Why Depth is Where the Change Happens

Beyond the Surface is an educational series from MedX Health exploring the science behind objective skin measurement. Throughout this series, we'll examine the technologies, methodologies, and research principles shaping the future of skin health, from biological measurement and longitudinal analysis to data integrity, clinical endpoints, and evidence generation.Our goal isn't to promote a product. It's to contribute to the broader conversation about how objective measurement can help researchers generate stronger evidence, improve study design, and better understand skin biology over time.

For as long as skin has been studied in a clinical setting, most of what gets recorded is what sits on top. Photography, color grading, and visual assessment all capture the surface, the light the skin returns to a camera or an observer. That surface tells you something real. It just does not tell you what is happening underneath it. 

Skin is layered. The epidermis is the thin outer sheet that most surface methods can reach. Below lies the dermis, where the structural and pigment biology that drives long-term change actually lives. Collagen sits in the dermis. Pigment can settle there too. The changes that follow from aging, sun exposure, and tissue remodeling begin below the surface, often well before they become visible at the top. 

This is the gap that objective measurement is built to close. Rather than asking what the skin looks like, it asks ‘what has changed beneath the surface since the last visit. 

SkinSecure™ was developed around that question. Using the SIAscope V-CRE, non-invasive scans are resolved to a sub-dermal depth of approximately 2 mm. That depth is a deliberate target rather than a limit. It captures the epidermis and the papillary dermis, the zone where changes from topical actives, sun exposure, and tissue remodeling are expected to appear first. Reaching deeper is not automatically better for a measurement designed to track those specific changes. 

At that depth, the platform resolves three chromophores, the light-absorbing components of skin: collagen, melanin, and hemoglobin. It also reports a dermal-melanin output that registers only where pigment sits in the dermal layer, for example in a pigmented lesion, and reads near zero in normal skin. Each is measured directly from how skin absorbs and scatters light, not inferred from surface color. 

The principle underneath all of this is simple, and it runs through everything we publish. SkinSecure measures; the researcher interprets. The platform reports how a value moved from one visit to the next. What that change means clinically is the research team's conclusion, supported by objective numbers rather than subjective grading. 

That division of labor is also what lets a sponsor stand behind a bolder claim. A subjective grade is one assessor's judgment, and a reviewer can push back on it. A quantified value measured on a consistent scale is far harder to argue with. Because the platform reports change as an objective number rather than an opinion, the conclusions a research team draws from it can be stronger and easier to defend on submission. SkinSecure does not make the claim; it supplies the objective evidence a strong claim rests on. 

Depth is where that story starts. Of the three chromophores measured beneath the surface, one has become the measurement the whole field is chasing. That is collagen, and it is where this series goes next. 

Stay tuned for part 2 in August. To learn more about SkinSecure, or to request a demo, visit here.