DORIS DAY MD SKINCARE
Re-Q Pro-longevity Face Serum
DORIS DAY MD SKINCARE
Re-Q Pro-longevity Face Serum
Longevity skincare powered by RLX-201, for skin that looks firm, radiant and rested.
Some of my favorite moments in practice are when a patient catches her reflection and says, "My skin looks so rested." Re-Q Pro-Longevity Face Serum is the longevity skincare step I reach for to help skin keep looking that way. It's powered by RLX-201, a patented pro-longevity molecule that works deep within the skin to support cellular balance and your skin's natural ability to repair. The formula is lightweight, made for daily use and suitable for all skin types.
What excites me most is the evidence. In a 12-week, randomized, double-blind, vehicle-controlled study published in the Journal of Cosmetic Dermatology, the RLX-201 formula in Re-Q improved skin firmness significantly more than the vehicle as early as week 2, with continued improvement through week 12.
I'm a co-founder of Rapalogix, the company behind Re-Q.
Why I love Re-Q
- Firmness. Boosts dermal strength and elasticity.
- Radiance. Visibly enhances radiance and tone.
- Lift. Visibly improves skin lift and contour.
- Studied. Backed by double-blind, vehicle-controlled clinical data, with no adverse events reported.
- Simple. 1 to 2 pumps, morning and night, as the first step of your routine.
How Re-Q longevity skincare works
The structure of your skin is maintained by fibroblasts. Over time, and faster with environmental and biological stressors, these cells can become exhausted and lose function, long before you see visible signs of aging.
RLX-201 works deep within the skin to help reset exhausted fibroblasts toward their youthful, active state, so they can recover, repair and do what they were designed to do. I think of Re-Q as a reset button for your skin's cellular function.

It does this through TORC1, a nutrient-sensing pathway that acts as a central regulator of the hallmarks of aging. RLX-201 is designed to selectively modulate TORC1 activity in the skin to restore cellular balance and support long-term skin health. Rather than focusing only on surface symptoms, it targets the biological drivers of skin aging.

The science and the RLX-201 clinical study
I always look for objective, measurable data from well-designed clinical studies before I recommend anything, and I hold Re-Q to the same standard. I'm also one of the authors of the published study.
The study
- 12 weeks, randomized, double-blind and vehicle-controlled, published in the Journal of Cosmetic Dermatology
- 45 women ages 35 to 65 with moderate-to-severe facial photoaging, across Fitzpatrick skin types I to VI
- Participants applied either the RLX-201 formula found in Re-Q or a matching vehicle, twice daily
What the investigators measured
- Firmness: significantly better than vehicle as early as week 2, with continued improvement through week 12
- At week 12, from baseline: firmness and cheek wrinkles improved by 21%, and sagging, orbital elasticity and skin tone by 14%
- Skin quality at week 12: texture improved by 40%, radiance by 39% and luminosity by 38%
- Measured elasticity: elastometry showed significant improvement in the skin's viscoelastic properties, peaking at week 8 and sustained through week 12

What participants said
- 86% reported visibly hydrated skin, enhanced radiance and improved texture
- 86% said they would recommend the product

Tolerability: both formulas were well tolerated, with no adverse events reported.
In the lab: in full-thickness human skin models from three donors, RLX-201 reduced a marker of TORC1 activity (pRPS6) by an average of 91.7%.
Where RLX-201 comes from: Re-Q isn't rapamycin itself. Rapalogix's approach builds on decades of research into rapamycin and the TOR pathway, which made selective TORC1 modulation possible, and RLX-201 applies that breakthrough to skin health.
Ingredients in Re-Q Pro-Longevity Face Serum
- RLX-201. The proprietary pro-longevity molecule, at the core of the formula, engineered to restore cellular balance and rejuvenate function at the source.
- Purified turmeric root extract. Combats oxidative stress and promotes cellular repair.
- Resveratrol-derived antioxidant. Restores cellular energy balance.
- Swiss garden cress sprouts extract. Boosts skin's natural detoxification and defense systems.
How to use Re-Q
- Apply 1 to 2 pumps to clean, dry skin, morning and night.
- Make it your first treatment step, before any other serums or moisturizer. The lightweight formula absorbs quickly, so the rest of your routine layers on top.
- Using a retinol at night? Apply Re-Q first, then your retinol.

Who Re-Q is for
Re-Q is designed for daily use and suitable for all skin types. It's a professional-grade serum built on longevity science, for anyone who wants skin that looks firm, smooth and radiant over time. If you have in-office treatments, it's designed to complement your procedures and help maintain results between visits.
Re-Q questions, answered
Is Re-Q a rapamycin serum?
Not exactly. RLX-201 isn't rapamycin. It builds on decades of research into rapamycin and the TOR pathway, and it's designed to selectively modulate TORC1 activity in the skin to restore cellular balance.
Can I use Re-Q with a retinol?
Yes. You can pair Re-Q with a retinol in your nighttime routine. Apply Re-Q first, then your retinol.
Where does Re-Q go in my routine?
First. Apply it to clean, dry skin before any other serums or moisturizer, morning and night.
How soon might I notice a difference?
In the clinical study, firmness improved significantly more than with the vehicle as early as week 2, and results kept improving through week 12. Consistent twice-daily use is what was studied.
Is Re-Q right for my skin type?
Re-Q is suitable for all skin types. The study included women across Fitzpatrick skin types I to VI, and the formula was well tolerated, with no adverse events reported.
Can I use Re-Q alongside in-office treatments?
Yes. Re-Q is designed to complement in-office procedures and help maintain results between visits.
Anti-aging
Paraben Free
Fragrance Free

Why Dr. Day Loves It
The clinical study: RLX-201 was tested in a 12-week, double-blind, vehicle-controlled clinical study of 45 women. Compared with the vehicle, RLX-201 improved measures of skin health, skin biomechanics and the integrity of the extracellular matrix, the support structure of skin
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