What is a testosterone test & when do you need one?

Published Jul 18, 2025

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Updated Jul 18, 2025

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Est. reading time: 4 minutes

Key points

  • A testosterone test measures the amount of this hormone in the bloodstream, which plays a role in muscle mass, bone strength, mood regulation, and energy levels.
  • There are different types of testosterone tests, including total testosterone, free testosterone, and bioavailable testosterone tests, each providing different insights.
  • Testosterone tests may be recommended for symptoms such as low sex drive, fatigue, mood swings, irregular periods, or conditions affecting hormone production.
  • Testosterone test results can indicate various health conditions, such as hypogonadism in men, pituitary issues in women, or adrenal disorders in both.

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What is a testosterone test & when do you need one?


Ever wondered what’s going on with your hormones? Whether you’re feeling unusually tired, dealing with unexpected mood changes, or just curious about your health, a testosterone test can offer helpful insights. Testosterone isn’t just about sex drive — it plays a big role in things like muscle mass, bone strength, mood regulation, and even energy levels. While it’s more commonly talked about in men, women have testosterone, too (just in smaller amounts), and imbalances can affect anyone.

In this article, we’ll walk you through what a testosterone test is, the different types, when you might need one, and what your results could mean. Plus, we’ll show you how and where to get tested — no stress, no guesswork.

What does a testosterone test measure?

Testosterone is a hormone primarily produced in the testicles in men and in smaller amounts by the ovaries in women. It also comes from the adrenal glands in both sexes. It’s known for fueling sex drive, but it also helps regulate muscle size, red blood cell production, bone density, and emotional health.

A testosterone test measures how much of this hormone is circulating in your bloodstream. If your levels are too low or too high, it can be a sign that something’s off —like a hormone imbalance, a medical condition, or even a medication effect.

Types of testosterone tests

There isn’t just one testosterone test — there are actually a few different types, depending on what your doctor is looking for. Here’s a quick breakdown:

  • Total testosterone test: This is the most common test and usually the first one your doctor orders. It measures the overall amount of testosterone in your blood, including both the testosterone bound to proteins and the free-floating kind.
  • Free testosterone test: This measures just the “free” testosterone — the kind that isn’t bound to proteins and is active in your body. It’s often ordered if your total testosterone levels are borderline or don’t match your symptoms.
  • Bioavailable testosterone test: This one checks both free testosterone and the kind that’s loosely attached to proteins. It gives a fuller picture of how much usable testosterone is in your body.

Most people start with the total testosterone test, and if the results are unclear, a free or bioavailable test might come next.

Why would you need a testosterone test?

There are lots of reasons someone might need a testosterone test. If you're noticing certain symptoms or have a condition that affects your hormones, your doctor might recommend checking your testosterone levels.

Common signs and symptoms of a testosterone imbalance include:

For men:

  • Low sex drive
  • Fatigue or low-energy
  • Erectile dysfunction
  • Depression or mood swings
  • Decreased muscle mass
  • Hair loss

For women:

  • Irregular periods
  • Unwanted facial or body hair
  • Acne
  • Fertility issues
  • Low libido

Health conditions that may require testing:

  • Pituitary disorders: These affect the gland that controls hormone production.
  • Testicular or ovarian dysfunction: When these organs don’t produce hormones properly.
  • Polycystic ovary syndrome (PCOS): A common hormone disorder in women.
  • Delayed or early puberty: Especially in teens, hormone testing can help figure out what’s going on.
  • Monitoring hormone therapy: If you’re undergoing treatment like testosterone replacement therapy, you’ll need regular testing to track your levels.

How to prepare for a testosterone test

A testosterone test is usually done with a simple blood draw — quick and pretty painless. Here’s how to get ready:

  • Timing matters: Testosterone levels tend to be highest in the morning. That’s why most tests are scheduled between 7 a.m. and 10 a.m.
  • Ask if you need to fast: Sometimes, your doctor might ask you not to eat for a few hours before the test.
  • Skip intense workouts beforehand: Heavy exercise can temporarily raise testosterone levels, so try to take it easy before your test.
  • Tell your doctor about any medications or supplements. Steroids, biotin, or even herbal supplements can affect results.

The whole blood draw process usually takes just a few minutes.

How to understand testosterone test results

So, you got your test results — now what? Let’s break it down. General testosterone level ranges are estimates and can vary slightly depending on the lab:

  • Men: 300 to 1,000 ng/dL (nanograms per deciliter)
  • Women: 15 to 70 ng/dL

What low testosterone could mean:

  • In men: Hypogonadism (underactive testes), chronic illness, obesity, certain medications, or just natural aging.
  • In women: Low testosterone isn’t usually a concern, but extremely low levels might relate to pituitary issues or adrenal insufficiency.

What high testosterone could mean:

  • In men: This could be due to tumors, anabolic steroid use, or adrenal disorders.
  • In women: Might signal PCOS, adrenal gland disorders, or certain tumors.

No matter what your results say, always review them with your healthcare provider. They can help interpret them in context and recommend the next steps.

Where to get a testosterone test

Good news — you’ve got options when it comes to getting tested. Testosterone tests are available at:

  • Urgent care clinics
  • Primary care providers
  • Endocrinologists or hormone specialists
  • Walk-in labs or health centers

If you're not sure where to go, Solv makes it super easy to find and book testosterone tests near you. Many locations offer same-day or next-day appointments.

Book a testosterone test at a clinic near you

If you’re dealing with symptoms like low energy, mood changes, or changes in your sex drive, a testosterone test can help you understand what’s going on inside your body. You don’t need a referral or a big hassle. Just book a test through Solv and get answers — fast. Same-day and next-day appointments are available in many locations.

FAQs

What is a testosterone test and why might someone need one?

A testosterone test measures the amount of testosterone, a hormone that regulates several body functions, in your bloodstream. If your levels are too high or too low, it may indicate a hormone imbalance, a medical condition, or a medication effect. You might need a testosterone test if you're experiencing symptoms such as unusual tiredness, unexpected mood changes, low sex drive, or if you have a condition that affects your hormones.

What are the different types of testosterone tests?

There are three types of testosterone tests: total testosterone test, free testosterone test, and bioavailable testosterone test. The total testosterone test measures the overall amount of testosterone in your blood, while the free testosterone test measures only the testosterone that isn't bound to proteins. The bioavailable testosterone test checks both free testosterone and the kind that's loosely attached to proteins, providing a fuller picture of how much usable testosterone is in your body.

What symptoms might indicate a testosterone imbalance?

For men, symptoms of a testosterone imbalance can include low sex drive, fatigue, erectile dysfunction, depression, mood swings, decreased muscle mass, and hair loss. For women, symptoms can include irregular periods, unwanted facial or body hair, acne, fertility issues, and low libido.

How should one prepare for a testosterone test?

To prepare for a testosterone test, you should schedule the test between 7 a.m. and 10 a.m. as testosterone levels tend to be highest in the morning. You may need to fast for a few hours before the test, and you should avoid intense workouts beforehand as they can temporarily raise testosterone levels. It's also important to tell your doctor about any medications or supplements you're taking as they can affect the results.

How can I interpret the results of a testosterone test?

Testosterone levels are usually measured in nanograms per deciliter (ng/dL). For men, normal levels range from 300 to 1,000 ng/dL, while for women, they range from 15 to 70 ng/dL. Low testosterone levels in men could indicate underactive testes, chronic illness, obesity, certain medications, or natural aging. In women, extremely low levels might relate to pituitary issues or adrenal insufficiency. High testosterone levels in men could be due to tumors, anabolic steroid use, or adrenal disorders, while in women, they might signal PCOS, adrenal gland disorders, or certain tumors. It's important to review your results with your healthcare provider for a proper interpretation and next steps.

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Dr. Linda Halbrook is a Board-Certified Family Medicine physician with over 40 years of experience, dedicated to providing comprehensive care to patients across Texas. She retired from practice but currently serves on the Clinical Services Committee of CommonGood Medical, a non-profit organization serving the uninsured in Collin County. 

How we reviewed this article

Medically reviewed

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3 sources

Solv has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. We avoid using tertiary references.

Topics in this article

Mens HealthLab TestingPrimary CareSexual Health
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