Hormones, biomarkers, and why your best decade is still ahead of you

In this episode: the real story behind D5 Health straight from the founder building it, plus Dr. Philip Deibel's take on hormones, peptides, biohacking, and why most of us are settling for "fine" when we could feel like ourselves again.

If you have spent any time talking about wellness in Raleigh over the last year, you have probably heard the name Dr. Philip Deibel. D5 Health. Personalized longevity medicine. The doctor who actually listens. These are not just buzzwords. They are the foundation of a new model of care that is changing how Raleigh approaches health.

In this episode of Best of Raleigh, host Gretchen Coley sits down with Dr. Philip Deibel, founder of D5 Health, for an honest conversation about hormones, gut health, biomarkers, and why he believes most people have no idea how good they are supposed to feel.

From Delivering Babies to Building D5 Health

Phil's path into longevity medicine was not a straight line. A Raleigh native and double Deacon (undergrad and medical school at Wake Forest), he spent twelve years as an OBGYN at Arbor, formerly Atrium OBGYN, delivering babies, performing robotic surgeries, and building a thriving practice.

But something shifted.

After his third child, he found himself unable to finish charting at the end of the day, taking five-minute naps in his car before walking inside, and not feeling like himself. A visit to a colleague revealed his testosterone was in the toilet. That moment cracked open a door he could not close.

He started reading every book he could find on functional medicine. Once your eyes are open to root cause medicine, you cannot unsee it. Why prescribe a stool softener when you could ask why someone is constipated? Why hand out reflux pills when you could fix the gut? The questions kept getting bigger, and the insurance model kept getting smaller.

So he built D5 Health.

The Model That Built D5

Most doctors in conventional practices see twenty to twenty-five patients a day. Phil sees three.

That number is not a typo. It is the entire point.

Each visit is blocked for ninety minutes to two hours. Patients fill out detailed paperwork beforehand, and Phil reads it. He asks more questions than they have ever been asked. Then he and the patient build a personalized plan together.

His approach is built on three pillars:

• Test, do not guess, advanced biomarkers that go far beyond standard panels
• Listen first, the conversation drives the protocol, not the other way around
• Lifestyle before prescriptions, especially with younger patients

That last value is the one Phil comes back to again and again. Conventional medicine treats symptoms because there is no time for anything else. D5 hunts for the why. If a twenty-five-year-old man has low testosterone, the answer is not just to prescribe more. The answer is to ask what is happening in his sleep, his stress, his food, his environment, and fix the root.

Advanced Biomarkers: The Tests Most Doctors Never Order

Walk into a standard physical and you will get a basic cholesterol panel. Walk into D5 and Phil is looking at markers most primary care doctors do not even know to order.

Things like LP little a, a genetic cholesterol marker with a sticky tail that wreaks havoc on blood vessels and is just now showing up on cardiologists' radar. ApoB, a newer cholesterol marker that gives a much clearer picture of cardiovascular risk. Targeted vascular inflammation, gut testing, mold and heavy metal panels, environmental toxin screens.

The philosophy is simple: measure what matters before it becomes a diagnosis.

And the data is changing what is possible.

D5 patients are getting biological age tests that break down how old your heart is, your brain is, your immune system is, your liver is. Suddenly "you are healthy for your age" gets replaced with "your cardiac age is eight years older than your chronological age, and here is exactly what we are going to do about it."

Hormones and the Perimenopause Conversation

The newest chapter in women's health is finally happening, and it is overdue.

For years, perimenopausal women in their forties were told to wait it out, take an SSRI, try a Xanax for sleep, and come back when they were closer to fifty. Phil openly apologizes on behalf of the medical community for that era of care.

D5 is doing it differently.

Progesterone often comes first in the luteal phase to ease perimenopause symptoms. Estrogen and testosterone get layered in based on labs and conversation. For men, low testosterone has become an epidemic, with the "normal" range quietly shifted down over decades to fit a sicker America. Phil pulls patients back to where evolution intended them to be: thirties and forties levels.

Coming up next in the practice: deeper peptide protocols, more advanced hormone optimization, and continued education for patients who want to understand what is actually happening inside their bodies.

It is concierge medicine in a city full of high performers. And that is the point.

Peptides, Biohacking, and the Instagram Problem

D5 is not the only place talking about peptides.

Peptides are short chains of amino acids that act as messenger molecules in the body. Insulin is a peptide. GLP-1s are peptides. There is essentially a peptide for every organ system, and the science is exploding.

The problem? Instagram influencers selling peptides as research-use-only chemicals sourced from overseas.

Phil's blood pressure goes up just talking about it. The unregulated peptide market is dangerous, and patients are buying compounds with no medical guidance, no contraindication review, and no idea what they are actually treating. His advice is simple: never buy anything labeled "research use only," always work with a licensed compounding pharmacy, and get a real medical workup before adding anything.

Each protocol starts the same way: what does the lab show, what is the patient trying to accomplish, and how do we build it on top of lifestyle rather than instead of it.

The ILŪMRA Skin Partnership: Beauty From the Inside Out

D5 is not the only place where Phil's work is showing up in Raleigh.

As the medical director of ILŪMRA Skin, Phil has joined one of the Triangle's most thoughtful new med spas to bring longevity medicine into the skin health conversation. The partnership came together naturally. The previous medical director was a fellow functional medicine doctor with a similar philosophy, and when he relocated to Florida, the alignment with Phil was obvious.

What makes ILŪMRA different is the same thing that makes D5 different.

They are not just stacking the latest treatments. They are healing from the inside out, looking at inflammation, gut health, and hormone balance as the foundation of skin health. Every traditional med spa offering is on the menu, but layered on top of a more complete view of what is actually driving how skin looks and ages.

The newest chapter is regenerative facials using Plated exosomes and growth factors, the kind of next-generation work that pairs perfectly with the deeper protocols Phil runs at D5. Patients can address what they see in the mirror and what shows up in their labs at the same time.

It is a one-of-one model in the Triangle. And that is the point.

The Gift of Listening

Ask Phil about his approach and he will point back to his time as an OBGYN.

Twelve years of conversations with women, many of whom opened up about brain fog, low motivation, hormones, and feeling like a stranger in their own body, taught him that the most underrated skill in medicine is listening. Most doctors have ten minutes. He blocks two hours. The difference is everything.

His personal priorities stack in this order: faith, family, work, community. And he has learned, like most high performers, that it is easy to flip that upside down.

One thing he and his wife Ashley did four years ago that changed their lives: they got Oura rings, watched their sleep scores, and naturally started drinking less. Their scores climbed. They felt better. They craved more bandwidth. The whole thing snowballed into a complete lifestyle shift, and now they run D5 together.

Why Most People Have No Idea How Good They Could Feel

Here is the line that stopped the conversation cold.

Most people walk into a doctor's office, get told their labs are "normal," and walk out assuming this is just what aging feels like. Phil's take?

You are not aging. You are under-tested.

He believes the next twenty years of medicine will make the last twenty look like the dark ages. The U.S. has a thirteen-year gap between lifespan and health span, the worst of any developed country. The job is not just to live longer. The job is to compress that decade of chronic illness at the end and stay sharp, strong, and fully alive the whole way through.

Phil's vote is for density of data over sprawl of supplements. For lifestyle changes before prescriptions. For testing instead of guessing. For getting hormones, gut health, sleep, and stress dialed in long before a diagnosis shows up on a chart.
For the record, most chronic illness stems from diet, metabolic health, and inflammation at the cellular level. That is a fact most patients have never been told.

Fitness, Margin, and the 90 Percent

Phil is an avid cyclist, golfer, and lifter. But for him, fitness is about more than staying in shape.

It is where the nervous system gets reset.

His theory: high performers run themselves at 110 percent until cortisol takes them out. Pulling back to 90 percent and leaving 10 percent of margin for thinking, breathing, and recovery is where the next great idea lives. The vagus nerve stimulator. The morning sunlight.

The 120-heart-rate zone two work. The phone out of the bedroom.

The margin is where longevity lives.

What's Next for D5 Health and Raleigh

D5 is not slowing down. Neither is the longevity movement in Raleigh.

When Gretchen asked Phil what impact he hopes to leave, he deflected the way thoughtful doctors always do. He pointed to his patients. He pointed to his kids, who are already reading labels and lifting weights in the basement. He pointed to the fact that generational health is real, and the chance to dig Raleigh out of an epigenetic slump is right in front of us.

And then he said this:

Test, do not guess.

If you live here, work here, or are tired of feeling "fine" when you used to feel great, that is the line to hang onto.

Rapid Fire with Dr. Philip Deibel

• Morning routine must-have: Early morning light exposure
• Most overrated health trend: Following Instagram influencers
• One metric everyone should track: Sleep
• Go-to workout: Lift weights, lift heavy
• One habit that creates the biggest impact: Consistency

Why It Matters

Dr. Philip Deibel and D5 Health have done more than open another concierge practice. They have built a model rooted in time, data, and the radical idea that patients deserve to be heard. With intention, humility, and a deep belief that root cause medicine matters more than another prescription.

If you want to understand where personalized medicine is going, start with a conversation. Then come back in six months. The labs will be different. And that, according to Phil, is the whole point.

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