Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — progesterone testing

If you are experiencing infertility issues, understanding which hormones to test — and why — is the essential first step. Dr. Alison McAllister of ZRT Laboratory explains the full fertility hormone profile: from LH and FSH as indicators of ovarian reserve, to estradiol, progesterone and testosterone for ovulation health, adrenal hormones cortisol and DHEA-S, thyroid markers including TPO antibodies, and the often-overlooked role of vitamin D in fertility and PCOS.

Breast cancer is not one disease — it encompasses many distinct types with different attributes, degrees of invasiveness and treatment responses. Understanding the difference between invasive and non-invasive cancers, what hormone receptor status means, and which risk factors are modifiable can help women make more informed decisions about screening, lifestyle and hormone health. This article provides a clear, evidence-based overview.

Menopause affects approximately 40–50 million women in the US alone — yet it remains widely misunderstood. This article answers the five essential questions: who is affected, what menopause actually is, when it typically begins, where in the body it originates, and why hormone balance is the key to navigating this natural transition with health and vitality.

One in eight women will be diagnosed with breast cancer in their lifetime. But many risk factors are modifiable — including hormone imbalance and excess weight. Discover the two most important actions women can take to reduce breast cancer risk, and how hormone testing can help identify hidden imbalances before they become a problem.

In 1999, Tina Mattern was diagnosed with breast cancer and faced a terrifying choice of conventional treatments. Instead, she discovered the work of Dr. David Zava and ZRT Laboratory, and chose a path of natural hormone balancing, saliva testing and lifestyle change. This is her story — and her happy ending.