When skin is measured in physical quantities, baseline pigmentation becomes part of the measurement, rather than something the method has to adjust for.
SIAscopy™ starts with a different measurement principle: chromophores are reported as quantities. Using the way light is absorbed and scattered in skin, SIAscopy™ derives quantitative concentrations of melanin, hemoglobin and collagen rather than describing skin through appearance scores, color coordinates or category labels.
That distinction matters because the output is a physical quantity. The same measurement principle applies to every participant, regardless of baseline pigmentation. Skin tone is not something the method has to adjust for. Melanin is itself one of the quantities being measured.
For sponsors and CROs, quantitative measurement creates a common scale that can be used across participants, visits, sites and populations. Researchers can follow changes in a specific chromophore over time and evaluate those measurements within the same framework, regardless of where an individual participant started.
It also allows melanin and hemoglobin to be reported as distinct endpoints. Rather than treating skin as a single visual impression, researchers can examine the biological components contributing to what is happening beneath the surface.
This has important implications for inclusive clinical research. When the measurement itself is designed to quantify the underlying biology, inclusion across a range of skin tones becomes a property of the measurement approach rather than a separate claim that has to be layered onto it.
The optical basis for this approach is central to SIAscopy™. Its chromophore outputs are derived from the interaction of light with skin tissue, allowing melanin and hemoglobin to be quantified independently. That means pigmentation is captured as data within the measurement itself rather than used to place a participant into a category before measurement begins.
There is also supporting evidence for the melanin measurement. In vivo SIAscopy™ melanin readings have been compared with biopsy-derived measurements in a participant group spanning diverse skin pigmentation, demonstrating a strong relationship between the optical measurement and tissue melanin content.
That evidence should also be viewed in the appropriate context. The biopsy comparison comes from a single program-affiliated research group and has not yet been independently replicated. We therefore view it as supportive evidence rather than definitive validation, with independent replication an important next step.
The broader principle is straightforward: when skin biology is reported quantitatively, researchers have a common measurement framework that can follow biological change across participants and populations. Melanin, hemoglobin and collagen become measurable endpoints, with baseline pigmentation captured as part of the data.
For sponsors and CROs designing studies across increasingly diverse populations, that creates an opportunity to build inclusion into the measurement strategy from the start.
SkinSecure™ brings SIAscopy™ technology into clinical research, giving sponsors and CROs access to objective, quantitative skin biomarker data including melanin, hemoglobin and collagen. Learn more about SkinSecure here.