COS DE BAHA H Hyaluronic Acid 1% Serum – Korean Intensive Hydration & Plumping Care

• Product type: Hyaluronic acid hydrating facial serum
• Size / volume: 30 ml / 1.0 fl. oz.
• Primary concerns: Dehydration, moisture loss, dryness, tightness, dehydration-related fine lines and loss of visible plumpness
• Skin types: Suitable for all skin types, including sensitive skin, according to the manufacturer
• Key concentration: 1% hyaluronic acid / sodium hyaluronate (10,000 ppm)
• Key ingredients: Purified water, sodium hyaluronate and 1,2-hexanediol
• Molecular weight: High-molecular-weight hyaluronic acid, approximately 1,500 kDa
• pH level: 6.5
• Texture: Lightweight hydrating serum designed to provide moisture without a heavy feel
• Finish: Supple, smooth, hydrated and visibly plumped-looking
• Formula notes: Minimalist three-ingredient formula; free from parabens, gluten, formaldehyde, fragrance, sulfates and artificial color according to the manufacturer
• Usage: Apply an appropriate or moderate amount and gently pat into the skin until fully absorbed
• Routine placement: May be used morning or evening; apply after cleansing and toner and before moisturizer to help seal in hydration
• Origin: Made in South Korea
• Storage: Keep tightly closed and store away from excessive heat and direct sunlight
• Caution: Patch test on a small area and wait approximately 24 hours before regular use, particularly with very sensitive skin or uncommon allergies. For external use only; avoid direct eye contact and discontinue use if persistent irritation develops

Core Product Details

1% Hyaluronic Acid for an Intense Infusion of Moisture

COS DE BAHA H Hyaluronic Acid 1% Serum distils the art of hydration into an exceptionally pure South Korean skincare ritual. Formulated with 1% hyaluronic acid, equivalent to 10,000 ppm, this minimalist serum is created to replenish moisture without burdening the complexion with a heavy feel. As hydration embraces the skin, the complexion appears softer, smoother and beautifully plumped, making this Korean hyaluronic acid serum an elegant essential for dry, dehydrated or moisture-depleted skin.

A Remarkably Minimalist Three-Ingredient Formula

There is beauty in restraint. The verified formula contains just three ingredients: purified water, sodium hyaluronate and 1,2-hexanediol. With no elaborate botanical blend competing for attention, sodium hyaluronate becomes the unmistakable focus of the ritual. This streamlined composition is especially alluring for beauty lovers who prefer uncomplicated hydration and want to introduce moisture into a layered K-Beauty routine without surrounding it with an extensive collection of additional actives.

High-Molecular-Weight Hyaluronic Acid for Surface Hydration

COS DE BAHA identifies the serum's hyaluronic acid as high molecular weight at approximately 1,500 kDa. Sodium hyaluronate acts as a humectant, helping bind water at the skin's surface and supporting a complexion that feels comfortably hydrated and appears more supple. Rather than adding richness through oils or heavy emollients, H Serum focuses on moisture itself—the fresh, cushiony sensation that gives dehydrated skin a smoother and more luminous appearance.

Plumpness That Makes Fine Lines Appear Softer

When the complexion lacks moisture, fine lines can appear more pronounced and skin can lose some of its fresh, bouncy appearance. By supporting surface hydration, this 1% hyaluronic acid serum helps create a visibly plumper, firmer-looking effect and can soften the appearance of dehydration-related lines. The transformation is sensorial as much as visual: skin feels quenched rather than coated, with the supple finish associated with a thoughtfully layered Korean glass-skin ritual.

pH 6.5 & Created for Every Skin Type

The manufacturer specifies a pH level of 6.5 and positions H Serum for all skin types, including sensitive skin. Its uncomplicated hydration-first approach allows it to fit gracefully into routines for dry, combination or oily complexions alike. As with any new skincare product, particularly on highly reactive skin, COS DE BAHA recommends performing a small patch test and observing the area for approximately 24 hours before broader application.

A Daily Hydration Layer, Morning or Evening

Apply an appropriate amount after cleansing and toning, gently patting the serum into the complexion until absorbed before following with moisturizer. COS DE BAHA specifies that its Hyaluronic Acid Serum may be used day or night, allowing the three-ingredient formula to become an effortless source of hydration whenever skin desires it. Layered beneath cream, it creates a moisture-focused ritual that feels uncomplicated, intimate and beautifully indulgent.

Pure Korean Hydration, Distilled to Its Essential Form

Made in South Korea, COS DE BAHA H Hyaluronic Acid 1% Serum captures a quieter expression of K-Beauty—one where radiance begins with moisture rather than excess. A concentrated 1% hyaluronic acid formula and just three carefully selected ingredients transform a simple serum step into a daily devotion to softness and suppleness. The pleasure lies in the purity of the experience: weightless hydration meeting thirsty skin and leaving behind a complexion that looks fresh, smooth, plumped and naturally luminous.

FAQ

What does COS DE BAHA H Hyaluronic Acid 1% Serum do?

It provides concentrated surface hydration to help skin feel softer and more supple while creating a plumper, smoother-looking appearance. Increased hydration can also help soften the visible appearance of fine lines associated with dehydration.

How much hyaluronic acid is in COS DE BAHA H Serum?

The manufacturer specifies a 1% hyaluronic acid concentration, equivalent to 10,000 ppm, using high-molecular-weight hyaluronic acid at approximately 1,500 kDa.

Is COS DE BAHA Hyaluronic Acid Serum suitable for sensitive skin?

COS DE BAHA identifies the serum as suitable for all skin types, including sensitive skin. The formula contains only purified water, sodium hyaluronate and 1,2-hexanediol, although patch testing is still recommended because individual sensitivities can occur.

Can I use COS DE BAHA H Hyaluronic Acid Serum every day?

Yes. The manufacturer states that the serum may be used during the day or at night. Apply it within your hydrating skincare routine after cleansing and toner and follow with moisturizer.

Does COS DE BAHA H Serum contain fragrance?

No added fragrance is listed in the verified three-ingredient formula. COS DE BAHA also identifies the product as free from fragrance, parabens, gluten, formaldehyde, sulfates and artificial color.

Drench Your Skin in the Beauty of Pure Hydration

When your complexion desires moisture without complication, let COS DE BAHA H Hyaluronic Acid 1% Serum become its daily indulgence. With 10,000 ppm hyaluronic acid captured in an exquisitely minimal South Korean formula, each application invites skin to feel softer, look plumper and reveal the fresh luminosity that only beautifully hydrated skin can possess.