Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — insulin and PCOS

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.

When a patient with PCOS or weight issues is told “your blood sugar is normal,” the story is far from over. In this clinical article, Dr. Alison McAllister of ZRT Laboratory explains why insulin — not glucose — is the primary driver of PCOS symptoms, weight gain, testosterone and DHEAS excess, and cortisol dysfunction. Understanding the progression from insulin resistance to hyperinsulinemia to type 2 diabetes is essential for identifying and treating PCOS at the earliest possible stage.