4.9 · 2,300+ verified rituals

One serum. Twenty-eight nights. Visible renewal.

Name: SOLENNE Le Sérum Nº 1
Brand: SOLENNE
Price: 128 USD
Availability: InStock

Le Sérum Nº 1 replaces the ten-step shelf with a single nightly step: plant-derived bakuchiol, copper peptides and olive squalane, pressed into one small-batch amber bottle. No retinol irritation. No guesswork.

Begin the ritual · from $128

60-day empty-bottle guarantee
Free shipping · Ships within 48 hours

Le Sérum Nº 1 amber glass bottle on a travertine plinth

28 nights The length of one full skin renewal cycle. That is the promise window.

Dermatologist reviewed
Vegan & cruelty free
Made in small batches
Free worldwide shipping
60-day guarantee

A woman applying a drop of serum to her cheek in soft morning light

Why routines fail

The ten-step routine was the problem.

Most shelves are a museum of half-finished promises. Actives that cancel each other out. Retinol that inflames for weeks before it improves anything. A different miracle every month, and skin that never gets a quiet stretch to actually renew.

Skin does its deepest repair at night, on a cycle of roughly four weeks. It does not need more products. It needs one uninterrupted signal, repeated until the cycle completes.

"I gave it one honest month and threw out four serums after. My skin just looks like it sleeps well now." Mara V. · Verified ritual, 8 weeks

Inside the bottle

Three actives. One renewal window.

Every ingredient earns its place by doing one job inside the 28-night cycle, at the concentration the research points to. Nothing decorative, nothing in trace amounts for the label.

1.2%

Bakuchiol

The plant-derived retinol alternative. Drives surface renewal and refines texture without retinol's irritation curve, so you never skip a night.
2%

Copper peptides (GHK-Cu)

The firmness signal. Supports the look of density and bounce where skin has started to read tired.
8%

Olive squalane

The seal. Mirrors skin's own lipids to lock the barrier overnight, so the actives work instead of evaporating.

Still life of bakuchi botanicals, copper peptide vial and squalane droplets

Close-up of luminous, healthy skin in golden light

Night 07

The calm sets in.

Tightness and reactivity ease first as the squalane reseals the barrier. Skin stops fighting and starts drinking. Nothing stings, which is exactly the point: renewal only happens on nights you do not skip.

Night 14

The texture turns.

Bakuchiol's surface renewal is underway. The grain of the skin refines, pores read softer, and makeup sits differently in the morning, if you still feel like wearing it.

Night 28

The cycle closes on new skin.

One full renewal cycle later: a firmer feel at the jaw, a quieter, more even tone, and the kind of light that reads as rest. This is the night to take the photo.

2,300 rituals in, the reviews read like diaries.

We asked wearers to report at night 28, one full cycle in. Here is what came back.^†

91%

reported visibly smoother texture

87%

reported a brighter, more even tone

84%

retired three or more other products

"Retinol wrecked me twice. This gave me the results without the peeling era. Night 28 photo genuinely surprised me."

"I'm a minimalist by exhaustion, not philosophy. One bottle, four drops, done. My dermatologist asked what changed."

"Bought the single, came back for the trio before the bottle was done. The texture change at week two sold me."

Macro texture of the golden serum on porcelain

"The discipline of one good thing, nightly, beats the chaos of ten."

The founding note in every SOLENNE batch book, signed before bottling.

^† Self-reported results from a 56-person, 8-week consumer perception study of nightly use. Individual results vary.

A ritual of one step.

Four drops, once nightly. The whole routine takes less time than reading this section.

Cleanse, then pat dry

Warm water and your usual cleanser. Leave skin barely damp.
Press, don't rub

Four drops warmed between fingertips, pressed from the center of the face outward, down the jaw and neck.
Let the night work

Nothing layers on top. The squalane seals the barrier while the actives run the renewal cycle.

Hands drawing serum into a glass dropper over ivory linen

The offer

Choose your renewal.

One bottle carries one full 28-night cycle. Most begin with the Duo: one cycle to renew, one to keep what you gained.

July batch bottled on the 3rd · small-batch runs regularly sell through

Three Le Sérum Nº 1 bottles on travertine stone steps

Single

One bottle · one 28-night cycle

$128

Le Sérum Nº 1, 30 ml
Free worldwide shipping
60-day empty-bottle guarantee

Begin with one

Duo

Two bottles · renew, then hold

$218$256Save $38

Two 30 ml bottles, same batch
Printed 28-night ritual card
Free worldwide shipping
60-day empty-bottle guarantee

Choose the Duo

Trio

Three bottles · the full 12-week arc

$288$384Save $96

Three 30 ml bottles, same batch
Printed 28-night ritual card
Priority dispatch
60-day empty-bottle guarantee

Commit to the arc

60 day promise

Finish the bottle. If your skin doesn't show it, we refund it.

Use Le Sérum Nº 1 nightly for the full cycle. If you are not visibly renewed by day 60, write to us and we refund your order in full, empty bottle and all. The risk stays with us.

Asked before beginning

Is bakuchiol really comparable to retinol?

Published comparative studies have found bakuchiol improved the look of photoaging comparably to retinol over 12 weeks, with meaningfully less reported dryness and stinging. We use it at 1.2%, paired with copper peptides, precisely so the results come without the "retinol uglies" that make people quit.

My skin is sensitive and reactive.

The formula is fragrance-free, essential-oil-free and built around barrier-identical squalane. Patch test on the inner forearm for two nights first, as with anything new. Most reactive-skin wearers report the calm-down described at night 7, not a flare.

Will it fit with what I already use?

It is designed to replace your night serums, not join them. Keep your cleanser and your morning SPF; give the serum the night to itself. That single-signal simplicity is a large part of why it works.

When will I actually see something?

Calm and comfort first, around a week in. Texture turning around night 14. The photograph moment is night 28, one full renewal cycle, which is why the guarantee runs to day 60: enough time to finish the cycle and judge it honestly.

Shipping, returns, the practical part.

Orders dispatch within 48 hours with free tracked shipping worldwide. The 60-day guarantee covers used and even empty bottles: write to [email protected] and we make it right.

Is it vegan and clean?

Vegan and cruelty free. No fragrance, no essential oils, no drying alcohols, no dyes. Amber glass to protect the actives, bottled in small monthly batches so nothing sits in a warehouse aging.

Twenty-eight nights from now, you'll know.

Either your mirror settles it, or our guarantee does. Both outcomes are covered.

Begin the ritual · from $128

60-day empty-bottle guarantee · Free shipping · Ships within 48 hours