CEL™ RETINAL SERUM
CEL™ RETINAL SERUM
CEL™ RETINAL SERUM
CEL™ RETINAL SERUM
CEL™ RETINAL SERUM
CEL™ RETINAL SERUM
CEL™ RETINAL SERUM
CEL™ RETINAL SERUM
CEL™ RETINAL SERUM
CEL™ RETINAL SERUM

CEL™ RETINAL SERUM

Encapsulated retinaldehyde, for visibly firmer, smoother skin.

$105.00 Sale Save

30ml

A nightly retinal, formulated for high tolerability. For skin focused on firmness and a smoother surface.
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Tested free of estrogenic & androgenic endocrine disruption

High tolerability

Made in France, formulated to EU standards

Free US shipping over $70. Ships from our US warehouse

For a complete night system, buy it with

Retinol vs retinal

texture

What it does

What you can expect to see

Skin appears visibly firmer.

Formulated for high tolerability.

Tested free of estrogenic and androgenic endocrine disruption.

TESTED FOR VISIBLE RESULTS

In a dermatologist-controlled study, the results built with time :

  • 100% said skin felt smoother, firmer and more even
  • 100% said skin quality improved day after day
  • 100% said skin looked visibly younger
  • 100% said their skin felt healthier after using the serum

Tested on 20 women aged 35 to 60, sensitive skin, every other night for three weeks then nightly. Measured at 56 days.

ENCAPSULATED rEtinal

Retinaldehyde is a well understood ingredient in visible aging, with a long research record behind it. Ours is encapsulated, so it is released slowly and stays stable, which is part of why it is gentle enough for most skin.

CEL™ Complex (Cellular Epigenetic LONGEVITY) 

Skin does not need stimulation alone. It needs the right conditions to maintain itself. Our patent-pending complex of botanical extracts, peptides and exosomes is built on that principle - and the results are visible. 2026 IMCAS Innovation finalist.

more on the CEL™ innovation

WE TEST WHAT ALMOST NO ONE TESTS.

Chemicals can behave differently together than alone. It is called the cocktail effect. So we test the finished formula, not single ingredients.

Tested free of estrogenic and androgenic endocrine disruption

01 - On damp skin
Just after cleansing, while skin is still slightly damp, apply three to five drops.

02 - Wait one minute
Give it a moment to settle before the next step.

03 - Then the night cream
Follow with the Exosome Advanced Night Cream to seal the routine.

Use in the evening only. Retinaldehyde is sensitive to light, and in the first months skin can be a little more reactive to the sun. Wear a broad-spectrum sunscreen each morning. Introduce it gradually, two or three nights a week to start, then build up as your skin settles.

Considered, and easy to begin

This is a retinal formulated for high tolerability, which makes it a considered choice for skin that is new to retinal, introduced gradually. If your skin is sensitive, begin slowly and patch test first.

If you are pregnant or breastfeeding, speak with your doctor before using a retinal.

Nothing hidden. We test the whole formula, so we show you the whole formula.

Water (Aqua), Propanediol, Dimethyl isosorbide, Glycerin, C9-12 alkane (vegetal origin), Sorbitol, Decyl glucoside, Protium heptaphyllum resin, Caesalpinia sappan extract, Coco glucoside, Hydrolyzed vegetable protein, Hydrolyzed moringa oleifera seed extract, Baobab Pulp Extract (Adansonia digitata pulp extract), Guar Gum (Cyamopsis tetragonoloba gum), Acacia senegal gum, Lecithin, Vitamin E (Tocopherol), Sunflower Seed Oil (Helianthus annuus seed oil), Sodium citrate, Retinal, Xanthan gum, Ascorbyl palmitate, Sodium benzoate.

Tule Explains

Introducing

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Faq - Questions, answered

At night, this serum hydrates and the Exosome Advanced Night Cream goes over it to keep that moisture in. Together they are your routine, so no separate moisturizer is needed.

Night only. Retinaldehyde is sensitive to light, so daylight is not its friend. Keep it to the evening, and wear sunscreen in the morning.

Appearance changes build over weeks, not days. Consistency is what makes them last. The study results above show how they built with time.

Every finished formula is tested free of estrogenic and androgenic endocrine disruption. Not single ingredients. The whole formula.

Speak with your doctor before using a retinal during pregnancy or breastfeeding.

It is formulated for high tolerability. Begin slowly, two or three nights a week, and patch test first. Build up as your skin settles.

  • 5 stars: 14 (93%)
  • 4 stars: 1 (7%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
L
Lucie Styring (United Kingdom)
Excellent

Fabulous products. Love your ethos. Hope to repurchase!

C
Christine Hymas (United Kingdom)
Pleasant to use.

Hard to say as I have only been using this product for one week. I can say it’s nice to apply as long as your skin is damp and is not greasy at all. Will it improve my skin? Time will tell.

l
lynne r. (France)
Hoping for good results

I love all your products. They have really improved the quality and comfort of my mature skin (I am 75 years old).

As I have extremely sensitive skin, I use retinal with caution (once or twice a week). So far, I have not experienced any irritation, but my skin is a little dry the next day.

I remain very optimistic.

M
Magali F. (France)
Promising

I have only just started using this serum, so I don't have enough feedback on its effectiveness. However, I can confirm that it doesn't irritate the skin, is easy to use and isn't greasy. A promising serum based on my limited use so far.

a
audrey G. (France)
Optimal tolerance

Very good experience. The serum is easy apply and feels comfortable on the skin. Excellent tolerance. My skin feels a little firmer after using it for a month and a half. The only downside is that the serum runs out a little too quickly (not enough for daily use).

Hello,
We recommend to apply 3 to 5 drops to the face and neck (apply to a slightly moist face for an even diffusion). By using this volume, the serum will last 3 months.

j
jessica q. (France)
Excellent product

Great texture and excellent results! I highly recommend this product!

F
Fabienne C. (France)
Satisfied

Great retinol, doesn't irritate the skin, and does the job.

I recommend it, and this isn't the first retinol product I've tried—I've tried lots of them.

V
Violaine.B
Effective as promised!

My sensitive skin tolerates it well and the results are clear to see. My skin is glowing, and my husband asked me if I was wearing make-up this weekend. "No, why?" "You look great, darling." I use the brand's entire range and will soon be buying the pre/probiotics to see if they help with my menopause symptoms. I have complete confidence in them.

C
Christine C.
Great innovation

The gel feels lovely and your skin feels really plumped up when you wake up. A great product that can also be used in the morning, unlike most retinol products 👌

C
Carole S.
Gentle yet effective!

This serum works effectively on the appearance of the skin, but is very gentle.

C
CAROLE G.
Exceptional

This serum is extraordinary.

A
Angelina A.
Very good serum.

Finally, I can use retinal. My sensitive skin loves it, and the results are there.

A
Anne (France)
A must-have

An excellent product which, when combined with the night cream, guarantees radiant, plumped-up skin when you wake up.
All the benefits of retinol in a gentle formula without the major drawbacks of retinol (redness, irritation).
I highly recommend it, as I do all the Skin Diligent products that I now use every day.

O
OliviaB
I really like it.

I had always been afraid to use a retinal product for fear that it would be a little irritating. I decided to give it a try anyway after reading your description, and I am amazed by its effects. I am still only using it every other night after four weeks, but I plan to move on to two days out of three very quickly, or even every evening.

C
Celine
A truly effective product

After three weeks of use, my skin is brighter, my complexion more even and, above all, my skin texture is finer and my pores are tighter.
This is the first time I've experienced all these benefits combined.
I was hesitant because my skin is quite sensitive, but I didn't experience any burning or tingling sensations.
Well done, Skin Diligent 😍