Physician-Written Education

Bring the Joy Back into Living

Evidence-based articles on hormone optimization, metabolic health, and medical aesthetics — written and reviewed by Dr. Gregory Allen, MD.

Hormone Therapy Weight Management Medical Aesthetics Dr. Allen's Book
Recovery, Sleep, and the GH Question
Hormone Therapy

Growth-Hormone Peptides: The Honest Take on Recovery and Sleep

Sermorelin, ipamorelin, and the promise of better sleep and recovery. What growth-hormone-releasing peptides really do — and the questions to ask first.

6 min readRead →
What the Headlines Got Wrong
Hormone Therapy

Is Hormone Therapy Safe? What the Headlines Got Wrong About the WHI

A single 2002 study scared a generation of women away from hormone therapy. Here's what the corrected data actually shows.

7 min readRead →
Separating Fact From Fear
Hormone Therapy

Thinking About TRT? What to Expect — and the Myths to Ignore

Testosterone therapy is surrounded by locker-room myth and internet fear. Here's a straight, physician's account of what responsible TRT actually involves.

6 min readRead →
Skin Is an Organ
Medical Aesthetics

Estrogen, Collagen, and Your Skin: Why Hormones Change How You Age

Your skin is an organ that responds to what's happening inside. Why the best aesthetic results start below the surface.

5 min readRead →
It's Not All in Your Head
Hormone Therapy

Menopause Brain Fog Is Real: The Estrogen–Brain Connection

Word-finding lapses, fuzzy focus, and “why did I walk in here?” moments. Brain fog around menopause isn't imagined — and there's a hormonal reason behind it.

6 min readRead →
When the Spark Fades
Hormone Therapy

Low Testosterone in Men: When Your Spark Begins to Fade

Fatigue, lost drive, stubborn belly fat, low motivation — the quiet signs of andropause that too many men are told to just accept.

6 min readRead →
Lose Fat, Keep Muscle
Weight Management

Losing Weight on a GLP-1? Don't Lose Your Muscle With It

GLP-1 medications are powerful — but rapid weight loss can take muscle along with fat. Here's how to protect the lean mass that keeps you strong and metabolically healthy.

6 min readRead →
When the System Shifts
Hormone Therapy

Perimenopause: Why You Feel Different Years Before Menopause

The changes often begin in your late 30s or 40s — long before your cycle stops. Here's what's really happening.

6 min readRead →
The Body's Own Signals
Hormone Therapy

Peptide Therapy, Explained: What Peptides Are — and What They Aren't

Peptides are everywhere in wellness marketing right now. Here is a clear, honest, physician's-eye view of what they actually are and how they're used responsibly.

6 min readRead →
The Hidden Disruptor
Weight Management

Insulin Resistance: The Hidden Hormone Behind Stubborn Weight Gain

Insulin resistance begins long before diabetes — and it can quietly stall your energy, weight, and hormones for years.

6 min readRead →
A Shift Two Decades in the Making
Hormone Therapy

The FDA Just Softened Its Warning on Menopause Hormone Therapy. Here's Why It Matters.

In 2026 the FDA removed the prominent “boxed warning” from several menopause hormone therapies — a shift that finally matches what the science has said for years.

5 min readRead →
What the FDA Change Means for You
Weight Management

The FDA Is Ending Mass-Compounded GLP-1s: What It Means If You're on One

In 2026 the FDA moved to end large-scale compounding of semaglutide and tirzepatide. Here is what that means for your weight-loss plan — in plain language.

5 min readRead →
The "Normal" Thyroid
Hormone Therapy

Hypothyroidism: The Silent Epidemic Hiding Behind "Normal" Thyroid Labs

Exhausted, cold, gaining weight — but told your thyroid is fine? Why a single TSH test can miss the whole story.

6 min readRead →
The Gray Zone
Dr. Allen's Book

The Gray Zone: The Space Between Sick and Well Where Millions Are Living

Your labs are "normal," but you don't feel well. There is a name for that space — and a way out of it.

7 min readRead →
Normal Labs, Still Not Fine
Hormone Therapy

What is Bioidentical HRT? Why "Normal" Labs Don't Always Mean You're Fine

If you've been struggling with persistent fatigue, brain fog, or poor sleep — and been told your labs are "normal" — here's why that isn't the whole story.

6 min readRead →
Why "Eat Less, Move More" Fails
Weight Management

Why "Eat Less, Move More" Fails: The Hormonal Truth About GLP-1 Weight Loss

Willpower is not the problem. Your biology is. Why Tera Fe runs a full hormonal workup before prescribing any GLP-1.

7 min readRead →
How You Feel & How You Look
Medical Aesthetics

The Connection Between How You Feel and How You Look

For nearly two decades, Tera Fe has helped patients feel years younger on the inside. Now our medical aesthetics help the mirror match.

5 min readRead →
Why Do I Feel Like This?
Dr. Allen's Book

Why Do I Feel Like This? — Dr. Allen's New Book Is the Guide You Wish You Had Sooner

When your labs are normal, but you are not. An honest, compassionate guide to the "Gray Zone" between obviously ill and truly well.

8 min readRead →
G

Gregory S. Allen, MD

Dr. Allen is a board-certified physician and founder of Tera Fe in Mesa, AZ. With over 20 years of clinical experience — more than 10,000 patient visits and 1,000+ personalized hormone protocols — he specializes in bioidentical hormone replacement, metabolic health, and medical aesthetics. He is the author of Why Do I Feel Like This?