RoC Skincare is testing its Patented Clinical Retinol in adult female identical twins, pairing clinical skin measurements with lifestyle data collected by Oura Rings. The company says the approach is intended to make the effect of daily habits such as sleep and stress easier to distinguish when genetic differences are held constant.
Art Pellegrino, RoC’s chief scientific officer, says identical twins offer an unusually strong research model because they begin with the same genetic starting point. Differences between them are therefore harder to attribute to genetics and easier to link to lifestyle, environment or product use. He describes identical twins as close to a natural control.
From pilot to expanded study
RoC says its pilot twin study was intended to establish whether the model could provide a more precise way to study visible skin aging. According to Pellegrino, the answer was yes. The pilot also produced early signals: twins in the placebo group had similar or worse signs of aging at the end of the study, while twins in the treatment group showed 20% or more improvement in four weeks, he says. Those are company-reported pilot observations, not proof of a general anti-aging effect.
The pilot did not attempt to quantify how much skin aging stems from genes versus lifestyle; RoC says the expanded phase is meant to examine that question. The brand is now recruiting 30 pairs of adult female identical twins aged 40 and older in the United States. Participants will use the regimen for 12 weeks. Pellegrino says the focused group is intended to produce cleaner data and represents one stage in a longer research program on extending the time skin keeps looking its best.
Wearables alongside clinical grading
Throughout the study, twins are asked to wear an Oura Ring, a wearable device that tracks health and wellness metrics. RoC plans to capture variations in sleep, stress, heart rate, heart rate variability and temperature trends. The company will compare those biometric patterns with standard clinical skin measures: expert grading, digital photography, corneometer readings and participants’ self-assessment.
Because twins cannot be guaranteed identical external influences such as sun exposure or diet, RoC says it is recruiting pairs with similar levels of environmental damage wherever possible and monitoring lifestyle factors closely. Pellegrino says the combination of twin controls and wearable tracking should allow researchers to examine how stressors relate to changes in each participant’s skin. For example, the study may show whether weeks of poor sleep line up with lower hydration readings, or whether the twin with lower stress sees fine lines improve faster. RoC is also interested in whether visible skin improvements leave participants feeling less stressed.
The company expects the twin study results by mid-2027. Pellegrino says what RoC learns will shape how it develops products for skin longevity and designs future clinical studies. More broadly, he sees wearables creating an opportunity to factor real-world living conditions into skincare recommendations.