RoC Skincare is using identical female twins and Oura Ring wearables to study how daily lifestyle factors such as sleep and stress relate to visible skin aging and to responses to its Patented Clinical Retinol. The company has completed a pilot phase that it says validated the twin model and is now preparing a larger study.
The rationale rests on genetics. Identical twins share DNA and much of their early environment, so differences in how their skin ages are more likely to reflect lifestyle, environment or product use. Art Pellegrino, RoC’s chief scientific officer, said the pilot was designed to test whether this approach could provide a more precise way to examine the drivers of visible skin aging. According to the company, it did.
In the pilot, RoC reported that twins using a placebo 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. Those results are the company’s account of its own study and do not establish how retinol performs across the wider population.
The next phase is intended to separate lifestyle influences from genetic ones more directly. RoC is recruiting 30 pairs of adult female identical twins aged 40 and older who live in the United States. Participants will follow a regimen for 12 weeks. The company expects results by mid-2027.
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 plans to combine that biometric data with clinical skin measures. Pellegrino said wearables give the industry a way to account for how people live when recommending skin care.
The design also addresses a practical limitation. Researchers cannot ensure that twins have identical sun exposure, diets or other external influences. RoC is therefore recruiting twins with similar levels of environmental damage where possible and tracking sleep and stress closely during the study.
That allows comparisons within each pair. If one twin sleeps poorly or reports more stress, researchers can examine whether her skin responds differently to the regimen than her sister’s. RoC says it will look at whether stretches of poor sleep align with lower hydration readings, or whether the twin with lower stress sees fine lines improve faster.
The company is also interested in the reverse relationship: whether participants who see visible skin improvements report feeling less stressed. That question is framed as an area of interest, not a confirmed outcome.
Skin assessments use expert grading, digital photography, corneometer readings and participant self-assessment. RoC says findings will inform how it develops products for skin longevity and how it designs future clinical studies.