02/16/2026
Hormones impact our energy, metabolism, mood, libido, motivation, appetite, sleep quality, focus and more. Having hormones balanced is essential for quality of life, overall health, and longevity.
🧬Saliva testing measures hormones like androgens, progesterone, estrogens and cortisol levels to gain adequate information on deficient and excess hormone levels that could be causing some of the symptoms like fatigue, depression, weight-gain, muscle aches, joint swelling, low libido, anxiety, irritability and more. ZRT Laboratory has completed over 10,000 tests world-wide and this test can be completed in the convenience of your own home!
📲Contact us for our advanced lab testing, like non-invasive Saliva Testing, to help identify the true root cause of your symptoms.
Providers see this all the time: symptoms that do not match what serum levels report. Fatigue, mood changes, sleep issues, cycle changes, hot flashes, and anxiety can all continue even when serum values appear normal.
Saliva testing fills in those gaps and gives providers a clearer picture of what is actually happening in the body.
Here is why:
💧 Saliva measures the bioavailable or active portion of hormones. This is the part your cells can actually use.
🩸 Serum often reflects total hormone levels, which do not always match how a patient feels, especially when binding proteins are high.
🌿 Topical and transdermal hormones behave differently in the body. They often raise tissue levels without changing serum values. Dr. Zava explains this in the podcast and highlights why this matters for HRT monitoring.
🕔 Saliva collections make it easier to capture daily rhythm patterns, especially for cortisol.
Our founder, Dr. David Zava, discusses this and more with Dr. Kenna Stephenson on Episode 61 of the Women Talking Frankly podcast.
🎧 Listen now: https://bit.ly/4p0x6Pg
