Stress & sleep · Dec 10, 2025 · 3 min read
Your cortisol curve is the map of your year
Cortisol should peak in the morning and fall by bedtime. Learn what a four-point cortisol test shows about your stress response that a wearable can't.
The EllaDx Journal
Her biology, explained.
Read clear, research-based articles about hormones, symptoms, and lab tests. Use them to prepare questions for your next visit.
Featured · Hormones
What your luteal phase is actually trying to tell you
A biomarker-level guide to the second half of your cycle - and why most doctors read it wrong.
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Nutrients · Dec 8, 2025 · 1 min read
Ferritin: The Iron Marker Your Doctor Might Be Missing
Ferritin is crucial for diagnosing iron deficiency before anemia develops. Learn why this test matters.
Education · Dec 6, 2025 · 1 min read
How to Read Your Lab Results: A Beginner's Guide
Lab results can be confusing. Learn how to interpret reference ranges, flag results, and understand what your numbers mean.
Symptoms · Dec 4, 2025 · 1 min read
Chronic Bloating: Lab Tests That Can Help Find the Cause
Persistent bloating isn't just uncomfortable - it often has an identifiable cause. Learn which tests can help.
Mental health · Dec 3, 2025 · 3 min read
The hormonal mimics of depression and anxiety
Thyroid, cortisol, and iron - three biomarkers worth ruling out before any prescription.
Symptoms · Dec 2, 2025 · 1 min read
Anxiety and Blood Tests: Physical Causes of Mental Symptoms
Anxiety isn't always "just in your head." These lab tests can reveal thyroid issues, nutrient deficiencies, and other physical causes.
Hormones · Nov 30, 2025 · 1 min read
Lab Tests to Consider Before Starting Birth Control
Hormonal birth control affects your body in many ways. Here are the tests to consider before starting.
Research briefs · Nov 28, 2025 · 2 min read
Brief: new evidence on perimenopause and LDL
A 2025 JAMA paper reframes cardiovascular screening for women in their 40s.
Symptoms · Nov 28, 2025 · 1 min read
Low Energy? Blood Tests That Can Help Explain Why
Persistent low energy often has identifiable causes. Learn which blood tests can reveal the root of your fatigue.
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