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Our team selected this serum because the inclusion of plant-derived exosomes alongside a clinically recognised signal peptide makes it a more considered approach to skin renewal than most serums at this price point. The layered hydration system — dual-weight hyaluronic acid plus ectoin — means it addresses barrier function and moisture retention simultaneously rather than treating them as separate concerns. It sits well within a morning and evening routine for anyone looking to support skin firmness and clarity with consistent, ingredient-led results.
About this product
The Inkey List Exosome Serum
Exosomes are extracellular vesicles — in this case plant-derived from Centella Asiatica — that function as intercellular messengers, and their inclusion in topical skincare represents one of the more scientifically interesting developments in the category. The Inkey List's Exosome Serum centres on 1% Cica Exosome, included to help support collagen production and promote cell renewal and repair at the skin level.
Alongside this, 1% Kollaren™ — a tripeptide-1 signal peptide — is formulated to help trigger cell renewal and contribute to improved firmness. Signal peptides work by communicating with skin cells rather than simply sitting on the surface, which is why peptide concentration and form matter more than their presence alone.
Hydration is addressed through two forms of hyaluronic acid — sodium hyaluronate and hydrolysed sodium hyaluronate — which work at different molecular weights to draw and retain moisture across skin layers. Ectoin, a naturally derived extremolyte, supports the skin barrier and helps stabilise the formula's efficacy. The brand states the combination can provide up to 12 hours of hydration. Prickly pear extract (Hydrolyzed Opuntia Ficus-Indica Flower Extract) contributes gentle exfoliation and additional hydration support, while ubiquinone (coenzyme Q10), allantoin, and lecithin round out the formula with antioxidant activity, soothing properties, and further barrier reinforcement respectively.
The texture is creamy but fast-absorbing, leaving no residue. The formula is free from parabens, sulphates, phthalates, and mineral oils. The brand suggests results may be visible in as little as two weeks with consistent morning and evening use.
What it does
Benefits
- 01
1% Cica Exosome (Centella Asiatica-derived) to help support collagen production and cell renewal
- 02
1% Kollaren™ tripeptide-1 signal peptide to help enhance skin firmness
- 03
Dual-weight hyaluronic acid and ectoin for barrier support and up to 12 hours of hydration
- 04
Prickly pear extract for gentle exfoliation and additional hydration
- 05
Ubiquinone, allantoin, and lecithin for antioxidant support, soothing, and barrier reinforcement
- 06
Free from parabens, sulphates, phthalates, and mineral oils — suitable for all skin types
Get the most from it
How to use
Apply morning and night to cleansed skin before moisturiser. The brand suggests results may be visible within two weeks of consistent use.
What's inside
Ingredients
View full ingredient list
Aqua (Water/Eau), Caprylic/Capric Triglyceride, Dipropylene Glycol, Glycerin, Propanediol, Coconut Alkanes, Sodium Acrylates Copolymer, Dimethicone, Ectoin, Phenoxyethanol, Cetearyl Olivate, Sorbitan Olivate, Allantoin, Hydrolyzed Sodium Hyaluronate, Sodium Hyaluronate, Butylene Glycol, Lecithin, Ubiquinone, Coco-Caprylate/Caprate, Ethylhexylglycerin, Sodium Phytate, Pentylene Glycol, Hydrolyzed Opuntia Ficus-Indica Flower Extract, Centella Asiatica Leaf Extract, Dextran, Tripeptide-1
Common questions
Frequently asked
Is this serum safe to use with prescription retinoids or acids?
The formula is gentle and barrier-supportive, but introduce it gradually if you’re already using prescription retinoids or high-strength acids. Apply it on alternate nights at first, and always follow with SPF in the morning.
How long until I see a difference in firmness or texture?
The brand indicates visible changes may appear within two weeks of twice-daily use; most users notice improved hydration within days and subtle firming benefits closer to the four-week mark.
Can I use it around the eye area?
The lightweight, fragrance-free texture is generally well-tolerated up to the orbital bone, but avoid direct contact with the lash line and discontinue if irritation occurs.
Does it layer well under sunscreen and make-up?
Yes—the serum absorbs quickly and leaves no residue, so it sits comfortably under SPF, primer, and foundation without pilling.
Who should avoid this product?
It is suitable for all skin types, including sensitive; however, anyone with a known allergy to Centella asiatica or any listed ingredient should patch-test first or choose an alternative.
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