterone therapy based solely on an online test or a single laboratory result. Testosterone treatment can have benefits for appropriately diagnosed patients, but it also has potential risks and isn't right for everyone.
There isn't one testosterone number that tells the entire story. For men, consistently low morning testosterone—often below approximately 300 ng/dL—combined with relevant symptoms may indicate testosterone deficiency and warrants medical evaluation.
Your number is important, but your symptoms, health history, and repeated test results matter too.
If you suspect your testosterone is low, don't guess. Get properly evaluated and work with a qualified healthcare professional to understand what your results actually mean.
If you're experiencing persistent symptoms that could be related to declining hormone levels, talk with a qualified healthcare provider. A thorough evaluation can determine whether hormone therapy is appropriate and help you develop a personalized plan designed to support your long-term health.
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Dr. Eric Fete, DO is the founder of PrimeX, a preventive health, age management, and peak performance company that provides nutrition products, educational materials, physician grade supplements, hormone therapy and personalized health plans for maximum health, vitality, performance, and wellness.
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