Earlier this week at Nervana Medical in Sandy, UT, we ran an ultrasound skin assessment on a patient’s cheek and got a number back: 26%. That number, a ratio between two tiny structures sitting just under her skin, told us more about how her skin is aging than a visual exam alone could. It also helped us customize her treatment options to collagen stimulating treatments such as microneedling , biostimulators such as Sculptra, advanced biologics such as PDGF and of course, at home medical grade skincare.
The layer between your epidermis and dermis
This is one of the tools we reach for when we want an objective baseline to help objectively measure treatment progress with more than just our eyes alone. It is another tool in our tool box to help us provide the best care we can. Here is what we measure, and how that number maps to the menu of skin or aesthetic injectable treatments we choose from.
When we scan a face with our ultrasound, we see the layers of skin in real time: the bright epidermis on top, the dermis below it, and the fat compartments beneath. Sitting between the epidermis and the dermis is a thin dark band called the SLEB (subepidermal low echogenic band).
In healthy, young skin the SLEB is barely visible. As skin ages, from sun damage, inflammation, collagen disorganization, and time, the SLEB thickens. The thicker it gets relative to the dermis, the more aged the skin actually is, regardless of how it looks on the surface.
This matters because two patients can walk in with the same complaint, “my skin doesn’t bounce back the way it used to,” and have very different underlying stories. One might have a SLEB ratio of 8%, meaning youthful skin with well-organized collagen, and need very little. Another might be at 28%, with significant photodamage that no amount of topical product will reach. Measuring tells us which is which and also helps us monitor treatment response.
What the SLEB number actually means
The measurement is a simple ratio: the thickness of the SLEB divided by the thickness of the dermis, multiplied by 100. The interpretation buckets, drawn from published work on ultrasound-based skin assessment:
- Less than 10%: youthful skin with a well-organized dermis. Prevention and maintenance are the priority.
- 10 to 20%: early photoaging. A sweet spot for collagen-stimulating work before damage progresses.
- 20 to 30%: moderate aging with visible collagen changes. A layered approach usually works best.
- More than 30%: advanced photodamage. Longer protocols, honest conversations about what is reversible.
The patient I scanned came in at 26%. On the surface her skin looks similar to the measurement, but it brings in objective data to monitor treatment response to treatments like skin care, biostimulators, microneedling, etc.
When ultrasound skin assessment helps and when it doesn’t
Ultrasound skin assessment is one tool in the toolbox, not a routine screening. We reach for it when:
- A patient wants an objective baseline before starting a treatment series, so we have something to re-measure later.
- The visual exam and the patient’s history do not line up, and we want to understand why.
- A patient has done multiple treatments elsewhere and wants to know whether more of the same is the right call.
- Someone is choosing between a few different approaches (microneedling, biostimulators, energy devices) and wants the assessment to inform the decision.
For many patients, a thorough consult and a careful look at the skin is enough. The ultrasound becomes useful when we want trends and subtle improvements. We build long term treatment plans and we assess results over time.
Microneedling, biostimulators, and beyond
The treatments below all work on different layers and different mechanisms. The right one (or combination) depends on what is actually happening in your skin and what you want to address.
Medical-grade skincare and topical resurfacing. The foundation of any skin plan. Retinoids, vitamin C, growth-factor serums, and SPF do real work over time, especially in the youthful and early-photoaging ranges. Often paired with a series of chemical peels for accelerated turnover.
Microneedling. Mechanical needling that remodels collagen in the upper dermis, where the SLEB lives. Often the single most effective intervention for the 10 to 20% range, and the foundation of many combination plans in the moderate range.
RF microneedling. Adds radiofrequency energy to the needling, reaching slightly deeper and producing a stronger remodeling response. A good option for patients with skin laxity, more advanced photoaging, or anyone who wants a more aggressive result.
PRP, PRF and PDGF. Your own platelet-derived growth factors, layered into microneedling or RF microneedling to amplify the healing response. PRF (the spun-fibrin version) releases growth factors over a longer window than PRP. PDGF preparations are a newer, concentrated option that some patients prefer.
Exosomes. Cell-signaling vesicles applied topically after microneedling or RF microneedling. The research is still emerging, but in our experience they reduce downtime and seem to enhance the collagen response in many patients.
Biostimulators (Sculptra, Radiesse). Injectables that stimulate your own collagen production over months. Sculptra in Sandy, UT works deep in the dermis and subcutis to gradually rebuild structural collagen. Radiesse adds immediate lift plus collagen stimulation. Both are useful when the loss of dermal volume and structural collagen is the dominant story, especially in the moderate-to-advanced range.
In practice, plans are rarely one treatment. A patient in the early range might do skincare plus a series of microneedling-with-PRF. A patient in the moderate range might add RF microneedling with PDGF and a course of Sculptra. The point of the assessment, whether ultrasound or a careful visual exam, is to pick the right combination rather than reaching for whatever is most popular that month.
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Why we measure when we measure
The SLEB measurement gives us a number we can re-measure in three months, six months, a year. For patients who want to track whether a treatment series is actually working, the number moves, or it does not.
This is part of how we operate as an integrative med spa in Utah, where skin care lives alongside hormones, sleep, inflammation, gut health, and stress. The treatments we recommend are part of a larger picture. Ultrasound, when we use it, lets us see one piece of that picture more clearly.
Frequently Asked Questions
Do I need an ultrasound to get microneedling at Nervana?
No. The ultrasound is one assessment tool, used when a patient or the clinical situation calls for it. Most patients move forward with a thorough consult and a treatment plan based on the visual exam and history. The ultrasound is available when an objective baseline adds value, especially for patients planning a longer treatment series.
Does the ultrasound scan hurt?
Not at all. It is the same kind of probe used in pregnancy and dermatology, completely non-invasive. We apply a thin layer of ultrasound gel, glide the probe across the area for less than a minute, and capture a still image to measure. No needles, no discomfort, no downtime.
Can microneedling actually change the SLEB ratio?
Yes, that is the point of measuring it for patients who want a baseline. Microneedling remodels collagen in the upper dermis, which is the same layer the SLEB lives in. A re-scan at 60 to 90 days post-treatment often shows measurable improvement, particularly for patients in the early-to-moderate range over a series of three to six sessions.
How do I know which treatment is right for me?
That is the conversation we have at your consult. Some patients are clearly in the skincare-plus-microneedling lane; others need biostimulators, RF microneedling, or a combination. The right answer depends on your skin, your goals, your downtime tolerance, and your budget. We will lay out the options and walk through the trade-offs.
Are exosomes and PDGF actually worth it?
They can be, especially when added to microneedling or RF microneedling for patients who want to maximize the healing response, improve collagen stimulation or reduce downtime. The research is still maturing, so we describe them honestly: a promising add-on that many patients respond well to, not a guaranteed game-changer depending on what biologic is used where and how it is applied as well as how often. We will tell you when they are likely to help and when a simpler plan is enough.
Book a Consultation in Sandy, UT
If you are considering microneedling, biostimulators, PRP, or any other skin treatment and you want a plan built around what your skin actually needs, we would love to see you. Book a consultation and we will walk through the options, talk through what makes sense for your skin, and bring out the ultrasound if it would help the conversation.
If you’re an aesthetic injector with the Clarius Ultrasound- Follow us on Instagram @nervanamedical for more advice on how to obtain these images!
On this page
- The layer between your epidermis and dermis
- What the SLEB number actually means
- When ultrasound skin assessment helps and when it doesn’t
- Microneedling, biostimulators, and beyond
- Why we measure when we measure
- Frequently Asked Questions
- Book a Skin Consultation in Sandy, UT
