January 10, 2024

What Is Testosterone Undecanoate?

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Written By


photo of Vinita Tandon, MD

Medically Reviewed By

Vinita Tandon, MD

Lifeforce Medical Director

What Is Testosterone Undecanoate?

Testosterone undecanoate is a lab-made version of testosterone, the hormone that’s a big deal for men’s everyday health. Think of it as a testosterone booster for guys who don’t have enough of the natural stuff. It is specially formulated so it releases slowly into the body, making it a favorite for hormone replacement therapy (HRT) and testosterone replacement therapy (TRT). You can get testosterone undecanoate for testosterone replacement therapy as a shot, gel, or pill, but while the shots are a popular choice because they last longer, the ease and simplicity of a pill is hard to beat.

Testosterone helps with all sorts of things like muscle growth, bone strength, and keeping your energy up. If your body isn’t making enough, testosterone undecanoate can step in and get those levels back to where they should be, making you feel better overall. If you think you may be experiencing low testosterone, the Lifeforce Diagnostic measures several key hormone biomarkers, including testosterone and free testosterone. 

How Long Does Testosterone Undecanoate Take to Work?

So, you’re probably wondering how fast you’ll feel the effects. If you’re going the injectable route, it usually takes about three to four weeks to start noticing changes. But, to get the full benefits, it can sometimes take up to six months. Patience is key here because your body needs time to adjust to the new hormone levels.

If you’ve chosen the pill method, like Kyzatrex®, you might see results faster — sometimes even within a few days to a couple of weeks. But the downside is you have to take them more often. Keep in mind that everyone is different, so how quickly it works can depend on things like your dosage, how often you take it, and your overall health. After your initial Lifeforce Diagnostic, you can work with a Lifeforce clinician to decide which method is right for you. 

What Is Testosterone Undecanoate Used For?

Testosterone undecanoate is mostly used for treating male hypogonadism. That’s a fancy way of saying it helps guys whose bodies aren’t making enough testosterone. This can happen for a number of reasons, like injuries, infections, or even treatments like chemotherapy. Symptoms of low testosterone include feeling tired, experiencing a decline in mood, losing muscle mass, and having a low sex drive.

It’s important to use testosterone undecanoate under a doctor’s guidance. Misusing it can lead to serious health problems like heart issues, liver damage, and an increased risk of red cell counts. Regular check-ups are a must to make sure everything’s on track and safe.

Testosterone undecanoate can be a game-changer for men with low testosterone. Just remember, it’s a powerful treatment and should be used responsibly under medical supervision to get the best results.

Read more about testosterone undecanoate here

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Hormone Optimization

Kyzatrex® is an FDA-approved oral testosterone treatment. It is a unique formulation that is highly bioavailable and convenient to administer. It is prescribed for men with low levels of testosterone who are symptomatic and have no contraindications to hormone therapy. Clinical trials revealed 96% of men treated with Kyzatrex® were able to restore their testosterone levels to a normal range. With painless administration and flexible dosing, Kyzatrex® is considered a first-line choice for many men.

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