LANEIGE Water Bank Blue Hyaluronic Serum — Hydratation Clinique Ultra-Pénétrante

The serum Water Bank Blue relies on a hydration technology supported by clinical studies. Three active ingredients orchestrate a measurable effect:

Blue Hyaluronic Acid (Hydrolyzed Hyaluronic Acid, 0.5kDa) : fermented with deep marine algae (Undaria Pinnatifida Extract), this fragmented hyaluronic acid is 2000 times smaller than classic HA (1000kDa). Its rapid penetration ability was measured in a study on 32 women (P&K Skin Research Center, 2021): +575% plumping hydration and skin barrier repair upon application.

Biomimetic peptide (Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate) : this low molecular weight tripeptide stimulates endogenous hyaluronic acid synthesis in the dermis. It improves visible firmness by strengthening structural proteoglycans (decorin, lumican).

Green tea enzyme (Lactobacillus Ferment Lysate) : this fermented extract gently exfoliates dead cells while reinforcing the hydrolipidic film. Combined with Beta-Glucan polysaccharide, it soothes reactive epidermis.

☀️ Morning routine

1. Cleanse your face, then apply a toner to balance the pH
2. Take 2-3 pumps of the Water Bank Blue serum into your palm
3. Warm the product between your hands, then apply from the center outward on your face
4. Gently pat with your palms (cheeks, forehead, chin) to promote absorption
5. Seal with your usual moisturizer, then protect with an SPF

🌙 Evening routine

1. Remove makeup, cleanse, tone
2. Apply the Water Bank Blue serum with 2-3 pumps, using the same motion as in the morning
3. Layer a targeted treatment (retinol, vitamin C) if needed, or go straight to your night cream
4. To boost the overnight effect, you can layer with the Water Bank Blue Hyaluronic Cream from the same system

This serum is intended for the following profiles:

• Chronically dehydrated skin that feels tight despite using rich creams — micro-fragmented hyaluronic acid penetrates deeply where traditional formulas remain on the surface
• Dull skin seeking instant radiance : the "juicy" texture visibly plumps the skin texture from the first application
• Dermatologically tested sensitive skin : hypoallergenic, paraben-free, this serum is suitable for reactive skin (official LANEIGE claim)
• Fans of K-beauty layering looking for a lightweight hydrating base to layer other actives (vitamin C, niacinamide, retinol)
• Eco-conscious users : the bottle is refillable, reducing plastic consumption by 70% compared to a new standard size

Use with caution if: you have very oily skin that reacts poorly to rich textures — although the serum is lightweight, some reviews mention a noticeable fragrance that may bother sensitive noses.

The documented clinical results speak for themselves:

From the first application : the P&K Skin Research Center study (32 women, ages 20-35, June 2021) measured a +575% immediate plumping hydration increase. The complexion appears rosy, and the skin texture is smoothed.

After 1 week : morning tightness disappears. The skin barrier strengthens, and temporary redness decreases by 92% (LANEIGE data on 30 women).

After 4 weeks of daily use : visible firmness improves thanks to the peptide stimulating endogenous hyaluronic acid synthesis. Dehydration fine lines diminish, and the glass skin radiance becomes noticeable.

The 50ml size corresponds to about 2-3 months of twice-daily use. The fluid texture absorbs in 30 seconds without leaving a sticky film, making layering with other treatments easier.

What is the difference between the Water Bank Blue Hyaluronic Serum and the Water Bank Cream?

The serum contains the most fragmented hyaluronic acid in the range (0.5kDa) for rapid deep penetration, while the cream combines multiple molecular weights of HA with ceramides and squalane to lock in hydration on the surface. The serum is applied before the cream in a full Water Bank routine but can also be used alone under your usual cream.

Can I use this serum if I already have a vitamin C or retinol serum?

Yes, the Water Bank Blue layers perfectly. Apply it right after your toner, then wait 30 seconds before layering your active treatment (vitamin C in the morning, retinol in the evening). Its neutral pH and water-based formula do not interfere with other actives. However, avoid mixing multiple serums in your palm before application.

Is the serum suitable for oily or combination skin?

Absolutely. Despite its rich hydration, the "juicy" texture is light and non-greasy. LANEIGE states it is suitable for all skin types. However, if your T-zone is very reactive, focus application on the cheeks and eye contour where dehydration is more common.

How long does a 50ml bottle last?

With 2-3 pumps morning and evening, a bottle lasts on average 2.5 to 3 months. If you use it only in the evening or as a short course (dry climate, post-peeling), you can extend it to 4-5 months. The bottle is refillable: remember to order a refill to reduce your plastic impact.

Is the fragrance very strong?

Yes, several users on Cult Beauty mention a noticeable fragrance. If you are sensitive to scents, test first on a small area. The fragrance fades after absorption (about 1 minute) but remains noticeable upon application. LANEIGE specifies that the formula is hypoallergenic despite the presence of fragrance.

Can I use it alongside the Water Bank Intensive Moisturizer?

It is even recommended for extra-dry skin or in winter. The serum provides deep hydration thanks to the micro-fragmented Blue HA, while the Intensive Moisturizer (with Omega Peptide Complex and cica) seals everything with a rich balm texture. It’s the perfect duo for distressed skin post-dermatologist or in polar climates.

LANEIGE (from the French "la neige") has cultivated an obsession since 1994: the science of water. In its Seoul laboratories, the brand has been conducting research on skin hydration for over 25 years and developing patented aqueous complexes. The Water Bank range, initially launched with classic hyaluronic acid, underwent a major overhaul with the introduction of Blue Hyaluronic Acid in 2021.

This famous Blue HA is born from a fermentation process with deep-sea algae (Undaria Pinnatifida) followed by a 10-step microfiltration. The result: a fragmented hyaluronic acid at 0.5kDa (versus 1000kDa for standard HA), which is 2000 times smaller in size. This innovation allows documented penetration into the deeper layers of the epidermis, validated by the clinical study from P&K Skin Research Center.

Today, LANEIGE is also committed to eco-design: all Water Bank moisturizers are available in refillable pods, reducing plastic consumption by 70%. A K-beauty approach that combines scientific rigor and environmental responsibility.

Discover the entire LANEIGE range

Full INCI: Water/Aqua/Eau, Butylene Glycol, Dipropylene Glycol, Glycerin, Squalane, 1,2-Hexanediol, Ammonium Acryloyldimethyltaurate/VP Copolymer, Propanediol, Carbomer, Cetearyl Alcohol, Tromethamine, Polyglyceryl-3 Methylglucose Distearate, Dextrin, Hydrogenated Lecithin, Ethylhexylglycerin, Fragrance/Parfum, Glyceryl Stearate Citrate, Disodium EDTA, Betaine, Hydrolyzed Hyaluronic Acid, Beta-Glucan, Xylitylglucoside, Anhydroxylitol, Xylitol, Lactobacillus Ferment Lysate, Glucose, Tocopherol (Vitamin E), Magnesium Chloride, Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate, Undaria Pinnatifida Extract (marine algae).

Key Actives:

• Hydrolyzed Hyaluronic Acid (0.5kDa) : fragmented hyaluronic acid fermented with marine algae, ultra-fast penetration
• Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate : biomimetic peptide stimulating endogenous HA synthesis
• Lactobacillus Ferment Lysate : fermented green tea enzyme, gentle exfoliation + barrier strengthening
• Beta-Glucan : soothing polysaccharide extracted from fungal/yeast cell walls
• Squalane : biomimetic emollient replicating natural sebum
• Betaine : hydrating amino acid derived from beetroot

Clean(ish) formula: free from parabens, SLS/SLES sulfates, mineral oils, formaldehydes, phthalates. Contains synthetic fragrance (Fragrance/Parfum). Dermatologically tested hypoallergenic according to LANEIGE, but sensitive noses may react.