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

If you’re doing everything right — eating well, exercising, taking your vitamins — but still can’t shift the weight, a hormone imbalance may be working against you. Hormone Health Educator Candace Burch of ZRT Laboratory breaks down the 8 most common hormonal culprits behind unexplained weight gain, from estrogen dominance and high cortisol to low vitamin D, disrupted sleep and a lack of strength training.

Weight management is a topic that generates a lot of questions — and hormone imbalance is one of the most common but overlooked causes. Hormone Health Educator Candace Burch of ZRT Laboratory answers the 10 most frequently asked questions about hormones and weight gain, covering everything from postmenopausal belly fat and estrogen dominance to vitamin D deficiency, thyroid imbalance and why standard blood tests often miss the picture.

Weight loss failure is rarely just about willpower or diet — hormones are almost always involved. In this Q&A, Dr. Alyssa Burns-Hill of ZRT Laboratory tackles the most common questions from people struggling to lose weight despite their best efforts: from thyroid interference by the contraceptive pill and stress-driven cortisol cravings, to estrogen-reducing supplements, natural progesterone for menopause, and why 5-HTP can be a game-changer for mood, sleep and comfort eating.

Cortisol is your body’s primary stress hormone, produced by the adrenal glands in response to physical, mental and emotional stress. While it plays a vital role in energy metabolism, immune function and cardiovascular health, both chronically high and chronically low cortisol levels can cause significant health problems — from fatigue, weight gain and sleep disorders to burnout and adrenal exhaustion. This article explains what cortisol is, what happens when it goes wrong, and why regular testing matters.

Reverse T3 (rT3) is one of the most misunderstood markers in thyroid testing. Often called the “hibernation hormone,” it is frequently claimed — without scientific basis — to block thyroid receptors and slow metabolism. In Part 2 of this series, Margaret Groves of ZRT Laboratory examines what the peer-reviewed literature actually says about rT3, when elevated levels are clinically meaningful, and how to interpret the T3/rT3 ratio in the context of a comprehensive thyroid assessment.