RoC Skincare is using identical twins and wearable biometric tracking to test how much of visible skin aging reflects daily habits rather than genetics, as it evaluates its Patented Clinical Retinol.
The brand has finished a pilot twin study and is recruiting 30 pairs of adult female identical twins aged 40 and older in the US for a 12-week phase. Participants wear an Oura Ring, a wearable that logs sleep, stress, heart rate, heart rate variability and temperature trends, while researchers collect standard clinical skin measures.
Twins as a built-in control
Chief scientific officer Art Pellegrino told Personal Care Insights that when two people begin with the same genetic blueprint, differences between them are harder to attribute to genetics, which makes it easier to see what the retinol is doing on the skin. He described identical twins as close to a natural control: if their skin ages differently, lifestyle and environment become the more likely explanation.
What the pilot showed
According to Pellegrino, twins in the placebo group had similar or worse signs of aging at the end of the pilot, while those in the treatment group showed as much as, or more than, 20% improvement in just four weeks.
He framed the pilot's purpose narrowly: proving whether identical twins could offer a more precise way to study what drives visible skin aging, which he said they could. The pilot did not attempt to measure how much skin aging comes from genes versus lifestyle; that question belongs to the expanded study.
Wearables alongside clinical grading
- Lifestyle tracking: Oura Ring data on sleep, stress, heart rate, heart rate variability and temperature trends, compared between twins across the study.
- Skin assessment: expert grading, digital photography, corneometer readings and participant self-assessment.
- Recruitment: 30 pairs of women aged 40 and over in the US, using the regimen for 12 weeks, with the brand seeking twins who have similar levels of environmental damage where possible.
Because matching genetics removes the question of whether a difference is inherited, and the ring records lifestyle parameters directly, RoC expects to quantify external stressors and connect them to each participant's skin. Pellegrino's examples include checking whether weeks of poor sleep line up with lower hydration readings, or whether the twin under less stress sees fine lines improve faster. The brand is also looking at the reverse direction: whether visible skin improvement leaves participants feeling less stressed.
Timeline and open questions
RoC expects results from the twin study by mid-2027. Pellegrino said the findings will shape how the company develops products for skin longevity and designs future clinical studies, describing the work as one stage in a longer research program on how long skin keeps looking its best.
The improvement figures reported so far come from RoC's own pilot, and the balance between genetic and lifestyle contributions remains unmeasured until the larger phase reports. Because identical twins cannot be guaranteed identical sun exposure or diets, the brand is controlling for those variables through recruitment and continuous lifestyle tracking rather than by holding them constant.