RoC Skincare is advancing a twin-based clinical research program that combines retinol testing with wearable biometrics. The company says it is testing its patented clinical retinol on adult female identical twins and pairing clinical skin assessments with lifestyle data from Oura Rings.
The pilot study was designed to test whether identical twins offer a more precise model for studying visible skin aging, according to Art Pellegrino, chief scientific officer. Because identical twins share DNA and much of their early environment, differences between them are less easily attributed to genetics, he says. That makes it easier to examine what the retinol is doing on skin, and whether lifestyle or environment explains divergent aging patterns.
Pellegrino reports that the pilot produced a clear answer on the model. In the placebo group, twins had similar or worse signs of aging at the end of the study, while those in the treatment group showed improvement of 20% or more within four weeks, according to the company.
The pilot did not attempt to quantify how much skin aging stems from genes and how much from lifestyle. That is the focus of the expanded study, which is intended to show how daily life, including sleep and stress, can change the picture when genetics is held constant.
For the next phase, RoC is working to recruit 30 pairs of adult female identical twins aged 40 and older living in the US. Participants will use a regimen for 12 weeks, and RoC expects results by mid-2027. The company says the focused group is intended to produce cleaner data for a longer research program on “skin span,” or how long skin keeps looking its best.
Throughout the study, participants are asked to wear an Oura Ring, which tracks health and wellness metrics including sleep, stress, heart rate, heart rate variability and temperature trends. RoC will pair those biometric readings with standard clinical skin measures: expert grading, digital photography, corneometer readings and participant self-assessment.
Pellegrino says wearables create an opportunity to consider how people live when recommending skin care. Because researchers cannot guarantee identical external influences such as sun exposure or diet, RoC is recruiting twins with similar levels of environmental damage where possible and monitoring sleep and stress closely.
With genetics held constant, the brand hopes to quantify external stressors and observe how they relate to skin changes. For example, it wants to compare twins when one sleeps poorly or reports more stress, and see whether her skin responds differently to the regimen. It also plans to examine whether weeks of poor sleep align with lower hydration readings, or whether the twin with lower stress sees fine lines improve faster.
RoC is also interested in the reverse question: whether visible skin improvements affect how stressed participants feel. The company says findings will inform how it develops products for skin longevity and designs future clinical studies.