At-Home Testosterone Test 101: How Thrive's Tasso Kit Works

You know the feeling. The 2 p.m. slump hits harder than it used to. Recovering from a workout takes an extra day. Your drive isn't what it was five years ago. You've wondered whether testosterone is part of the story, but getting a lab order, taking a morning off work, and sitting in a waiting room to get stuck with a needle keeps losing out to everything else on your calendar.

You don't have to wait for a free morning anymore. Thrive's at-home testosterone test lets you collect your own blood sample in just a few minutes. Here's how it works, what we measure, and what happens once your results land.

What is an at-home testosterone test?

It's the same blood test you'd get at a lab. You just collect the sample yourself and mail it in. The lab runs the same measurements either way. You get to skip the drive and the waiting room, and collect on your own schedule.

At Thrive, you'll use it in one of two ways:

• Know Your Numbers. A standalone hormone panel for anyone who wants real answers. A Thrive physician reviews your results no matter what they show. If you have low testosterone, you'll be prompted to schedule a virtual consult with a Thrive physician. If you don't, your physician lets you know, and that's it. No strings attached.
• Ongoing TRT monitoring. If you start treatment, at-home kits make your follow-up labs easy.

Meet Tasso

Thrive's kit uses the Tasso+, a small, single-use device that sticks to your upper arm. You only need one per test. Press the button, and a tiny lancet makes a quick puncture while a gentle vacuum pulls blood into an attached tube. You'll feel a quick pinch, but no one has to hunt for a vein, and there's no squeezing your fingertip for drops.

Why it's worth your trust:

• It's FDA-cleared. The Tasso+ earned FDA 510(k) clearance as a Class II medical device in 2022.
• It's easier than a needle. Tasso calls it virtually painless, and the research agrees. In a 2026 study, people rated Tasso+ collection 0.2 out of 10 for pain. A standard blood draw scored 2.24.
• Researchers rely on it. Clinical trials and university studies use Tasso to collect samples for everything from liver function to cholesterol to hormones.

Is an at-home testosterone test accurate?

Fair question. Accuracy comes down to three things: how the sample is collected, who runs it, and who reads it.

The sample. Tasso collects liquid blood into a standard collection tube, so the lab can process it much like a traditional draw. Studies comparing Tasso samples with blood drawn from a vein have found strong agreement across a range of common lab markers, testosterone included. The biggest variable is you, so follow the instructions step by step.

The lab. Your sample goes to Clinical Reference Laboratory (CRL), a CLIA-certified lab accredited by the College of American Pathologists. In plain terms, it meets federal quality standards and gets inspected regularly.

The person reading it. One number never tells the whole story. Testosterone rises and falls over the course of the day, which is why timing matters so much. Your Thrive physician looks at your results alongside your symptoms and health history, not as a number on its own.

What we measure

Testosterone doesn't work alone, so we don't test it alone. Your initial hormone panel includes:

• Total testosterone. All the testosterone in your blood, bound and unbound. It's the main number doctors use to evaluate low T.
• Free testosterone. The unbound portion your body can put to work right away.
• SHBG (sex hormone-binding globulin). A protein that latches onto testosterone. Too much or too little changes how much testosterone you can actually use.
• Albumin. A common blood protein that also carries some testosterone. Along with SHBG, it affects how much free testosterone is available to your body.
• Estradiol. A form of estrogen. Men need some, and keeping it balanced matters, especially on TRT.
• LH (luteinizing hormone). The signal your brain sends telling your body to make testosterone. It helps your physician figure out why your levels might be low.
• TSH (thyroid-stimulating hormone). A check on your thyroid. Thyroid issues can cause symptoms like fatigue and low energy that overlap with low T, so it helps your physician see the full picture.
• Hemoglobin and hematocrit. Measures of your red blood cells. Testosterone therapy can push them up, so we keep an eye on them.
• PSA (prostate-specific antigen). A prostate health marker that's checked before and during testosterone therapy.
• GGT (gamma-glutamyl transferase). A liver enzyme that gives your physician a read on your liver health.

How to use your Tasso kit

Your kit comes with its own step-by-step instructions. Read them all the way through before you start, and if anything here differs, go with your kit. Here's the general flow, plus a few tips straight from Tasso.

Set yourself up

• Test in the morning, before breakfast. Plan to collect around 8 a.m., before you've eaten. Testosterone usually peaks early in the day, so that's when your sample gives your physician the clearest picture. Water is fine, and it actually helps (more on that next).
• Drink up. Tasso recommends 8 to 16 ounces of water about 30 minutes beforehand.
• Move your arms. A few arm circles right before you start help get blood flowing.

Collect your sample

1. Warm it up. Warm the outside of your upper arm for a few minutes to get blood flowing. A warm compress works, or use a heat pack if your kit includes one. Then clean the spot as your kit directs and let it dry.
2. Stick it on. Peel off the adhesive backing and press the device firmly onto your arm.
3. Press the button. Let your arm hang loose and relaxed at your side while the tube fills.
4. Watch the line. Stop when the blood reaches the top fill line. That usually takes a few minutes. Don't go past 5 minutes, even if the tube isn't full. If it doesn't reach the line, don't ship it. Contact your care team for a new kit.
5. Wrap up. Peel off the device, put on a bandage, and cap the tube as directed.
6. Ship it. Once your tube is filled to the line, pack up your sample and send it back to the lab as your kit directs.

After you send it

Once the lab has your sample, your results go to your Thrive physician.

What comes next depends on your numbers:

• Low testosterone? You'll be prompted to schedule a virtual consult with a Thrive physician to talk through your results, your symptoms, and whether treatment is right for you.
• Levels look healthy? Your physician still reviews everything and will let you know. If you're still feeling off, take a look at the everyday habits that can quietly drag testosterone down. Sometimes the fix starts there.

Testing during treatment

If you start TRT with Thrive, regular labs are how your physician keeps treatment safe and on target. Here's the schedule:

• Before you start
• At 1 month
• At 180 days
• Every 180 days after that

Rather go in person?

No problem. You can have your labs drawn at one of Thrive's partner labs instead.

FAQ

1. Does it hurt?
Most people say no. You might feel a quick pinch when you press the button, and that's about it. In research comparing collection methods, people rated Tasso far less painful than a standard blood draw.

2. How long does it take?
The draw itself takes a few minutes. Give yourself 10 to 15 minutes start to finish, including setup and packing.

3. Do I have to sign up for TRT?
No. Know Your Numbers is just the lab test. You get your results and a physician review, and the next step is up to you.

4. What if I can't fill the tube?
Don't send it in. A sample that doesn't reach the fill line can't be tested. Reach out to your care team instead, and we'll send you a new kit at no cost. If a kit is lost, damaged, or shipped to the wrong address, a replacement fee applies.

5. How do I know if I should get tested?
Fatigue, low libido, mood changes, and losing muscle more easily are a few common signs. Our guide to low testosterone symptoms and when to get tested covers what to watch for.

Stop guessing

Wondering whether your testosterone is low won't give you an answer. A lab test will.

Know Your Numbers shows you where your testosterone and related hormones stand, with a Thrive physician reviewing every result, and you never have to leave the house. If your numbers point to low T, you'll know exactly what to do next. If they don't, you can cross it off the list.

This article is for informational purposes only and is not a substitute for professional medical advice. Talk with your healthcare provider about your individual health needs.