Lactobacillus Ferment Lysate
Lactobacillus Ferment Lysate
Supports the skin’s surface environment and helps create more favourable conditions for moisture retention.
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Discover heroesSTEP 4 OF 8 IN THE HYDRATION RITUAL
prebiotic hydration barrier serum
A weightless gel-serum that settles into the skin, softens the feel of dehydration, and leaves the surface quietly hydrated for hours.
Made fresh for you once you order · dispatched within 2 working days.
On the skin
Weightless jelly that sinks in fast
Leaves skin soft, plumped and hydrated
Supports steadier moisture across the day

Why this exists
Inside the bottle
Lactobacillus Ferment Lysate
Supports the skin’s surface environment and helps create more favourable conditions for moisture retention.
Hydrolyzed Hyaluronic Acid
Delivers lighter hydration into the upper layers of the stratum corneum for a plumper-looking feel.
Sodium Hyaluronate
Binds moisture at the surface to keep skin feeling smoother and more dewy in good light.
Sodium PCA
Replenishes a component of the skin’s natural moisturising factor to support everyday hydration.
Pogostemon Cablin Oil
Provides a very faint warm-green finish that fades quickly after application.
On the skin
A clear soft jelly with a light bounce on the fingers. It thins on contact with warm skin and absorbs in under thirty seconds. The finish is calm and conditioned, with no tack or film.
Where this sits
From first cleanse to final seal, this is step 4 of 8 in the full Hydration Ritual : the lightweight serum that restores hydration before cream.
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The application
Apply to clean, towel-dried skin in the morning and evening before any heavier moisturiser or cream. This keeps the serum in direct contact with the skin’s surface.
Use two to three drops for the face and neck, then press gently into place. Pressing helps preserve the gel structure and supports even distribution.
Follow with moisturiser or cream to seal in hydration. In the morning, finish with SPF as the last step in your ritual.
What to expect
Skin feels softer and more comfortable within minutes of application, especially in areas where dehydration tends to show first. The surface looks a little smoother and less thirsty.
The tight, papery feeling after cleansing is less noticeable. Skin holds moisture more evenly through the day, so it feels less dependent on repeated layering.
Hydration feels steadier, with less fluctuation from weather and cleansing. The skin’s baseline comfort is more consistent across morning and night.
The deeper detail
The prebiotic at the centre of this serum is Lactobacillus Ferment Lysate, a postbiotic byproduct of controlled fermentation. Applied topically, it supports the commensal bacterial population on the skin's surface, which in turn supports a more coherent and resilient barrier response. It is dosed at a level where it functions as an active, not a label claim.
Hydrolyzed Hyaluronic Acid and Sodium Hyaluronate provide hydration at two depths simultaneously. The hydrolyzed form penetrates into the upper layers of the stratum corneum, where it contributes to plumper, more even-looking skin. Sodium Hyaluronate works at the surface, binding atmospheric moisture and maintaining the smooth, dewy finish visible in good light. Sodium PCA, a component the skin already produces as part of its natural moisturising factor, completes the hydration layer by restoring what environmental stress and cleansing routinely strip away.
The texture is a clear, soft jelly : it thins slightly on contact with warm skin and absorbs in under thirty seconds, leaving the surface feeling conditioned rather than treated. A low-level Pogostemon Cablin oil provides the very faint, warm-green finish that dissipates quickly.
A small-batch boutique skincare house, made to order. Every bottle is formulated and filled within two working days of your order, then dispatched from the fulfilment centre closest to you : our European facility for United Kingdom and European Union customers, our United States facility for North American customers. Because every bottle is bottled to order, what arrives at your door is at the peak of its actives : nothing has been sitting against light, heat, or oxygen for months. Two-day production is the price of formulation freshness, and the boutique standard we hold ourselves to.
Cruelty-free. Vegan. Dermatologically tested. Gluten free. Natural certified (Ecocert COSMOS Natural).
From our community
Dropper gives two or three drops, texture's a clear jelly that spreads thin. Works before cream at night or under SPF. Subtle plump but noticeable when my cheeks look tired from heating.
Love the weightless bounce, no tack at all. Layers under moisturiser well and my skin feels calmer after cleansing. Only issue is the bottle's just 30ml so I'm trying not to use it twice a day because I'll run out fast. Wish it came in a bigger size because I genuinely enjoy using it morning and evening.
Two or three drops before cream and my skin looks softer within minutes. Hydration actually lasts till afternoon which is rare for me. I do like that it's made to order but honestly I keep buying it because it just works on my dry skin.
Jelly texture absorbs fast and I see a bit of plump. But 30ml disappears when you use it twice daily.
Does what it says quietly. Surface feels softer and my skin holds hydration more evenly through the day. Not flashy but for a temperamental barrier that consistency is the win.
Absorbs fast. Skin stays comfortable.
Three drops, clear jelly, settles almost instantly. Skin looks more even and less papery by lunch. Faint scent disappears quickly so it layers without leaving a film.
Quick plump, steadier by evening.
Light, sits under heavier cream no fuss.
Cheeks look less red and it stays calm under cream.
Bought it for dehydrated cheeks. Absorbs in seconds, leaves soft surface not slippery. After a week skin held moisture better through the day.
Every OVESSI order is prepared once you place it. Your order is filled, sealed and labelled for you, then dispatched within 2 working days. Nothing waits on a warehouse shelf.
In case you wondered
Pair it with
Small batch. Filled for you. Made in EU and US.