Exceptional
"A brilliant serum that I’ve been using regularly for a long time. I’m always very happy with it. The clean formula is really important to me."
Skin Diligent
Cellular Hydration Serum
- Overview
- Choosing your shade
- How to use
- Ingredients
- Sustainable Packaging
- About the brand
Highlights
Suitable for
All skin types
Why we stand behind it
The Cellular Hydration Serum is science and safety working together at their best. This serum goes beyond surface hydration to address the skin's four fundamental daytime needs: hydration, barrier protection, antioxidant defense, and microbiome balance.
A patented Saccharomyces/Grape Ferment helps support vitamin D levels to visibly support skin's natural defenses. Probiotics and prebiotics balance the microbiome, while hyaluronic acid and magnesium visibly plump and smooth. This serum restores hydration and strengthens skin resilience, keeping your complexion smooth, plump, and naturally luminous.
In independent testing, 100% of testers showed a measurable increase in skin hydration after just 2 hours. The formula is a lightweight, fast-absorbing gel - non-sticky, suitable for facial massage, and gentle enough for even the most sensitive and reactive skins. Skin is deeply replenished, visibly luminous, and completely safe.
Key ingredients
Lactobacillus ferment & Inulin: Probiotic & prebiotics that supports skin microbiome balance for a visibly healthier, more resilient complexion.
Magnesium Chloride & Hyaluronic Acid: Boost hydration, visibly plump the skin, and improve its appearance.
Saccharomyces/Grape Ferment: A patented ingredient that supports vitamin D levels to boost the skin's natural defenses, support healthy-looking complexion, and enhance skin resiliency.
this product meets
The Credo Clean Standard™
Every product we offer meets our industry leading standards for safety and sustainability.
learn moreThis product is
Cruelty Free
Sustainable Packaging
Vegan
Gluten Free
Alcohol Free
Soy Free
Non GMO
What is an undertone?
An undertone is the color beneath the surface of your skin, which never changes (even with a tan). There are three types of undertones:
Pink/Cool
I see red or pink undertones around the perimeter of my face and neck.
My skin burns easily, but barely tans.
My skin looks better in silver jewelry than gold.
Neutral
I see both pink and yellow undertones around the perimeter of my face and neck.
My skin sometimes burns and sometimes tans.
My skin looks good in both gold and silver jewelry.
Yellow/Warm
I see yellow or golden undertones around the perimeter of my face and neck.
My skin rarely burns, but tans easily.
My skin looks better in gold jewelry than silver.
Find your shade match
Take our 1 minute quiz and get matched to real people with your skin tone and type.
Usage
Shake before use. Apply on clean and slightly damp skin for an even diffusion of products on the skin. Can be used morning and evening – Follow with Vitamin C Serum-in-Oil in the morning and CEL™ Retinal Serum at night.
Pro-tip
When pairing with Skin Diligent Vitamin C Serum-in-oil (sold separately) in the morning, you can skip the moisturizer! The two serums together replace a day cream.
Full ingredient list
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)
Fragrance
Radical Fragrance transparency
Credo believes in your right-to-know.
US law does not require fragrance transparency. Credo requires all brands to categorize the fragrance in each product and encourages full ingredient disclosure.
This fragrance is comprised of:
essential oils
certified organic fragrance
natural fragrance
naturally-derived fragrance
synthetic fragrance
Help us end beauty packaging waste
We co-founded the nonprofit Pact to demystify how to recycle your beauty packaging empties and divert waste from landfills.
How to recycle your empties
1. Disassemble and clean all components
2. Pick the right disposal bin
3. Drop off your empties at your nearest Pact bin
1 Product Recycled = 10 Credo Rewards Points
create accountSkin Diligent
Our skin is in conversation with everything around it - the air, the light, the choices we make, and everything we apply to it. Epigenetics is the science of that conversation. It is the science of how our environment shapes the way we age. It is also the science that brought Skin Diligent into existence. Skin Diligent is a French epigenetic laboratory where the biology of longevity and the science of skin converge. Our research is led by a biologist and former Institut Pasteur scientist. Our formulas are conceived to act at the epigenetic level - supporting the biological processes that determine not just how our skin looks today, but how it ages over the years ahead. Every finished formula is tested free of estrogenic and androgenic endocrine disruption. Not individual ingredients. The whole formula. Because at the epigenetic level, what touches our skin matters completely. Each product is independently clinical tested and made to the highest standards of longevity science - born from years of asking what skincare could be if safety and efficacy were never separated. Dermatologist tested. Hormone Safe Tested. Skin Diligent.
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