# Testosterone Markers

Testosterone plays a critical role in muscle growth, energy, and overall well-being, but not all testosterone in your body is available for use. The key distinction lies in how testosterone is classified—some forms are readily available to the body, while others are [bound to proteins and inactive](https://www.rethinktestosterone.com/blog/free-and-total-testosterone).

Here’s a breakdown of the categories that define testosterone levels:

- **Total Testosterone**: The total amount of testosterone in your bloodstream, including both active (free) and inactive (bound) testosterone. While this number is a general indicator of testosterone levels, it doesn’t tell the full story of what your body can actually use.
- **Free Testosterone**: The unbound form of testosterone, making up only 1-3% of Total T. Free T is the biologically active portion available for muscle development, energy production, and sexual health.
- [**Bound Testosterone**](https://www.google.com/url?q=https://pmc.ncbi.nlm.nih.gov/articles/PMC4975356/%23:~:text%3DTestosterone%2520exists%2520in%2520the%2520bloodstream,which%2520is%2520bound%2520to%2520albumin&sa=D&source=docs&ust=1741720032248361&usg=AOvVaw0Gi-WVJyQvwv-kxkNpiFIH): The majority of testosterone in the body is bound to proteins, which affects whether it can be used.

- **SHBG-Bound Testosterone**: Testosterone that is bound to Sex Hormone Binding Globulin (SHBG). SHBG tightly binds testosterone, making it inactive and unavailable to the body. Higher SHBG levels can significantly lower Free T and limit its effectiveness.
  - **Albumin-Bound Testosterone**: While also bound, Albumin-Bound Testosterone is loosely attached and can be converted back into an active form, making it more accessible than SHBG-bound T.
- **Bioavailable Testosterone**: The sum of Free T and Albumin-Bound T. This is the testosterone that the body can actually use for key functions like muscle growth, energy production, and metabolism.

## Why Free Testosterone Matters

While Total T provides a broad picture of your testosterone levels, Free T is what truly drives performance, strength, and well-being. Even if your Total T levels appear normal, high SHBG can reduce Free T, leading to fatigue, muscle loss, and diminished libido.

Maintaining optimal Free T levels supports:

✔ Strength & Muscle Development – Low levels of Free T can lead to muscle loss and increased fat storage, making it harder to maintain a strong, lean physique.

✔ Stamina & Energy – Free T helps regulate red blood cell production and oxygen delivery, boosting endurance, reducing fatigue, and keeping energy levels stable throughout the day.

✔ Sexual Health & Performance – Testosterone plays a key role in libido, erectile function, and overall confidence. Low Free T can result in decreased sex drive and reduced performance.

## How KYZATREX® Supports Free Testosterone

Not all testosterone replacement therapies work the same way. While many treatments focus on raising Total T levels, they don’t always address the real issue—low Free T. That’s where KYZATREX® stands out.

- **Lowers SHBG** – High levels of SHBG can trap testosterone, making it unavailable for the body to use. KYZATREX® bypasses the liver and has been shown to reduce [SHBG by 30%](https://www.google.com/url?q=https://www.kyzatrex.com/prescriber/about-kyzatrex-prescriber/&sa=D&source=docs&ust=1741716850842931&usg=AOvVaw2L2iaGOJKC-tbR56erpGEL), ensuring more testosterone stays active and bioavailable.
- **Doubles Free T Levels** – In a 6-month clinical study, KYZATREX® doubled Free T levels by Day 90, helping men experience real improvements in strength, energy, and sexual health.
- **Convenient Oral Treatment** – Unlike injections or patches, KYZATREX® is an FDA-approved oral testosterone therapy, offering steady, effective hormone delivery without the hassle of frequent injections or messy topical applications.

While KYZATREX® helps increase Free T levels by reducing SHBG and improving testosterone availability, your daily habits play a crucial role in how effectively your body utilizes that testosterone. Here’s how you can support your Free T naturally:

✔ Strength Training & Resistance Workouts – [Lifting weights and engaging in compound movements](https://www.google.com/url?q=https://livethrive.co/blog/best-workouts-for-trt-journey&sa=D&source=docs&ust=1741720109781913&usg=AOvVaw3XLbYdqGC2hixegG4Yp7xQ) like squats and deadlifts stimulates testosterone production and helps maintain lean muscle mass.

✔ Proper Nutrition – A diet rich in healthy fats ( [like avocados and nuts](https://www.google.com/url?q=https://blog.loopnutrition.com/good-fats-vs-bad-fats&sa=D&source=docs&ust=1741716774008938&usg=AOvVaw2KOKaxIOKNe7QSA1aGTNNs)), lean proteins, and key minerals (such as zinc and magnesium) supports hormonal balance and muscle growth.

✔ Reducing Stress & Prioritizing Sleep – Chronic stress and poor sleep increase cortisol levels, which can negatively impact testosterone production. Getting 7-9 hours of quality sleep and managing stress through relaxation techniques or mindfulness can help keep Free T levels optimized.

✔ Staying Active – While intense workouts are important, daily movement matters too. Activities like walking, stretching, and staying generally active support circulation, metabolism, and hormone regulation.

When combined with KYZATREX®, these lifestyle habits enhance the effectiveness of your TRT, helping you achieve better strength, stamina, and overall well-being.

## Is KYZATREX® Right for You?

If you’re struggling with low energy, muscle loss, or decreased libido, your Free Testosterone levels could be the missing link. Total T alone doesn’t tell the full story—it’s Free T that determines how much testosterone your body can actually use.

KYZATREX® is designed to optimize Free T by reducing SHBG and making more testosterone available where it matters most. If you’re ready to take the next step toward better performance, increased energy, and long-term health, Thrive’s medical experts are here to help.

*This article is for informational purposes only and does not constitute medical advice. The information contained herein is not a substitute for and should never be relied upon for professional medical advice. Always talk to your doctor about the risks and benefits of any treatment.*