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

As the days shorten and sunlight fades, four key hormonal systems come under pressure: vitamin D, serotonin, cortisol and melatonin. For those susceptible to Seasonal Affective Disorder (SAD), the disruption of these interconnected rhythms can trigger depression, fatigue, poor sleep and low mood. This article explains the science behind the SAD hormone pattern — and what you can do to support your body through the darker months.

Bromine has long been considered a non-essential trace element — but groundbreaking research published in Cell suggests it may be the 28th essential element required for collagen IV formation and connective tissue development. This article explores the science behind bromine’s newly discovered role, its toxicity risks (bromism), its interactions with iodine and thyroid function, and why measuring bromine alongside other elements may be clinically relevant.

At-home hormone testing using saliva, dried blood spot and dried urine collection is not only more convenient than clinic-based blood draws — it is also safer, more accurate for certain hormones, and essential for capturing time-sensitive samples like waking cortisol or first-morning melatonin. This article explains how each collection method works, why dried samples carry minimal infection risk, and how ZRT Laboratory’s CLIA-certified processes ensure reliable results.

The FDA doesn’t require cosmetics to be tested for safety before going to market — and studies have found lead, cadmium, arsenic and mercury in popular lipsticks used daily by millions of women. Discover the health risks of heavy metal exposure from beauty products and how a simple at-home test can reveal your body burden.

Learn why the biological sample used for element testing — urine, whole blood, serum, hair, or nails — can dramatically change how toxic and essential mineral results are interpreted. Discover how different sample types reveal recent intake, long-term exposure, body burden, deficiency, or chronic toxicity for elements like mercury, lead, cadmium, arsenic, selenium, zinc, copper, iodine, and magnesium, and why choosing the correct testing method is critical for clinically meaningful results.