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This test measures the level of free testosterone in the body. Testosterone is mainly produced by special endocrine tissue in the male testicles, by the adrenal glands in both males and females and, in small amounts, by the ovaries in females.

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What’s Measured

Testosterone has important role in maintaining bone strength, muscle mass and energy level. In women, testosterone contributes to sex drive or libido. Menopause causes significant decline in the testosterone levels. In men, testosterone is responsible for growth and development of sexual characteristics, facial and body hair, increased sexual drive and sperm production. Low testosterone levels can result in conditions like hair loss, reduced muscle mass, hot flashes, depression and increased breast size. High testosterone levels have been linked with aggressive behavior, acne, low sperm count, liver disease and heart muscle damage.


Free testosterone is a small but important component of the total testosterone in a body. It's responsible for key cellular functions since, unlike bound Ts, they can act as receptors for many cells in the body to perform functions like cell replication.

The Results

Fast and Accurate Results at Your Fingertips

Each test is reviewed for accuracy and oversight by a certified healthcare professional that is licensed in your state. Once your test has been completed and reviewed, your results are delivered via our secure member portal at CashLabs.com. You may also review your results on our free mobile app for iOS and Android platforms.

How It Works

Your test is delivered direct to your doorstep in as little as 3 business days.

Register your kit at CashLabs.com using the Kit I.D. included in your box.

Collect your sample and return it with the prepaid shipping envelope in your box.

Your sample is processed and review by a board-certified physician in your state.

Receive and review your results online or via or mobile app for iOS and Android.