Begin clean.
Remove sunscreen, makeup, sweat and the visible residue of the day before asking a treatment formula to remain in contact.
Your Nighttime Skincare should be Designed Differently.
The hours between cleansing and morning.
We believe nighttime skincare should be designed differently. Not because night is magic, but because skin keeps time, its barrier changes across the day, and an evening formula enters a different practical context: cleansed skin, fewer environmental demands, and hours of uninterrupted wear.
Night does not switch skin from “off” to “repair.” The science is more precise, and more interesting.
01 / Skin Keeps Time
Skin has a clock of its own.
Human epidermis is not biologically identical at every hour. A population study combining repeated samples from 20 people with single samples from 219 more found a robust circadian oscillator and hundreds of rhythmically expressed genes in human epidermis.[2]
The practical meaning is restraint, not mythology: responses connected with water loss, cell proliferation and DNA repair follow daily programs. “Nighttime” is therefore a real biological context, but no single hour owns every repair process, and human timing should not be inferred from nocturnal-animal studies.
- 298
- human epidermis samples reconstructed across circadian phase
- ≈24h
- a peripheral clock expressed in the skin, not only the brain
02 / The Barrier by the Clock
Evening skin holds a different water-loss state.
In a 24-hour human study, 16 healthy volunteers were measured every two hours. Transepidermal water loss, surface pH and skin temperature showed significant time-dependent rhythms; the authors concluded that permeability was higher in the evening and night than in the morning.[3]
A wider review likewise found TEWL higher in the afternoon and evening, while skin blood flow was lowest in the morning, highest in the afternoon and showed a second peak just before sleep.[1] The body is also turning toward heat loss as it prepares for sleep.
03 / Sleep Is Part of the Skin Environment
A nighttime formula cannot replace a night of sleep.
In an observational study of 60 women, good sleepers showed 30% greater barrier recovery 72 hours after tape stripping than poor sleepers. The study found association, not proof that sleep alone caused every observed difference.[4]
A separate controlled model restricted healthy adults to two hours of sleep per night for 72 hours. Barrier recovery after an experimental wound took 5.0 days under restriction versus 4.2 days after adequate sleep.[5]
The honest product implication is simple: formulate for the evening window, but never imply that skincare substitutes for sleep, repairs circadian disruption, or performs the body’s biology on its behalf.
- 30%
- greater 72-hour barrier recovery in good sleepers in one observational study
- +0.8d
- longer barrier restoration in one controlled sleep-restriction model
What nighttime design can honestly do.
Choose one job.
Use the formula that fits the night: targeted peptide care, measured retinol, a long-contact hydrogel or a light conditioning mist.
Balance the active.
Pair potency with humectants, emollients and comfort-supporting ingredients so consistency is built into the formula.
Give it time.
Design texture and format for the hours available between cleansing and morning, rather than adding decorative steps.
Research basis
These sources describe skin and sleep biology. They are not finished-product evidence for Lepique.
- [1] Matsui et al. Biological Rhythms in the Skin. Int J Mol Sci. 2016.
- [2] Wu et al. Population-level rhythms in human skin with implications for circadian medicine. PNAS. 2018.
- [3] Yosipovitch et al. Time-dependent variations of the skin barrier function in humans. J Invest Dermatol. 1998.
- [4] Oyetakin-White et al. Does poor sleep quality affect skin ageing? Clin Exp Dermatol. 2015.
- [5] Smith et al. Impact of sleep restriction on skin barrier restoration. J Appl Physiol. 2018.
Four products, four night-time jobs.
Designed for the hours that belong to you.
Discover the first formulaQuestions about the night, answered.
How do I start retinol at night?
A beginner-friendly way to bring 0.1% retinol into an evening routine.
Read the guideWhy is my retinol night cream turning yellow?
Why pure retinol changes color over time, and why performance stays the same.
Read the guidePeptide eye cream or retinol for the eye area?
When a retinol-free, peptide-led eye cream makes more sense.
Read the guideHow do I use a hydrogel collagen mask in my night routine?
Where a 42g hydrogel mask fits, how long to wear it and what to do after.
Read the guideWhat is a hypochlorous acid face mist and how do I use it?
What HOCl does in a cosmetic mist and when to reach for it.
Read the guideWhat order should my nighttime skincare go in?
Lightest to richest: a simple order for an evening routine.
Read the guide