RoC Skincare is testing its Patented Clinical Retinol in adult female identical twins, pairing clinical skin measurements with biometric data from Oura Rings. The company says the approach is designed to separate the effects of lifestyle and environment from those of genetics when studying visible skin aging.
The work began with a pilot study that RoC describes as a test of the model itself. Art Pellegrino, the brand's chief scientific officer, says the pilot asked whether identical twins could provide a more precise way to study what drives visible skin aging. According to Pellegrino, the answer was yes.
Why identical twins
Because identical twins share DNA and much of their early environment, researchers can more confidently attribute differences in skin aging to lifestyle factors or products, rather than to genetic variation. Pellegrino describes identical twins as close to a natural control: if their skin ages differently, lifestyle and environment become more likely explanations.
RoC says the pilot also produced early efficacy signals. Pellegrino reports that twins in the treatment group had at least 20% improvement after four weeks, while twins in the placebo group had similar or worse signs of aging at the end of the study. Those results come from a pilot; the larger study is intended to examine how daily life, including sleep and stress, changes the picture when genetics are held constant.
The next phase is recruiting 30 pairs of adult female identical twins aged 40 and older who live in the United States. Participants will use the regimen for 12 weeks. RoC expects results by mid-2027 and frames the work as one stage in a longer research program on extending skin span, or how long skin keeps looking its best.
Wearables enter the protocol
Throughout the study, twins are asked to wear an Oura Ring, a wearable device that tracks health and wellness metrics during the day. The data capture variations in sleep, stress, heart rate, heart rate variability and temperature trends.
Pellegrino says wearables are creating an opportunity to factor in how people live when recommending skin care. RoC cannot ensure that twins have identical external influences, such as sun exposure or diet, so it is recruiting twins with similar levels of environmental damage where possible and tracking sleep and stress closely during the study.
With genetics held constant and lifestyle data tracked directly, the brand expects to examine how stressors relate to changes in each participant's skin. If one twin sleeps poorly or reports more stress, researchers can compare whether her skin responds differently to the regimen than her sister's. They may also look at 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 the reverse question: whether participants who see visible skin improvements feel less stressed. Its standard clinical skin measures include expert grading, digital photography, corneometer readings and subject self-assessment.
Pellegrino says what RoC learns will shape how it develops products for skin longevity and how it designs future clinical studies.