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Suitable for
All skin types
Why we stand behind it
Retinal is 11x more effective than retinol - and this serum makes it accessible for even sensitive skin. But what makes the CEL™ Retinal Serum genuinely different is the patent-pending CEL™ Complex: a bioactive blend developed by Skin Diligent's longevity scientists that targets 10 visible mechanisms of skin aging. With an ultra-light satin texture that absorbs instantly and leaves no residue, this is the night serum for skin that wants to age on its own terms.
The CEL™ Retinal Serum combines 0.15% encapsulated slow-release retinal with the patent-pending CEL™ Complex, a bioactive blend of botanical extracts, peptides, and exosomes developed by Skin Diligent's longevity scientists. The encapsulation in natural botanical resin delivers retinal gradually for maximum efficacy and optimal tolerance - making this one of the rare retinal formulas suitable for sensitive and acne-prone skin. In an independent clinical study on 20 women aged 35 to 60, all with sensitive skin, 95% showed visibly smoother, firmer, and more even skin at 28 days - rising to 100% at 56 days.
Formulated in France. Final formula tested to be free of estrogenic and androgenic endocrine disruption. Dermatologist tested.
Key ingredients
Encapsulated Retinal: Slow-release retinal in natural botanical resin. 11x more effective than retinol. Visibly reduces fine lines, refines texture, and improves firmness and radiance - with optimal tolerance including sensitive skin.
CEL™ Complex: Our patent-pending bioactive blend of botanical extracts, peptides and exosomes. Targets 10 mechanisms of skin aging. Visibly supports skin firmness, smoothness, and long-term resilience.
Baobab Pulp Extract: Rich in antioxidants and vitamins C and E. Deeply nourishing and soothing. Visibly supports skin elasticity and a healthy, luminous complexion.
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
Fragrance Free
Alcohol Free
Soy Free
Non GMO
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.
Shake before use. Apply in the evening to clean, slightly damp skin. Start by applying every other night, increasing to nightly use as tolerated. Follow with moisturizer. Use sunscreen daily. As a precaution for all retinoids, avoid using during pregnancy, breastfeeding, or while trying to conceive.
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 accountOur 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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