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Dr. Jay Wrigley, NMD  ·  Root Cause Journal

Hormones, Metabolism & Longevity

Clinical insights on the hormonal patterns most doctors miss — written for patients who are done with generic answers.

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andropause

Low Testosterone vs. the Testosterone–Insulin–Cortisol Loop: Why the Distinction Matters for Men Over 45

Low testosterone is real — but for many men over 45, the deeper issue is the testosterone–insulin–cortisol loop. Dr. Jay Wrigle...

May 14, 2026

cortisol

Perimenopause Symptoms vs. Metabolic Pattern: Why the Distinction Changes the Approach

Perimenopause is a hormonal transition — but not every symptom in a woman over 40 is caused by perimenopause alone. Dr. Jay Wri...

May 14, 2026

calories

Midlife Weight Gain Is Not Just Calories: Why the Hormonal Environment Changes Everything After 40

The calorie-in-calorie-out model is not wrong — but it is incomplete after 40. Dr. Jay Wrigley explains why the hormonal enviro...

May 14, 2026

comparison

LCHPMF™ vs. Keto After 40: What's the Difference and Which One Is Right for Your Pattern?

Both LCHPMF™ and ketogenic diets reduce carbohydrates — but they operate from fundamentally different frameworks. Dr. Jay Wrigl...

May 14, 2026

cortisol

Hormone Assessment vs. Standard Lab Testing: Why Normal Results Don't Always Tell the Full Story

Standard lab testing and Dr. Jay Wrigley's free Hormone & Metabolism Assessment serve different purposes. Here's what each ...

May 14, 2026

cortisol

Why High-Fat Keto Can Backfire After 40: The Cortisol, Thyroid, Estrogen, and Insulin Mechanisms

A deep clinical look at five specific mechanisms — cortisol amplification, thyroid conversion suppression, estrogen dominance, ...

May 14, 2026

cortisol

Estrogen Dominance, Thyroid Conversion, and Weight Gain After 45

Weight gain after 45 is often not a calorie problem. Dr. Jay Wrigley explains how estrogen dominance, thyroid conversion failur...

May 14, 2026

blood sugar

Why Women Wake Up at 3 A.M. in Perimenopause

Waking at 3 a.m. in perimenopause is not random. Dr. Jay Wrigley explains the progesterone, cortisol, blood sugar, and estrogen...

May 14, 2026

cortisol

Is Keto Still Right After 40? Why High-Fat Keto Can Backfire When the Hormonal Engine Changes

Keto works for some people — but for many adults over 40, high-fat ketogenic eating can backfire. Dr. Jay Wrigley explains the ...

May 14, 2026

cortisol

Why Your Body Stops Responding After 40

You are doing everything right — but your body has stopped responding. Here is why the rules changed after 40, and what the LCH...

May 14, 2026

blood sugar

Why You Wake Up at 2–4AM After 40 (And What It Actually Means)

It is not just stress or aging. Your cortisol rhythm, blood sugar stability, hormonal signaling, and nervous system have all c...

May 01, 2026

adrenal

The Cortisol Problem No One Explains After 40

Why your stress response itself has changed — and why the old "just relax" advice no longer works. Section 1: The Cortisol Pr...

May 01, 2026

andropause

What Natural Protocols Protect Muscle and Metabolism While On or Off GLP-1 Medications

In my thirty-plus years as a Functional Medicine doctor specializing in hormones and metabolism, I have never seen a medicati...

Apr 28, 2026

Andropause

Midlife Body Changes After 40: Why Nothing Works

In my thirty-plus years of clinical practice as a Functional Medicine Doctor specializing in hormones and metabolism, I have sa...

Apr 28, 2026

14 archetypes

LCHPMF Complete Guide: The Midlife Metabolic Framework

The definitive guide to LCHPMF—the metabolic framework designed for adults over 40 who need more than a standard diet to lose f...

Apr 10, 2026

brain fog

Perimenopause Blueprint: Beyond Low Estrogen

Perimenopause involves more than estrogen. This clinical blueprint covers progesterone, cortisol, insulin, and the full hormona...

Apr 10, 2026

belly fat

Cortisol Dysregulation: Hidden Driver of Midlife Fatigue

Chronic cortisol dysregulation drives fatigue, belly fat, and poor sleep in midlife. Here's how to identify and correct it clin...

Apr 10, 2026

andropause

Andropause: Testosterone Decline Most Doctors Miss

Low testosterone in men over 40 is real and underdiagnosed. Learn the symptoms, lab markers, and clinical strategies for androp...

Apr 10, 2026

cortisol

Perimenopause: The Real Hormonal Cascade Explained

Perimenopause isn't just low estrogen. Discover the full hormonal cascade—progesterone, cortisol, insulin resistance—and how to...

Apr 10, 2026

adrenal

Cortisol Burnout: Exhaustion, Belly Fat & Brain Fog

Cortisol burnout creates a specific pattern: wired but tired, belly fat, poor sleep, and brain fog. Here's how to identify and ...

Apr 10, 2026

andropause

14 Hormone Patterns Doctors Miss in Midlife | Dr. Jay

Most doctors test for one or two hormones. Dr. Jay identifies 14 distinct midlife hormone patterns that explain why you still f...

Apr 10, 2026

cortisol

Normal Labs, Still Feel Terrible? Here's Why

Lab results look normal but you feel exhausted, foggy, and stuck? Learn the clinical reasons standard labs miss functional horm...

Apr 10, 2026

cortisol

Midlife Hormonal Cascade: Estrogen, Progesterone & More

What really happens to estrogen, progesterone, and testosterone in midlife? A clinical breakdown of the hormonal cascade and it...

Apr 01, 2026

cortisol

Your Metabolism Isn't Broken—It's Hormonally Reprogrammed

Your metabolism didn't break—it was reprogrammed by hormones. Learn why fat loss stalls after 40 and the clinical strategy to r...

Apr 01, 2026

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