Aging Isn't Skin Deep: Why I Treat It From the Inside and Out

I get asked a version of this question almost every week, usually by someone who found me through one door and then noticed the others. A patient books a CO2 laser and sees that we run epigenetic age testing. Someone on a peptide protocol notices the laser suite down the hall. A referral for a skin check reads the website and wonders why a dermatologist is talking about metabolic health and plasma exchange.

The question is always some form of: how does this all fit together? It deserves a real answer, because the answer is the entire philosophy of this practice, and because the science behind it has moved a long way in the last decade.

The mirror is a report card

Here is the thing most people have never been told. What you see in the mirror is not the problem. It is the report card.

The dullness, the fine lines, the pigment that showed up after your forties, the loss of firmness along the jaw. Every one of those is real and every one of them is worth treating. But they are outputs. They are the visible result of a process that has been running underneath the surface for years, in tissue you cannot see and would never think to look at.

The clearest way to say it: the skin is the one organ where aging is visible in real time. Dermatologists have known for decades that photoaged skin and intrinsically aged skin share the same cellular signature, thinner dermis, fragmented collagen, fewer functional fibroblasts, more senescent cells and a rising inflammatory tone. What changed recently is that we can now measure the same signature in blood, in fat, in vessels and in the epigenome, and it moves together.

Aging isn't skin deep. The skin is simply the organ you can see.

If you only ever treat the mirror, you are correcting the report card without ever looking at the student. It can be done, and there is nothing wrong with wanting to look well. But it is a strategy of repeated correction, and the results tend to have a short shelf life, because the process producing them was never touched.

What is actually aging you

In 2023, the field's reference framework was updated to twelve hallmarks of aging. Three of them do most of the visible work in skin, and all three are the same ones that drive cardiovascular and metabolic disease elsewhere in the body.

Chronic inflammation

Not the acute kind you get from a cut or a cold, but the low-grade kind that runs in the background for decades. The term in the literature is inflammaging. Circulating IL-6, TNF-α and hs-CRP rise with age, and in large cohorts an elevated IL-6 roughly doubles the risk of death from cardiovascular causes. In skin, the same cytokines activate matrix metalloproteinases, the enzymes that chew through collagen and elastin, which is why chronically inflamed skin looks older than its calendar age.

Cellular senescence

A large part of that inflammation comes from cells that have reached the end of their useful life but refuse to die. The proper term is senescent cells. I call them zombie cells, because that is what they are. They stop dividing, resist the normal signals for programmed death, and instead of being cleared they sit in the tissue and secrete a cocktail of inflammatory proteins, the senescence-associated secretory phenotype, or SASP, that damages every healthy cell around them.

They accumulate with age, they accumulate faster with metabolic stress, and they are found in skin, blood vessels, joints and organs alike. In sun-exposed skin, senescent fibroblasts can make up a meaningful fraction of the dermal population by the sixth decade. And because SASP factors and extracellular vesicles travel in the blood, a senescent burden in one tissue is not a local problem. It raises the inflammatory tone everywhere. I have written about that systemic hypothesis separately.

Deregulated nutrient sensing and hormonal decline

Layer on top of that the metabolic drivers. Visceral fat is not storage; it is an endocrine organ that secretes IL-6 and TNF-α and drives insulin resistance, which in turn accelerates glycation of collagen and impairs repair. Hormonal decline removes the body's natural brakes: falling estrogen thins the dermis and reduces collagen synthesis measurably within the first years of menopause, and low testosterone lowers AMPK activity, the cellular energy sensor that keeps mitochondria and fat oxidation working.

And the accelerant: ultraviolet light

Ultraviolet radiation does to the skin what all of the above does to the rest of you, only faster and where you can watch it happen. Photons create cyclobutane pyrimidine dimers in keratinocyte DNA, generate reactive oxygen species, push fibroblasts into senescence, and suppress local immune surveillance. Photoaging and skin cancer are the same biology at different stages, which is a point I will come back to.

Inside: measure it, then treat it

The longevity side of the practice exists to do two things, in order.

First, measure

I do not believe in guessing about aging, and I do not believe in selling a protocol to someone whose biology I have not looked at. So we start with data. Biological age through DNA methylation, using clocks such as DunedinPACE that estimate the pace of aging rather than a single snapshot. Inflammatory markers: hs-CRP, IL-6, TNF-α, homocysteine. Metabolic markers: fasting insulin and HOMA-IR, the triglyceride-to-HDL ratio, ApoB, HbA1c. Hormones. Oxidative reserve through PAOT testing. Body composition and visceral fat by DEXA, and where appropriate liver fat by MRI and early cancer detection through multi-cancer blood screening.

This is what "measured, not guessed" means in practice. It tells us where the inflammation is coming from and what is actually driving your aging, rather than what a marketing brochure assumes is driving it. Our diagnostics page lists the full panel.

Second, treat what the data shows

• Peptide protocols targeting repair and inflammation, sourced only from licensed compounding pharmacies, and only where the evidence supports the indication. I have published my own reading of that evidence, including the negative findings.
• GLP-1 receptor agonists, not as a weight-loss gimmick but as one of the most effective tools we have for shutting down the metabolic engine behind chronic inflammation. Trials consistently show reductions in hs-CRP alongside reductions in visceral fat, with a protocol that protects muscle and facial volume.
• Hormone optimization where labs and symptoms agree, monitored properly, because restoring what was lost is not the same as artificially elevating it.
• Therapeutic plasma exchange, which removes plasma proteins, inflammatory mediators and senescent-cell debris from the circulation directly. Early controlled data in older adults suggest it can shift epigenetic age estimates and immune markers in a younger direction; it remains an intervention we reserve for the right patient and re-measure carefully.

Every one of those tools is aimed at the same target: turning the inflammatory engine down. Then we measure again. If the numbers do not move, the protocol was wrong, and I would rather know that than keep you on it.

Outside: rebuild the skin

The laser med spa and the dermatology side of the practice work on the organ you can see, and here the biology is more interesting than "resurfacing" suggests.

CO2 laser is the anchor

A properly powered fractional CO2 treatment does not hide damage. It creates thousands of microscopic columns of controlled thermal injury through the epidermis into the dermis, removes damaged, sun-aged tissue in the process, and forces the skin to rebuild itself with new collagen over the following three to six months. Histology after ablative fractional resurfacing shows reduced p16-positive senescent fibroblasts in the dermis and normalized responses to subsequent UV exposure. In other words, the laser does in skin something close to what we are trying to do internally: clear what is broken and let healthy tissue take its place.

The evidence base is now more than cosmetic. In a five-year controlled study, fractional laser resurfacing of photodamaged forearms reduced subsequent keratinocyte carcinomas by roughly two thirds. Non-ablative fractional 1927 nm treatment has reduced actinic keratosis counts by more than half in field studies. And a 2026 split-face pilot of a 1940 nm platform reported DNA-methylation shifts in treated skin moving opposite to the direction of aging. This is early, but it is the first time a laser has been shown to touch the epigenetic layer, and we track it in our own patients.

The rest of the toolkit does the same job at different depths

Focused ultrasound reaches the SMAS layer that CO2 cannot. Radiofrequency microneedling remodels the mid-dermis. Biostimulators such as poly-L-lactic acid and calcium hydroxylapatite recruit fibroblasts to lay down new collagen for a year or more. Physician-formulated skincare with DNA-repair enzymes and antioxidant complexes protects the result and, in our own data, lowers oxidative stress and actinic keratosis burden on its own. These are tools for making the skin rebuild, not tools for covering it up. One treatment rarely does it; the combination does.

Dermatology is where prevention and vigilance live

Skin cancer and photoaging are, biologically, the same disease at different stages: the same UV-induced mutations, the same senescent field, the same suppressed immune surveillance. Organ transplant recipients on immunosuppressants develop skin cancer at 65 to 100 times the population rate, which is the clearest evidence we have that the immune terrain decides whether a mutated cell becomes a tumour. The dermatologist who checks your skin for cancer and the physician who treats your photoaging should be the same person, looking at the same tissue with the same understanding of what damaged it.

Why you need both

Here is the honest case for doing it this way, and the honest case against doing it any other way.

Treat only the outside, and you are resurfacing the front of a house while the foundation keeps shifting. The results can be excellent and they can still fade faster than they should, because new collagen is being laid down into an inflammatory environment that degrades it. Wound-healing studies are consistent on this: elevated inflammatory markers, low vitamin D, uncontrolled glucose and hormonal deficiency all slow collagen synthesis and raise complication rates after resurfacing. That is why we run bloodwork before aggressive CO2, and sometimes delay the laser to fix the terrain first.

Treat only the inside, and you may improve your biology substantially and never see it. The skin carries decades of accumulated structural damage, fragmented elastin, solar elastosis, field cancerization, that internal optimization alone will not erase. You feel better, your numbers improve, and the mirror does not catch up.

Treat both, and something useful happens. The internal work makes the skin a better environment to rebuild in, so lasers and regenerative treatments hold their results longer. And the skin becomes the visible proof that the internal work is doing something. You do not have to take my word for it, or trust a number on a lab report. You can see it, and we photograph and measure it under standardized imaging so you can see it objectively too.

The inside and the outside are not two services. They are two ends of the same process, and I would rather treat the process than chase its symptoms.

What this means if you come to see me

1. Your first appointment will involve more questions and more measurement than you might expect from a med spa, because I want to know what is aging you before I treat it.
2. I will sometimes tell you that the treatment you came in for is not the one you need first. If your internal markers suggest the environment is not ready, I would rather fix that and then do the laser than do the laser and watch the result fade.
3. The goal is never a face without lines. The goal is skin that is biologically younger than it was, on a body that is biologically younger than it was, with data to show it. Looking well is the consequence, not the target.
4. I will not guess. Measure, treat, measure again. Validate. Track.

Aging isn't skin deep. I treat it inside and out. If that makes sense to you, I would be glad to see you.

Frequently asked questions

Sources

• López-Otín C, et al. Hallmarks of aging: an expanding universe. Cell. 2023;186(2):243–278.
• Franceschi C, et al. Inflamm-aging: an evolutionary perspective on immunosenescence. Ann N Y Acad Sci. 2000;908:244–254.
• Ferrucci L, Fabbri E. Inflammageing: chronic inflammation in ageing, cardiovascular disease, and frailty. Nat Rev Cardiol. 2018;15:505–522.
• Fitsiou E, Pulido T, Campisi J, Alimirah F, Demaria M. Cellular senescence and the senescence-associated secretory phenotype as drivers of skin photoaging. J Invest Dermatol. 2021;141(4S):1119–1126.
• Chen R, et al. Single ablative fractional resurfacing laser treatment results in removal of senescent fibroblasts. PMC. 2019.
• Spandau DF, et al. Randomized controlled trial of fractionated laser resurfacing on aged skin as prophylaxis against actinic neoplasia. J Clin Invest. 2021;131(19):e150972.
• Schallen KP, et al. Non-ablative fractional laser 1940 nm treatment modulates epigenetic signatures associated with skin aging. Sci Rep. 2026;16:17695.
• Wheless L, et al. Skin cancer in organ transplant recipients: more than just sun. PMC. 2014.
• Belsky DW, et al. DunedinPACE, a DNA methylation biomarker of the pace of aging. eLife. 2022;11:e73420.
• Ghanim H, et al. Testosterone increases the expression and phosphorylation of AMP kinase α in men with hypogonadism and type 2 diabetes. JCEM. 2020;105(4):1169–1178.
• Sareen K, Chen Y, Matveev A, et al. Novel cosmeceutical to improve skin quality, reduce photodamage and decrease actinic keratoses. Journal of Skin. 2026;10(3).