Also Known As
Total Testosterone Test, Serum Testosterone, Total T Test
What Is a Total Testosterone Blood Test?
A testosterone blood test measures the overall amount of testosterone circulating in a man’s bloodstream. Testosterone is the primary male sex hormone responsible for muscle mass, bone density, libido, energy levels, mood, and red blood cell production.
Testosterone levels naturally peak in early adulthood and decline approximately 1–2% per year after age 30. According to the American Urological Association, low testosterone affects an estimated 2–4 million men in the United States — yet the majority remain undiagnosed because symptoms develop gradually and are often attributed to aging or stress.
What Does the Total Testosterone Test Measure?
This test measures total testosterone — the combined amount of testosterone in your blood, including:
- Bound testosterone — attached to proteins like SHBG (sex hormone binding globulin) and albumin; not immediately available to tissues
- Free testosterone — the small unbound fraction that is biologically active
Total testosterone is the standard first-line test for evaluating testosterone status. If total testosterone is borderline or symptoms persist despite normal total levels, a Free and Total Testosterone test provides a more complete picture.
Normal Testosterone Reference Ranges for Men
| Age | Normal Range (ng/dL) |
|---|---|
| 18–29 | 400–1,080 |
| 30–39 | 350–1,000 |
| 40–49 | 300–950 |
| 50–59 | 280–900 |
| 60–69 | 250–850 |
| 70+ | 200–800 |
The general clinical threshold for low testosterone is below 300 ng/dL. Many men experience symptoms at levels below 400 ng/dL. Always interpret results alongside symptoms and clinical history.
Symptoms of Low Testosterone
- Persistent fatigue and low energy
- Decreased sex drive
- Erectile dysfunction
- Loss of muscle mass and strength
- Increased body fat, especially around the abdomen
- Mood changes — depression, irritability, lack of motivation
- Brain fog and difficulty concentrating
- Reduced bone density
- Decreased body and facial hair
- Poor sleep quality
What Causes Low Testosterone?
- Age-related decline — the most common cause after 30
- Hypogonadism — the testes produce insufficient testosterone
- Obesity — excess fat tissue converts testosterone to estrogen
- Chronic stress — elevated cortisol suppresses testosterone production
- Type 2 diabetes — strongly associated with low testosterone
- Sleep apnea — disrupts the overnight testosterone production cycle
- Certain medications — opioids, steroids, and some antidepressants
- Pituitary disorders — impaired signaling from the pituitary gland
Who Should Get a Total Testosterone Test?
- Men experiencing fatigue, low libido, or erectile dysfunction
- Men with unexplained loss of muscle mass or increased body fat
- Men over 40 wanting a baseline hormone evaluation
- Men with depression or mood changes not responding to treatment
- Men with type 2 diabetes or metabolic syndrome
- Men considering or currently on testosterone replacement therapy (TRT)
- Men with known or suspected hypogonadism
- Athletes monitoring hormone levels
Test Preparation
No fasting required. However, timing matters significantly.
Get tested in the morning: Testosterone levels are highest between 7–10 AM. Afternoon testing can show levels 20–30% lower than morning levels in the same person. Always test in the morning for the most accurate and clinically meaningful result.
Avoid intense exercise the day before your blood draw — heavy training can temporarily affect testosterone levels.
How Much Does a Testosterone Test Cost?
| Where You Get Tested | Typical Cost | Notes |
|---|---|---|
| Personalabs | $39–$59 | Physician order included |
| Doctor’s office visit + lab | $200–$400+ | Office copay + lab fees |
| Endocrinologist visit | $300–$600+ | Specialist fees apply |
| Hospital outpatient lab | $300–$700+ | Facility fees apply |
HSA and FSA eligible. Testosterone testing qualifies as a reimbursable medical expense.
How to Order Your Testosterone Test
Step 1: Order online — your physician-approved lab order is ready within 2–4 hours. Step 2: Find a lab near you using our Lab Locator. Step 3: Get your blood drawn before 10 AM for most accurate results. Step 4: Get results in your secure Personalabs account within 24–48 hours.
Frequently Asked Questions
What is considered low testosterone?
The American Urological Association defines low testosterone as a total level below 300 ng/dL combined with symptoms. However, many men experience significant symptoms at levels between 300–400 ng/dL. Treatment decisions are based on both lab values and symptoms together — not lab values alone.
What is the difference between total and free testosterone?
Total testosterone measures all testosterone in the blood including protein-bound forms. Free testosterone measures only the unbound, biologically active fraction. Some men have normal total testosterone but low free testosterone due to high SHBG levels — meaning less testosterone is actually available to their tissues. If your total testosterone is normal but symptoms persist, a Free and Total Testosterone test is the logical next step.
What time of day should I get a testosterone test?
Always get tested in the morning, ideally between 7–10 AM. Testosterone follows a daily rhythm called a circadian cycle — levels peak in the morning and drop significantly by afternoon. Testing at different times of day can produce dramatically different results, making morning testing the clinical standard.
Can lifestyle changes raise testosterone naturally?
Yes — several lifestyle factors significantly impact testosterone levels. Resistance training and high-intensity exercise boost testosterone. Optimizing sleep (7–9 hours) is critical since most testosterone is produced overnight. Losing excess body fat, reducing chronic stress, and limiting alcohol all support healthy levels. Vitamin D and zinc deficiency are also linked to low testosterone and are worth testing alongside a hormone panel.
Should I test DHEA-S and estradiol at the same time as testosterone?
For a complete male hormone picture, testing testosterone alongside DHEA-S and estradiol is recommended. DHEA-S shows adrenal androgen production, and estradiol reveals whether excess testosterone is converting to estrogen — a common issue in men with obesity or those on TRT. Personalabs offers a Comprehensive Male Hormone Profile that covers all three in a single panel.
Is the testosterone test covered by HSA or FSA?
Yes. The testosterone blood test qualifies as a reimbursable medical expense under HSA and FSA plans.
Related: Top 5 Blood Tests for Men
