RoC Skincare is moving into a larger clinical study that uses identical twins and wearable biometric data to examine how its patented clinical retinol affects visible skin aging. The company is recruiting 30 pairs of adult female identical twins, aged 40 and older and living in the United States, for a 12-week phase.
The design rests on a simple premise: because identical twins share DNA and much of their early environment, differences in skin aging are more likely to be tied to lifestyle, environment or product use. Art Pellegrino, RoC's chief scientific officer, said the pilot was intended to prove whether this model could provide a more precise way to study visible skin aging. According to the company, it did.
What the pilot found
RoC says twins in the placebo group showed similar or worse signs of aging by the end of the pilot. Those in the treatment group, by contrast, showed improvement of 20% or more in four weeks. The company cites the outcome as support for using identical twins to study visible skin aging.
Pellegrino said the pilot did not attempt to quantify how much skin aging comes from genetics versus lifestyle. That question is reserved for the expanded study, which is intended to examine how daily factors such as sleep and stress change the picture when genetics are held constant.
Wearables added to clinical grading
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 plans to compare that biometric data with clinical skin measures and with each twin's response to the regimen.
The company says the combination could allow researchers to see whether stretches of poor sleep line up with lower hydration readings, or whether the twin with lower stress improves faster in fine lines. RoC is also interested in the reverse question: whether visible skin improvements affect participants' stress levels.
Pellegrino acknowledges that external influences cannot be perfectly matched. To reduce that limitation, RoC is recruiting twins with similar levels of environmental damage where possible and tracking sleep and stress throughout the study.
Skin assessments include expert grading, digital photography, corneometer readings and participant self-assessment, according to the company. Those measures are designed to capture changes in the signs of skin aging.
Study scope and timing
The expanded phase focuses on at least 30 pairs of women aged 40 and older in the United States who will use the regimen for 12 weeks. RoC describes the group as deliberately focused in order to generate cleaner data, and positions the work as one stage in a longer research effort on prolonging the period in which skin appears at its best.
The company expects results from the twin study by mid-2027. Pellegrino said the findings will shape how RoC develops products for skin longevity and designs future clinical studies.