Serum Yall~O2
Benefits
Biologique Recherche Serum Yall~O2 is a rich face oil that plumps, hydrates and regenerates the skin. It combats dehydration and signs of ageing by enhancing skin fullness, leaving the complexion more energised and brighter.
Walnut Extract counteracts skin ageing by stimulating fibroblast activity and inhibiting elastase, preventing natural elastin from degrading and promoting a more elastic, smoother and toned skin with reduced fine lines.
Chaperone Proteins — produced by microorganisms from the Valaus Glacier — support elastin and collagen activity, offering firming and plumping benefits while boosting cellular energy for a brighter complexion.
The Red Seaweed & Tara Fruit Extract Complex forms a flexible, non-occlusive film on the skin that reinforces the barrier and enhances resilience, while Low Molecular Weight Hyaluronic Acid, High Molecular Weight Hyaluronic Acid and a Trio of Polysaccharides deliver hydration at every level of the skin.
Biologique Recherche Serum Yall~O2 is a rich face oil that plumps, hydrates and regenerates the skin. It combats dehydration and signs of ageing by enhancing skin fullness, leaving the complexion more energised and brighter.
Walnut Extract counteracts skin ageing by stimulating fibroblast activity and inhibiting elastase, preventing natural elastin from degrading and promoting a more elastic, smoother and toned skin with reduced fine lines.
Chaperone Proteins — produced by microorganisms from the Valaus Glacier — support elastin and collagen activity, offering firming and plumping benefits while boosting cellular energy for a brighter complexion.
The Red Seaweed & Tara Fruit Extract Complex forms a flexible, non-occlusive film on the skin that reinforces the barrier and enhances resilience, while Low Molecular Weight Hyaluronic Acid, High Molecular Weight Hyaluronic Acid and a Trio of Polysaccharides deliver hydration at every level of the skin.
Read less30 ml
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Is this for you?
For you if
- Wrinkles
- Loss of Firmness
- Loss of Volume
- Hyperpigmentation
- Pigmentation
- Dull Skin
- Acne Redness
- Damaged Barrier
- Dehydration
- Fine Lines
- Disrupted Microbiome
Suitable for
- Dehydrated Skin
- Dry Skin
- Balanced Skin
Not for you if
How to apply
Core Routine
- First Cleanse
- Second Cleanse
- Toner
- Hydrating Serum
- Targeted Serum
- Cream / Facial Oil
Period after opening
Extended Routine
- Eye Cleanse
- First Cleanse
- Second Cleanse
- Toner (Non-Exfoliating)
- Toner (Exfoliating)
- Mask
- Hydrating Serum
- Targeted Serum
- Eye Care
- Cream / Facial Oil
- SPF
Ingredients
Walnut ExtractAnti-Wrinkle · Firming & Lifting · Plumping
Walnut Extract counteracts skin ageing by stimulating fibroblast activity and inhibiting elastase. Meaning that it prevents the natural elastin in our skin from degrading, promoting a more elastic and smoother skin, whilst reducing fine lines & wrinkles and promoting a more toned skin. This ingredient also has powerful antioxidant properties which prevents cells from oxidative stress.Chaperone ProteinsAnti-Wrinkle · Firming & Lifting · Plumping
Chaperone Proteins, produced by microorganisms from the Valaus Glacier, have adapted to survive in extremely harsh conditions. In skincare, they support Elastin & Collagen activity, offering firming and plumping benefits. Additionally, they boost cellular energy, resulting in a brighter complexion.Kale Leaf ExtractAnti-Redness · Antioxidant
Kale Leaf Extract it supports skin vitality and radiance, while also offering mild soothing and conditioning benefits. Its vitamin profile helps reinforce overall skin health, leaving the complexion appearing brighter, more balanced and resilient.Red Seaweed & Tara Fruit Extract ComplexReduces Trans Epidermal Water Loss · Skin Barrier Strengthening
Red Seaweed and Tara Fruit Extract Complex combines a warm-water red algae native to Southeast Asia with Tara fruit extract, revered in South America as the “green gold of the Incas.” Rich in natural biopolymers, this complex forms a flexible, non-occlusive film on the skin or scalp surface, creating an invisible protective mesh. Its biomimetic structure reinforces the skin barrier, enhances resilience, and provides biomechanical protection against environmental stressors, all while maintaining breathability and comfort.Low Molecular Weight Hyaluronic AcidPlumping · Hydrating
Low Molecular Weight Hyaluronic Acid (LMW-HA) is a smaller, more penetrative form of hyaluronic acid. Unlike high molecular weight forms that primarily hydrate the skin’s surface, LMW-HA has the ability to penetrate deeper into the epidermis, where it attracts and binds water to maintain optimal moisture levels from within. This deep hydration helps improve skin elasticity, firmness and smoothness, while reducing the appearance of fine lines. Additionally, it enhances overall suppleness, making the complexion look plumper and more resilient. It is ideal for dehydrated, dull or mature skin, and especially those in need of long-lasting hydration and improved texture.High Moleclular Weight Hyaluronic Acid (Hyaluronic Acid)Reduces Trans Epidermal Water Loss
High Molecular Weight Hyaluronic Acid has a larger molecular size (>1000kDA), which tends to sit on the top layer of the skin, providing surface hydration and improving water retention. It acts as a potent humectant, drawing hydration from the environment into the skin, which helps to plump and smooth the skin's surface texture. Its larger size limits its ability to penetrate deeply into the skin compared to lower molecular weight Hyalurons, making it ideal for providing surface-enhancing hydration provided from other forms of hyalurons and maintaining skin suppleness.PolysaccharidesPlumping · Reduces Trans Epidermal Water Loss · Skin Barrier Strengthening
Polysaccharides are naturally occurring long-chain carbohydrates derived from plants, algae, fungi, or biotechnological fermentation. They are valued for their ability to hydrate, soothe, and protect the skin through their humectant and film-forming properties. By attracting and retaining moisture, they help strengthen the skin barrier, reduce transepidermal water loss, and leave the complexion feeling soft and supple. Many polysaccharides also possess soothing and anti-inflammatory effects, helping to calm irritation and support the skin’s natural repair processes, while some act as prebiotics to promote a balanced microbiome. They are especially beneficial for dry, sensitive, dehydrated, or compromised skin, as well as those exposed to environmental stressors.Soybean PhospholipidsAnti-Redness · Reduces Trans Epidermal Water Loss · Skin Barrier Strengthening
Soybean Phospholipids form a protective film on the surface of the skin, allowing the skin to be protected and to retain moisture. Furthermore, this ingredient also helps to restructure and repair cell membranes, allowing the reparation of damaged skin.
View full ingredient list
Smell & Texture
Delivery & Returns
ROYAL MAIL TRACKED 48:
£5.00 (free for members on orders over £75)
Delivered within 2-3 working days.
NEXT WORKING DAY DELIVERY:
£8.00 (free for members on orders over £150)
Delivered the next working day if ordered before 1pm.
SATURDAY UK DELIVERY:
£18.00
Delivered on Saturday when ordered before 1pm on Friday.
*(For NI, Channel Islands & Scotland - due to the courier service in place, we cannot guarantee next day delivery to these areas, however we expect you will receive your delivery within 2-5 days).
RETURNS
Items returned by post can take up to 14 working days to process. Credit notes can be applied to your account within 5 working days. For refunds, we will reimburse you using your original payment method which can take up to 14 days.
The Benefits
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Anti-Wrinkle
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Firming & Lifting
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Plumping
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Micro-Needling Effect
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Anti-Pigmentation
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Scar-Repairing
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Brightening (Energising)
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Anti-Redness
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Antioxidant
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Reduces Trans Epidermal Water Loss
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Skin Barrier Strengthening
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Hydrating
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Anti-Inflammatory
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Microbiome Balancing
Anti-Wrinkle
Firming & Lifting
Plumping
Micro-Needling Effect
Anti-Pigmentation
Scar-Repairing
Brightening (Energising)
Anti-Redness
Antioxidant
Reduces Trans Epidermal Water Loss
Skin Barrier Strengthening
Hydrating
Anti-Inflammatory
Microbiome Balancing
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+
Anti-Wrinkle
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-
+
Firming & Lifting
-
-
+
Plumping
-
-
+
Micro-Needling Effect
-
-
+
Anti-Pigmentation
-
-
+
Scar-Repairing
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-
+
Brightening (Energising)
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-
+
Anti-Redness
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-
+
Antioxidant
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+
Reduces Trans Epidermal Water Loss
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-
+
Skin Barrier Strengthening
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+
Hydrating
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+
Anti-Inflammatory
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+
Microbiome Balancing
Spotlight
The Biologique Recherche Proprietary Oxygenating Complex
Clinical Proofs
Clinical Proofs
Frequently Asked Questions
Where do I use this oil in my routine?
How often should I use this oil?
Can I use this oil instead of a cream?
Can I use this oil if I have oily skin?
Can I use this oil if I have dry skin?
Can I use this oil if I have sensitive skin?
Can this product be used pregnancy/breast feeding?
Does it contain allergens?
Is the packaging recyclable?
Is this product fragrance-free, cruelty-free, vegan-friendly?
Why I love it
X Natalie K-F
Founder, Embassy of Beauty







