DORIS DAY MD SKINCARE

Re-Q Pro-longevity Face Serum

Regular price $249.00
Regular price Sale price $249.00

DORIS DAY MD SKINCARE

Re-Q Pro-longevity Face Serum

Regular price $249.00
Regular price Sale price $249.00
First-of-its kind formula powered by RLX-201 technology

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.

What is RLX-201: a patented pro-longevity molecule in Re-Q face serum that helps rebalance skin cell function
RLX-201 is designed for long-term skin performance, not just short-term surface change.

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.

Skin cell longevity timeline showing healthy, exhausted and senescent fibroblasts, with a cellular longevity zone that extends how long skin cells stay healthy
Healthy, active skin cells for longer: RLX-201 is designed to help reset exhausted fibroblasts and extend their cellular longevity zone.

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
Re-Q Pro-Longevity Face Serum clinical study: improvements in skin firmness in as early as 2 weeks
Firmness improved in as early as 2 weeks in the 12-week clinical study.

What participants said

  • 86% reported visibly hydrated skin, enhanced radiance and improved texture
  • 86% said they would recommend the product
86% of Re-Q study participants agreed their skin felt more nourished after 12 weeks
86% agreed their skin felt more nourished after 12 weeks (patient-reported, N=29).

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.
Re-Q Pro-Longevity Face Serum dispensed from the pump onto a fingertip, showing the lightweight serum texture
One to two pumps, morning and night, as your first step.

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

Behind the Science

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

Why it's Special

RLX-201 is a patented longevity molecule developed by top skin scientists to help reset your skin. It acts like a master switch to reset and rebalance exhausted skin. Paired with protective botanicals and antioxidants, this formula resets cells to recover skin’s firmness and maximize the benefits other skin care actives and treatments. Resets Skin's Cellular Function, Recovers Skin's Strength, Revives Youthful Radiance

What to Expect

Pro-Longevity Face Serum With RLX-201 Powered by the patented molecule RLX-201, this breakthrough serum promotes healthier, longer-lasting skin by helping cells reset, repair, and renew to sustain their youthful performance. A true innovation in pro-longevity science, this serum helps restore balance and vitality at the cellular level.

How to Use

Apply 1-2 pumps morning and evening to face.

Ingredients

  • 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.
Supporting Ingredients: Water/Aqua, Propanediol, Propanediol Dicaprylate/Caprate, Coconut Alkanes, Cetearyl Olivate, Ethoxydiglycol, Sorbitan Olivate, Dioxothiazetidinyl Demethoxyrapamycin (RLX-201), Lepidium Sativum Sprout Extract, Sophora Japonica Extract, Tetrahydrodiferuloylmethane, Artocarpus Lakoocha Wood Extract, Sodium Hyaluronate, Betaine, Synthetic Fluorphlogopite, Ammonium Acryloyldimethyltaurate/VP Copolymer, Coco-Caprylate/Caprate, Xanthan Gum, Caprylhydroxamic Acid, Trisodium Ethylenediamine Disuccinate, Glycerin, Lecithin, Citric Acid, Hydroxyacetophenone, Potassium Sorbate, 1,2-Hexanediol, Phenoxyethanol 

Questions? We’ve Got Answers.

See the transformative results our users have experienced

Before
Before
After
After
Before
Before
After
After

Customer Reviews

Based on 14 reviews
79%
(11)
14%
(2)
7%
(1)
0%
(0)
0%
(0)
D
Dawn
Req serum

I have been using for 2 weeks and am pleased with the results. I see improved texture and lightening of my brown spots. I do have some acne since starting Req but hope once my skin gets adjusted the breakouts will settle down.

d
donna walker
Best product ever

Absolutely love this product. Starting purchasing in January 2026 and have been using morning and night ever since I received my first bottle. I have drawers of products at home that don't deliver but this one does. It is absolutely the best product ever.

S
Susan Behringer
75 year old female

I have always taken an interest in skincare. I worked in a Dermatology practice before retirement. Re Q has made my skin have more of a "glow" and plumpness. I used it on one side of my face for two weeks which convinced me to order more of the product. To those interested you should try this new pathway for your best face forward!

E
Ed Fox
Re-Q is Phenomenal!

I’ve had actinic “senile” purpura on my forearms for years. My skin was delicate and I would cut easily. I’d get giant purple blotches from brushing against anything. I’ve tried everything to get rid of them with no success. I saw Dr. Day and she suggested using Re-Q on my forearms twice a day. I’ve been using Re-Q for 9 months now and I will never stop! Not only did the giant purple blotches disappear but my forearms are soft to the touch instead of leathery and I’m growing hair for the first time in 20 years! This product is a game changer! I can now walk around in short sleeves proudly again. Thank you Dr. Day!!!

d
donna walker
Best product I have ever used

my skin has improved significantly since I've been using RE-Q. It is very smooth and has been a very big difference in the wrinkle texture under my eyes. Will continue to purchase, on my third bottle and it is has exceeded my expectations.

Get Personalized Advice from Dr. Doris Day

We offer a full array of medical and non-surgical aesthetic treatments for face and body.

Contact Us

Direct Book: (212) 772-0740