COSRX The Hyaluronic Acid 3 Serum
COSRX The Hyaluronic Acid 3 Serum
COSRX The Hyaluronic Acid 3 Serum
COSRX The Hyaluronic Acid 3 Serum
COSRX The Hyaluronic Acid 3 Serum
COSRX

The Hyaluronic Acid 3 Serum 20ml

Save 15%
$44.20
$52.00
Only 1 remaining in stock!
  • Delivery
  • Click & Collect
In Stock - Free Shipping on orders $49.99 +
Estimated delivery: Wed, Aug 5th - Mon, Aug 10th

Free Click and collect is available at checkout. Orders are ready within 1 hour during opening hours. Store Address: 56 Parer Rd, Airport West, VIC Australia 3042 Phone (03) 9999 5902

Artists & Models Oval Styling Brush Gift
FREE Brushworx Oval Styling Brush
Valued at $29.95, free with all orders over $129.
Why You’ll love it
Dehydrated Skin
Ageing
Wrinkles & Loss of Firmness
Deeply hydrates and retains moisture for a dewy complexion
Perfect for dry and dehydrated skin types
Reduces wrinkles and enhances skin elasticity
Supports the skin's moisture barrier with NMF and ceramide
Description
Read more
Directions
Ingredients
  • Aqua Solvents
    Solvent

    The water base that carries and dissolves the other ingredients in most products.

    May suit

    All hair and skin types.

    Worth knowing

    Almost always the first ingredient listed in water-based products.

  • Butylene Glycol Humectants
    Humectant and solvent

    Butylene Glycol helps attract and hold moisture while improving the spreadability of hair products.

    May suit

    Those looking for hydrated, smoother-feeling hair or lighter-feeling formulations.

    Worth knowing

    It is commonly used to help ingredients dissolve and to give formulas a soft, glide-on texture. It appears in many leave-in and rinse-off products due to its versatility.

  • Propanediol Humectants
    Hydrating humectant

    Helps attract and hold moisture in hair and supports a smooth, conditioned feel.

    May suit

    Those wanting lightweight hydration without heaviness.

    Worth knowing

    It is often used as a gentle alternative to glycol-based humectants and can also help improve product texture and absorption.

  • Glycerin Humectants
    Humectant

    Attracts and holds water to help hair feel hydrated and soft.

    May suit

    Dry or dehydrated hair, and many curl and moisture routines.

    Worth knowing

    A very common, well-tolerated humectant used across countless products.

  • Sodium Hyaluronate Humectants
    Hydrating humectant

    Draws moisture into the hair and helps maintain hydration.

    May suit

    Those with dry, dehydrated or coarse hair seeking added softness and moisture retention.

    Worth knowing

    It is the salt form of hyaluronic acid and is widely used because it can hold many times its weight in water. In haircare, it helps support smoother, more manageable strands without adding heaviness.

  • Pentylene Glycol Humectants
    Humectant and solvent

    Helps attract and hold moisture while also improving the spreadability of a formula.

    May suit

    Those seeking lightweight hydration without heaviness.

    Worth knowing

    It also supports product texture and can enhance the performance of other ingredients in a formula.

  • 2-Hexanediol Solvents
    Solvent and humectant

    Helps dissolve other ingredients and provides light moisture to haircare formulas.

    May suit

    Those interested in lightweight, non-greasy formulas that spread easily.

    Worth knowing

    It is also used as a preservative booster to support formula stability.

  • Sodium Polyacryloyldimethyl Taurate Thickeners and stabilisers
    Polymer thickener and stabiliser

    A polymer used to thicken and stabilise haircare formulas for smooth, consistent texture.

    May suit

    Those who prefer products with a creamy, non-runny texture or improved spreadability.

    Worth knowing

    It helps formulas stay uniform and enhances the feel of gels, creams and leave‑ins. It is widely used because it creates stable textures without heaviness.

  • Betaine Conditioning agents
    Conditioning agent

    Helps condition and hydrate hair by supporting moisture balance.

    May suit

    Those looking for softer, smoother-feeling hair or gentle hydration.

    Worth knowing

    Betaine is a naturally occurring molecule often used to improve hair feel and support moisture retention. It can also help enhance the overall mildness of cleansing formulas.

  • Xanthan Gum Thickeners and stabilisers
    Thickener and stabiliser

    Xanthan Gum helps thicken and stabilise haircare formulas for a smooth, consistent texture.

    May suit

    People who prefer products with a richer or more gel-like texture.

    Worth knowing

    It is a polysaccharide widely used in cosmetics to keep formulas uniform and easy to apply. It works well alongside many other common ingredients.

  • Dimethicone Silicones
    Slip and shine agent

    Smooths the hair surface, adds slip and shine and helps reduce frizz.

    May suit

    Frizz-prone, coarse or dry hair wanting a smooth, glossy finish.

    Worth knowing

    Some people prefer silicone-free formulas, especially for certain curl routines. It is widely used and helpful in many smoothing products.

  • Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Thickeners and stabilisers
    Texture enhancer

    A polymer that helps thicken and stabilise haircare formulas for a smoother, more even texture.

    May suit

    People who prefer products with a silky, non-greasy feel or stable gel-like textures.

    Worth knowing

    It is often used to create lightweight gels and serums that spread easily without stickiness. It also helps maintain product consistency over time.

  • Sodium PCA Humectants
    Moisture-binding humectant

    Sodium PCA helps attract and hold moisture in the hair and scalp.

    May suit

    Those looking to improve hair hydration, softness, or manageability.

    Worth knowing

    It is a component of the skin and scalp’s natural moisturising factors and is well tolerated in most formulations.

  • Sodium Lactate Humectants
    Moisture-binding humectant

    Helps attract and hold moisture in the hair and scalp.

    May suit

    Those seeking added hydration, improved manageability, or support for dry scalp.

    Worth knowing

    It is a salt of lactic acid often used to enhance moisture retention and support a balanced formula. It can also contribute mild pH-buffering benefits depending on the product.

  • Pyrrolidone Carboxylic Acid Humectants
    Moisture-binding humectant

    A humectant that helps attract and hold moisture in the hair and scalp.

    May suit

    Those with dry or dehydrated hair seeking improved softness and manageability.

    Worth knowing

    PCA is related to naturally occurring moisturising factors found in skin and hair. It is often used alongside other humectants for balanced hydration.

  • Hydrogenated Lecithin Conditioning agents
    Emollient and conditioning agent

    Helps condition the hair and support smooth, stable formulations.

    May suit

    People looking for products that enhance softness and manageability.

    Worth knowing

    It is a hydrogenated form of lecithin that can improve texture and support the delivery of other ingredients. Commonly used in both skincare and haircare for its smoothing feel.

  • Ethylhexylglycerin Preservatives
    Preservative booster

    Helps support the preservation system and can provide mild skin-conditioning benefits.

    May suit

    Those interested in gentle preservation systems or sensitive scalps may find it relevant.

    Worth knowing

    It is often paired with other preservatives to improve their effectiveness while allowing for lower usage levels. It also has light moisturising and conditioning properties.

  • Serine Proteins and amino acids
    Amino acid conditioner

    Serine is an amino acid used to support moisture balance and improve the feel of hair.

    May suit

    Those seeking lightweight hydration or formulas that help smooth and soften hair.

    Worth knowing

    Amino acids like serine are often included in conditioning or strengthening blends to complement other hair-hydrating ingredients. They can be used in many types of haircare from shampoos to treatments.

  • Alanine Proteins and amino acids
    Amino acid conditioner

    Alanine is an amino acid used to help condition and support hair feel and manageability.

    May suit

    People looking for gentle conditioning ingredients or formulas designed to support softness without heaviness.

    Worth knowing

    Amino acids like alanine are often included in haircare to complement protein or moisture-focused formulas. They can contribute to a smooth, hydrated feel.

  • Glycine Proteins and amino acids
    Amino acid

    An amino acid that helps support hair softness and overall hair fibre condition.

    May suit

    Those looking to improve hair manageability or support moisture balance.

    Worth knowing

    Glycine is often included as part of amino acid blends used to condition and reinforce the hair fibre. It can also appear in gentle cleansing systems and care-focused formulations.

  • Sodium Phytate Chelating agents
    Chelating agent

    Helps bind metal ions to support product stability and performance.

    May suit

    People who want formulas that perform consistently in hard-water environments.

    Worth knowing

    It is a plant-derived option often used as a gentler alternative to traditional chelators. It can also support the effectiveness of preservatives and surfactants.

  • Sorbitan Isostearate Thickeners and stabilisers
    Emulsifier

    Helps blend oil- and water-based ingredients to create a smooth, stable formula.

    May suit

    Those interested in products with a consistent, creamy texture.

    Worth knowing

    It is commonly used to improve product stability and spreadability in both haircare and skincare. It can also support the even distribution of other ingredients through the hair.

  • Glutamic Acid Proteins and amino acids
    Amino acid conditioning agent

    An amino acid used to help condition hair and support moisture balance.

    May suit

    People looking for formulas that help smooth and soften hair without heaviness.

    Worth knowing

    Amino acids like glutamic acid can support the hair’s natural structure and improve the feel of conditioners and treatments. They are commonly used in both rinse-off and leave-in products.

  • Citric Acid pH adjusters
    pH adjuster

    Fine-tunes the product pH, which can help the hair surface feel smooth.

    May suit

    Most hair types as part of a balanced formula.

    Worth knowing

    Usually present in small amounts to balance the formula.

  • Lysine Hydrochloride Proteins and amino acids
    Amino acid

    An amino acid used to support hair strength and moisture balance.

    May suit

    Those looking for formulas that help maintain hair resilience or support overall conditioning.

    Worth knowing

    Amino acids like lysine are often included in haircare to complement protein-based or strengthening formulations. They can contribute to a smoother, more conditioned feel.

  • Threonine Proteins and amino acids
    Amino acid

    Threonine is an amino acid used to support hair conditioning and strength.

    May suit

    Those looking for formulas that help maintain softness and support the hair’s protein structure.

    Worth knowing

    Amino acids are often included in haircare to help improve the feel and manageability of the hair fibre. They can complement other conditioning and strengthening ingredients in a formula.

  • Arginine Proteins and amino acids
    Amino acid

    An amino acid used to support hair strength and maintain moisture balance.

    May suit

    Those looking for formulas that help with hair resilience or hydration.

    Worth knowing

    Arginine is naturally present in the hair’s keratin structure and is commonly added to strengthening or repairing products. It is also used in some formulations to help support scalp comfort.

  • Proline Proteins and amino acids
    Amino acid conditioner

    An amino acid that helps support hair feel, softness and overall conditioning.

    May suit

    Those looking for formulas that help improve hair manageability or support lightly replenishing treatments.

    Worth knowing

    Amino acids like proline are often included in small amounts to complement conditioning systems and support the hair’s natural protein structure.

  • Ceramide NP Conditioning agents
    Hair-conditioning lipid

    A ceramide that helps reinforce the hair’s protective barrier and support moisture retention.

    May suit

    Those with dry, damaged or chemically treated hair seeking smoother, more resilient strands.

    Worth knowing

    Ceramides are lipids naturally present in hair and are often added to formulations to help improve feel and manageability. They can complement conditioning agents by supporting the hair’s surface structure.

  • Cholesterol Conditioning agents
    Lipid-based conditioning agent

    Cholesterol helps condition and soften the hair by supporting the hair's natural lipid layer.

    May suit

    Those with dry, damaged, chemically treated or highly textured hair may appreciate its softening and replenishing effect.

    Worth knowing

    Cholesterol is a naturally occurring lipid that can enhance flexibility and reduce dryness in hair formulations. It is often used alongside other conditioning agents to support overall hair manageability.

  • Caprylic/Capric Triglyceride Oils and butters
    Lightweight emollient

    A lightweight emollient that helps soften and smooth the hair without heaviness.

    May suit

    Those wanting conditioning benefits that do not weigh hair down, including fine or easily-greasy hair types.

    Worth knowing

    It is commonly derived from coconut oil and glycerin and is valued for its silky, non-greasy feel. It is widely used in both skincare and haircare for its gentle, versatile performance.

  • Phytosphingosine Anti-dandruff / scalp care
    Scalp-supporting lipid

    A naturally occurring lipid that helps support the scalp's barrier and maintain a balanced environment.

    May suit

    People looking to soothe or balance the scalp, or support barrier-focused formulations.

    Worth knowing

    It is often included in products designed to calm the scalp and reinforce its natural defences. It pairs well with gentle cleansers and conditioning systems.

  • Stearic Acid Thickeners and stabilisers
    Thickener and stabiliser

    A fatty acid that helps thicken and stabilise formulations while adding a soft, conditioned feel.

    May suit

    Those who prefer richer, creamier textures in conditioners and styling products.

    Worth knowing

    It is commonly used to give products structure and improve spreadability. It can be derived from plant or animal sources, with most haircare brands typically using plant-based forms.

  • Oleic Acid Oils and butters
    Emollient fatty acid

    Oleic Acid is a fatty acid that helps soften and smooth the hair and scalp.

    May suit

    Those looking for nourishment or softness, particularly for dry or coarse hair types.

    Worth knowing

    It is naturally found in many plant oils and is commonly used to support hair softness and flexibility.

  • Alcohol Solvents
    Solvent and drying agent

    Helps dissolve other ingredients and can aid quick drying in styling products.

    May suit

    Those using sprays or styling products that benefit from fast evaporation.

    Worth knowing

    In haircare, this typically refers to ethanol or denatured alcohol, which helps formulas feel lighter and dry faster. Its effect depends on the overall product balance and supporting conditioning ingredients.

  • Tocopherol Preservatives
    Antioxidant

    An antioxidant that helps support product stability and can provide conditioning benefits to hair.

    May suit

    Those wanting added nourishment or antioxidant support in their haircare routine.

    Worth knowing

    Tocopherol is commonly included to help protect oils in a formula from oxidising and to offer light conditioning benefits. It is widely used in both skincare and haircare products.

  • Lactic Acid pH adjusters
    pH adjuster

    Helps adjust and maintain the product’s pH for optimal performance.

    May suit

    Those looking for formulas that help smooth the cuticle or gently refine the scalp surface.

    Worth knowing

    Lactic Acid can also provide mild hydrating and smoothing benefits in haircare. Its pH-balancing role helps support product stability and performance.

  • Caprylyl Glycol Humectants
    Humectant

    Helps attract and hold moisture in hair and scalp while supporting product stability.

    May suit

    Those looking for added hydration or smoother-feeling hair.

    Worth knowing

    It is also commonly used as a preservative booster to help maintain formula freshness. It is well tolerated in most haircare products.

Questions and Answers

Questions and Answers

Write A Question
Name
E-mail
Your Question
Reviews
Write a review
Your evaluation
Name
E-mail
Your Review
Find your product in seconds!
Haircare
Skincare
Makeup