THE LONGEVITY SYSTEM
THE LONGEVITY SYSTEM
THE LONGEVITY SYSTEM
THE LONGEVITY SYSTEM

THE LONGEVITY SYSTEM

The complete routine. Morning and night, the full rhythm.

$400.00 Sale • Save
  • Global anti-aging: lines, firmness, radiance and skin quality
  • Triple collagen-support action
  • Complete morning and evening protocol
  • Skin looks healthier and more resilient over time
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What you can expect

Skin looks brighter by day.

Skin appears firmer and more rested over time.

A complete day and night routine.

Tested free of estrogenic and androgenic endocrine disruption.

Tested on real skin

Day 1 Day 56

Reduced Fine Lines

"My skin feels smoother and looks more radiant than ever before."

Retinol Night Serum

Day 1 Day 42

FIRMER, SMOOTHER SKIN

"I can see a noticeable lift and my skin feels more elastic."

Exosome Advanced Night Cream

Day 1 Day 56

Less crepey texture

"My skin is soft and smoother (I'm 52)"

Exosome Advanced Night Cream

Day 1 Day 28

Brighter Complexion

"The dark spots and blemishes have visibly faded and my skin tone is more even."

Vitamin C Serum-in-Oil

MORNING:
On clean skin, apply 3-5 drops of the Cellular Hydration Serum to slightly damp skin.
Follow with 3-5 drops of the Vitamin C Serum-in-Oil.

Note: Cellular Hydration Serum + Vitamin C Serum-in-Oil = your day cream.

EVENING:
On clean skin, apply 4-5 drops of the CEL™ Retinal Serum to slightly damp skin.
Finish with 2-3 pumps of the Exosome Advanced Night Cream.

Note: If you are new to retinal, start every other night for the first 3 weeks, then increase as tolerated. Use sunscreen every morning.

Aqua, Balanites roxburghii seed oil*, Glycerin, Camelina sativa seed oil, Propanediol, Simmondsia chinensis seed oil, Butyrospermum parkii butter*, Cetearyl alcohol, Camelina sativa seed extract, Glyceryl behenate, Sodium stearoyl glutamate, Lactobacillus extracellular vesicles, Magnesium chloride, Zinc lactate, Anacardium occidentale (cashew) extract*, Rosmarinus officinalis leaf extract*, Sodium hyaluronate, Xanthan gum, Helianthus annuus seed oil*, Glyceryl caprylate, Parfum**, 1,2-Hexanediol.

*Organic ingredients
**100% Natural parfum

Water (Aqua), Propanediol, Glycerin, Inulin, Sunflower Seed Oil (Helianthus annuus seed oil), Protium heptaphyllum resin, Tara Gum (Caesalpinia spinosa gum), Sodium Hyaluronate, Aloe barbadensis leaf juice powder, Magnesium Chloride, Saccharomyces/Grape Ferment Extract, Lactobacillus Ferment, Coco Glucoside, Decyl Glucoside, Ethyl Lauroyl Arginate HCl, Sodium Citrate, Sodium Benzoate, Fragrance (Parfum) (100% natural)

Hemp Seed Oil (Cannabis sativa seed oil)*, Cocoa Extract (Theobroma cacao extract), Brassica napus extract, Camelina sativa seed oil*, Ascorbyl tetraisopalmitate, Pomegranate Extract (Punica granatum extract)*, Sunflower Seed Oil (Helianthus annuus seed oil), Moringa Oil (Moringa oleifera seed oil), Protium heptaphyllum resin, Fragrance (Parfum) (100% natural)

*Organic ingredients

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, Adansonia digitata pulp extract, Cyamopsis tetragonoloba gum, Acacia senegal gum, Lecithin, Tocopherol, Helianthus annuus seed oil, Sodium citrate, Retinal, Xanthan gum, Ascorbyl palmitate, Sodium benzoate.

Free of parfum

Free of preservatives

Morning to night, the full rhythm of how skin defends and repairs.

By day, the skin is protected and its hydration held. By night, its repair is supported and its renewal encouraged. The visible signs of age are addressed, lines softened, firmness and radiance restored, but never at the expense of the skin beneath. Underneath the results, the barrier is stronger, the balance kept, the skin's own functions supported rather than worn down.

This is the difference. Most skincare treats the surface and stops there. We care for how skin looks today, and for how well it works for years to come.

We test what almost no one tests.

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

Tested free of estrogenic and androgenic endocrine disruption

read how we test for endocrine disruption

FAQ - Questions, answered

No. This is the complete routine, morning and night. No separate moisturizer is needed.

Speak with your doctor before using a retinal during pregnancy or breastfeeding. The rest of the routine can be discussed with them too.

Morning, Cellular Hydration Serum then Vitamin C then sunscreen. Night, the retinal serum, wait one minute, then the night cream.

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

  • 5 stars: 22 (96%)
  • 4 stars: 1 (4%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
C
Catherine K. (France)
Satisfied with the quintet

My skin is smoother and firmer

D
Dorothy Leng (United Kingdom)
Impressive and effective

I’ve been using the 5 products for a few weeks now and can feel and see its effects. Nothing dramatic but I do notice my skin reacting well and looking fresh and healthy, especially as I am definitely in the ‘mature’ age range!
I wanted a long-term, science-based system and I think this is it.

A
Angela Hillary (United Kingdom)
Love skin diligent

Love every single product…….retinal and vitamin C serum are fabulous!
Works great on my skin, speaking as a 74 year old…..👏👏🙂

L
Lisa Hannaby (United Kingdom)
Best skincare ever!

I have used what feels like hundreds of different skincare brands over the years. I always had pretty robust skin but then after some microblading, I developed erythematotelangiectatic rosacea. I tried all of the usual brands who supposedly “helped” symptoms. I tried laser. Then I entered perimenopause so my skin worsened again. I’d given up finding a solution and then I came across skin diligent. I’m a few weeks in to using the products and my skin feels the healthiest it has in 10 years. My redness has significantly decreased too. I still have hormonal flares but it’s nowhere near what it has been previously. It’s honestly like liquid gold.

C
Caroline D. (France)
Great products

Effective products – I recommend them

M
Muriel S. (France)
My ideal routine

Well, I’ve finally found a routine that suits me perfectly! My skin is moisturised, soft and in great condition. Time seems to stand still! Just five products for this little miracle – a routine so simple it feels like second nature. Never sticky. I love the results; I’m convinced by the routine and I’m sticking with it for good. I don’t need anything else. My skin never feels tight anymore! I’m 64 and it took me a while to find my solution.

M
Marc (France)
Perfect

I’m following the full routine and I’m seeing real benefits for my skin, particularly when it comes to the signs of ageing…

F
Florentine d. (France)
A unique experience...

Since I started using the Skin Diligent range, I can't put anything else on my skin! From the sensory experience to the visible results, no other product comes close (from the scent to the texture to how it feels on my skin). I could never switch brands again 😅. Thank you for the quality.

R
RUET C. (France)
Very good products

The cleanser is very enjoyable to use.
I really liked the vitamin C serum in the morning, and the night cream is very moisturising.
Very good experience

N
Nathalie B. (France)
Very satisfied!

Easy to apply. Very happy with the effect on my skin, which is softer and smoother.

V
Valérie L. (France)
Very good

Excellent hydration!
However, the pump on the exosome cream bottle is difficult to use.

Hello,
Thank you for your message and your kind feedback.
In the case of airless packaging such as the one used for Exosome Advanced cream, there may be priming issues with the pump. If this is the case, simply tab the base of the bottle firmly on a hard surface 2-3 times and the pump should work again.
Thank you and have a great day.
The Skin Diligent team

J
Julie B.
Well done!

I can no longer do without vitamin C oil, Cellular Hydration and night cream. Well done and thank you for the high quality of your products and your constant quest to offer innovative products that are different from others, much more effective but affordable.

C
CAROLE G.
Exceptional 🔥

I've been hooked since the very first day, and it's been three years now!

c
christine p. (France)
I love it!

I have been using the products for two years and am very satisfied. Despite the slightly high price, I remain loyal to the brand and always recommend it.

L
Laetitia U. (France)
Ideal routine

Initially, there was no “wow” factor. But I liked the simplicity of this routine. I love the cleanser: ultra-gentle texture and “fresh” effect. From the 3rd week onwards, there was a clear improvement in skin hydration: I no longer had any dehydration lines, nor any discomfort or tightness, regardless of my lack of sleep or my cycle. Very satisfied

L
Laura Hazlewood (United Kingdom)
Great products

Nice products, non greasy. struggling a bit with acne with them but on the whole feels like they are helping my skin. cleanser size is a bit small to balance other size products in the kit - will run out of that first. Havent needed to wear as much makeup as i used to.

Thank you for the very good feedback. Regarding the cleanser, please note that it is 86% glycerin based unlike typical cleansers which are 85-90% water. We chose glycerin because it is far more hydrating and soothing than water and much better for sensitive skin. It is also far more concentrated and you need to use 3-4 times less product than usual. Regarding acne, we strongly recommend using our Regulation Serum which is dedicated to this condition. Since you have the Quartet, you just add the Regulation serum am and pm before any other serum and you only apply it on the spots and inflamed areas. This serum will make a difference.

S
Sonia G. (France)
Super products

Great products!

N
Nadine J. (France)
Satisfactory

Is it true that the serum is applied before the vitamin C?

Thank you for your feedback. Absolutely, we recommend applying the Cellular Hydration Serum first, followed by the Vitamin C Serum. The oil content of the second serum will seal in the hydration even better, and the layering of these 2 serums will create a mini emulsion on the skin which is the equivalent of a day cream. After that, you only need to apply an SPF if you're going to be out in the sun.

L
Laurence M. (France)
Very satisfied

I am won over, I have finally found my beauty routine
Thank you Marine🤩

A
Anonymous (France)
Very good

Hi, I'm Julie LAINÉ and I've already placed two orders for Quatuor with you. I think the products are great. My complexion is very radiant and my spots have diminished. The only thing for me is that in the evening, despite the 2 serums + the cream, I find that the cream isn't rich enough and my skin feels tight. And there's just one little problem with the facial cleanser, which I love! It's great, but it's in too small a quantity. I'd rather pay more but get a bigger tube that lasts longer. Anyway, well done! These are great products that I'd recommend to all my friends.

S
Sabine R. (France)
A wonderful discovery

I love your products. Very nice to apply. My skin is beautiful and replenished, and spots are fading. I have the impression that the fine lines are fading, but it's too early to tell. I've given it 4 stars because I find the size of the cleanser really tiny.

l
lorraine g. (Belgium)
Very effective, very nice and discreet smell.

I don't usually give my opinion on brands.
But these products are just perfect! AND effective! Everyone tells me that my skin looks better, I'm 48 and going through menopause troubles, I've been using the trio skin diligent for 10 months and the quatuor for 1 month, and I never feel dry skin again. THANK YOU!
One last thing, I don't like it when products smell too much, but this is just perfect! A very nice, natural smell.

M
Magalie B. (France)
EFFECTIVENESS AND SIMPLICITY

I love everything about this routine! it is SIMPLE and EFFECTIVE! My skin is hydrated, smoother, and comfortable. The scent of the products is very enjoyable. The night cream is exceptional!!! The serums are perfect!!! The value for money is TOP!!!