Your routine
Biologique RechercheLotion P50T
Why it fits
Biologique Recherche’s exfoliating, purifying and balancing lotion for seborrheic Skin Instants. The first step after cleansing.
Biologique Recherche Sérum Yall O₂
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Explore La Crem rewardsTight, dehydrated skin
An intensive finishing serum that deeply hydrates and visibly plumps the skin. Applied as the last step of your routine, it helps with dehydration and visible volume loss.
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Boutique details
Your Edmonton boutique.
5238 Windermere Boulevard
Edmonton AB T6W 0L9
Canada
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Shipping, on usRegular $149+ · Priority $249+ CAD
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Selected with care.
Biologique Recherche
Sérum Yall O₂
Your ritual begins with the right choice.
$138.00 CAD
Taxes calculated at checkout.
The skincare focus
The last step for skin that feels tight and looks less full.
An intensive finishing serum that deeply hydrates and visibly plumps the skin. Applied as the last step of your routine, it helps with dehydration and visible volume loss.
Explore our ingredient glossaryBiologique Recherche
The formula, explained.
The ingredients behind this formula—and what they bring to your skin.
Sodium Hyaluronate
A form of hyaluronic acid that helps hydrate and visibly plump the skin.
Glycerin & Trehalose
Humectants that help attract and hold moisture for skin comfort.
Hydrolyzed Lupine Protein
A plant protein that helps condition the skin and contributes to a smoother look.
Ingredient imagery is illustrative. Explore the full ingredient list below.
Made to work together
Pairs beautifully.
Cleanse with the milk selected for your Skin Instant, apply your Lotion P50, then your serums and cream. Sérum Yall O₂ comes last to seal in your routine. In the morning, add a broad-spectrum sunscreen. Your esthetician can help personalize the steps before it to your Skin Instant.
Your routine
Biologique RechercheLait VIP O₂
Why it fits
The cleansing step and the first step of your Biologique Recherche routine, removing makeup, sunscreen and impurities before your Lotion P50.
Worth knowing
The finer details.
A closer look at your skin, your routine and what goes into the formula.
Biologique Recherche Sérum Yall O₂
Biologique Recherche Sérum Yall O₂ is an intensive finishing serum designed to deeply hydrate and plump the skin.
Formulated with hyaluronic acid and antioxidant plant extracts, it helps combat dehydration and visible volume loss. It smooths the look of fine lines, visibly plumps the complexion for a fuller look and leaves skin looking radiant, refreshed and revitalized.
Applied as the final step of your Biologique Recherche program, it helps seal in all the care applied before it.
Why we love it
We like Sérum Yall O₂ for skin that feels tight and looks a little deflated from dehydration. Because it is the last step of the routine, it is easy to add without changing the rest of a client's program. We think of it as the step that seals everything in and leaves the complexion looking fuller and fresher.
Benefits
- Deeply hydrates to replenish moisture and restore comfort to tight or dehydrated skin
- Smooths the look of fine lines and visibly plumps the complexion for a fuller look
- Helps skin look more vital, radiant and refreshed
- Helps skin look revitalized and helps protect it from environmental stressors
- Ideal as the final step in your skincare routine to seal in all prior care
Best for
Tight, dehydrated skin
Keep it for the very end: apply your serums and cream first, then press in Sérum Yall O₂ to seal everything in.
How to use
- Cleanse, apply the Lotion P50 selected for your Skin Instant, then your other serums and cream.
- Apply 4 to 5 drops of Sérum Yall O₂ to the face, neck and décolleté, morning and/or night.
- Use it as the last step of your Biologique Recherche program.
- In the morning, finish with a broad-spectrum sunscreen.
Full Ingredient List
WATER (AQUA), GLYCERIN, METHYLPROPANEDIOL, ISOCETYL STEARATE, DICAPRYLYL CARBONATE, MALTODEXTRIN, PERFLUORODECALIN, BENTONITE, HYDROLYZED LUPINE PROTEIN, CAESALPINIA SPINOSA FRUIT EXTRACT, KAPPAPHYCUS ALVAREZII EXTRACT, JUGLANS REGIA (WALNUT) SEED EXTRACT, GLYCINE SOJA (SOYBEAN) OIL, SODIUM HYALURONATE, SERINE, CITRIC ACID, ALGIN, GLYCERYL POLYACRYLATE, PULLULAN, TOCOPHEROL, TREHALOSE, PENTYLENE GLYCOL, SORBITAN ISOSTEARATE, SUCCINIC ACID, HYDROXYETHYL ACRYLATE/SODIUM ACRYLOYLDIMETHYL TAURATE COPOLYMER, UREA, ISOHEXADECANE, POLYPERFLUOROMETHYLISOPROPYL ETHER, POLOXAMER 188, POLYSORBATE 60, DISODIUM PHOSPHATE, DISODIUM EDTA, POTASSIUM PHOSPHATE, CAPRYLYL GLYCOL, PHENYLPROPANOL, PHENOXYETHANOL, SODIUM BENZOATE, BENZOIC ACID, SODIUM METABISULFITE, SORBIC ACID.
Frequently Asked Questions
What does Sérum Yall O₂ do?
It deeply hydrates and visibly plumps the skin, smooths the look of fine lines and helps with dehydration and visible volume loss.
When do I apply it?
As the last step of your Biologique Recherche program, after your other care, in the morning and/or at night.
How much should I use?
4 to 5 drops for the face, neck and décolleté.
Who is it for?
Skin that feels tight or dehydrated, or that is showing visible volume loss.
Does it replace my cream?
No. It is applied after your other care, including your cream, to help seal in the routine.
Does it contain nuts?
Yes. The formula contains ingredients derived from walnut. If you have a nut allergy, please book a consultation with one of our estheticians before purchasing.
Consultation & reactions
At Loshen & Crem, we want to ensure you have the best possible experience with Biologique Recherche. Before purchasing any Biologique Recherche product, we highly recommend booking a consultation with one of our estheticians. Consultations are available virtually through Google Meet or in person at our Edmonton boutique. An appointment is required.
In the event of a reaction, Biologique Recherche requires photos of the reaction and the product, the lot number found on the product or the bottom of the box, and proof of a consultation with one of our estheticians before they can review the concern.
If you choose to purchase without a consultation and experience a reaction, we will be unable to provide a refund. Our team is always happy to answer your questions and help you select the products best suited to your skin.
Shipping & returns
For delivery and return information, view our policy.
Biologique Recherche Sérum Yall O₂ is an intensive finishing serum designed to deeply hydrate and plump the skin.
Formulated with hyaluronic acid and antioxidant plant extracts, it helps combat dehydration and visible volume loss. It smooths the look of fine lines, visibly plumps the complexion for a fuller look and leaves skin looking radiant, refreshed and revitalized.
Applied as the final step of your Biologique Recherche program, it helps seal in all the care applied before it.
Benefits
- Deeply hydrates to replenish moisture and restore comfort to tight or dehydrated skin
- Smooths the look of fine lines and visibly plumps the complexion for a fuller look
- Helps skin look more vital, radiant and refreshed
- Helps skin look revitalized and helps protect it from environmental stressors
- Ideal as the final step in your skincare routine to seal in all prior care
How to use
- Cleanse, apply the Lotion P50 selected for your Skin Instant, then your other serums and cream.
- Apply 4 to 5 drops of Sérum Yall O₂ to the face, neck and décolleté, morning and/or night.
- Use it as the last step of your Biologique Recherche program.
- In the morning, finish with a broad-spectrum sunscreen.
Ingredients
WATER (AQUA), GLYCERIN, METHYLPROPANEDIOL, ISOCETYL STEARATE, DICAPRYLYL CARBONATE, MALTODEXTRIN, PERFLUORODECALIN, BENTONITE, HYDROLYZED LUPINE PROTEIN, CAESALPINIA SPINOSA FRUIT EXTRACT, KAPPAPHYCUS ALVAREZII EXTRACT, JUGLANS REGIA (WALNUT) SEED EXTRACT, GLYCINE SOJA (SOYBEAN) OIL, SODIUM HYALURONATE, SERINE, CITRIC ACID, ALGIN, GLYCERYL POLYACRYLATE, PULLULAN, TOCOPHEROL, TREHALOSE, PENTYLENE GLYCOL, SORBITAN ISOSTEARATE, SUCCINIC ACID, HYDROXYETHYL ACRYLATE/SODIUM ACRYLOYLDIMETHYL TAURATE COPOLYMER, UREA, ISOHEXADECANE, POLYPERFLUOROMETHYLISOPROPYL ETHER, POLOXAMER 188, POLYSORBATE 60, DISODIUM PHOSPHATE, DISODIUM EDTA, POTASSIUM PHOSPHATE, CAPRYLYL GLYCOL, PHENYLPROPANOL, PHENOXYETHANOL, SODIUM BENZOATE, BENZOIC ACID, SODIUM METABISULFITE, SORBIC ACID.
Skin Reaction Policy
At Loshen & Crem, we want to ensure you have the best possible experience with Biologique Recherche. Before purchasing any Biologique Recherche product, we highly recommend booking a consultation with one of our estheticians. Consultations are available virtually through Google Meet or in person at our Edmonton boutique. An appointment is required.
In the event of a reaction, Biologique Recherche requires photos of the reaction and the product, the lot number found on the product or the bottom of the box, and proof of a consultation with one of our estheticians before they can review the concern.
If you choose to purchase without a consultation and experience a reaction, we will be unable to provide a refund. Our team is always happy to answer your questions and help you select the products best suited to your skin.
The care behind your order
From our boutique.
To your door.
A few helpful details, before your next delivery.
Track your order01 · Across Canada
A good thing, on its way.
$149+Free Regular shipping
$249+Free Priority shipping
CAD · After discounts, before taxes and shipping. Conditions and product exclusions apply.
Canada & U.S. delivery details02 · Close to home
Collect in Edmonton.
Choose pickup at checkout when available. We’ll let you know when your order is ready.
Speak with our boutique03 · A little reassurance
Here after checkout, too.
Request an eligible return within 30 days. Items must be unopened, unused and in their original packaging. Final-sale exclusions apply.
Returns & order support
Sodium Hyaluronate
A form of hyaluronic acid that helps hydrate and visibly plump the skin.
Glycerin & Trehalose
Humectants that help attract and hold moisture for skin comfort.
Hydrolyzed Lupine Protein
A plant protein that helps condition the skin and contributes to a smoother look.
Juglans Regia (Walnut) Seed Extract & Tocopherol
A plant extract and vitamin E that support the formula's antioxidant approach.
Curious about your ingredients?
Explore La Matière
A little guidance. A more considered routine.
Your skin.
Our attention.
Beautiful formulas are only part of the story. Knowing what belongs in your routine makes all the difference.
Talk through your skin, the products you already use and the questions on your mind with one of our facialists.
Book a consultation Just a product question? Ask us.Personal guidance, in Edmonton or online.
The care behind your care
A place in your routine.
A team in your corner.
From your first question to your next replenishment, there’s a real person here to help.
01 Make sense of what you already use
You don’t need to start over. Bring us your current routine and we’ll help you understand where a new formula fits.
Ask our team02 Get to know your skin
Take our skin questionnaire for a thoughtful starting point, then speak with us if you’d like to explore your recommendations.
Find your starting point03 Keep the conversation going
A question about how to use it? Unsure about your next step? You’re welcome to come back to our team for guidance.
We’re here to helpFrom our Edmonton boutique
Explore Biologique Recherche.
Find your place to begin.
Discover Biologique Recherche Sérum Yall O₂ at Loshen & Crem, a skin-health boutique and facial studio in Edmonton, Alberta. Explore the Biologique Recherche collection online across Canada, or speak with our facialists about how this formula fits into the products you already use.
A little care, to keep.
Your ritual, beautifully noted.
The guidance you’ll want when you get home: how to use it, what to expect and when to check in. A little reminder, with your team still in reach.