The Hyaluronic Acid 3 Serum 20ml
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Delivery
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Click & Collect
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
Quench your skin's thirst with COSRX The Hyaluronic Acid 3 Serum, an intensely hydrating serum formulated with 3% pure hyaluronic acid. This serum is expertly crafted to penetrate deeply into the skin thanks to its low molecular weight hyaluronic acid, ensuring long-lasting hydration and a visibly plump, dewy complexion. Its lightweight, fluid texture is designed to significantly boost your skin's moisture levels, effectively diminishing the appearance of wrinkles and enhancing skin elasticity, for a firmer, smoother look.
This serum is not just about hydration; it's also about strengthening your skin's defenses. Infused with NMF (Amino Acid Complex) and ceramide, it works to fortify the skin's moisture barrier, offering protection against external stressors. Ideal for those with dry and dehydrated skin, COSRX The Hyaluronic Acid 3 Serum promises a rejuvenated, hydrated, and youthful complexion.
How To Use COSRX The Hyaluronic Acid 3 Serum
Apply a few drops to the skin. Use fingertips to gently massage and absrob the serum starting from the inside of the face and working towards the edges. Can be used for both morning and/or evening.
COSRX The Hyaluronic Acid 3 Serum Ingredients
Water, Butylene Glycol, Propanediol, Glycerin, Sodium Hyaluronate(3%), Pentylene Glycol, 1,2-Hexanediol, Diethoxyethyl Succinate, Sodium Polyacryloyldimethyl Taurate, Betaine, Xanthan Gum, Dimethicone, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Sodium PCA, Sodium Lactate, PCA, Glyceryl Acrylate/Acrylic Acid Copolymer, Hydrogenated Lecithin, Ethylhexylglycerin, Serine, Alanine, Glycine, Sodium Phytate, Sorbitan Isostearate, PVM/MA Copolymer, Glutamic Acid, Citric Acid, Lysine HCl, Threonine, Arginine, Sodium Methyl Stearoyl Taurate, Proline, Ceramide NP, Cholesterol, Caprylic/Capric Triglyceride, Phytosphingosine, Stearic Acid, Oleic Acid, Alcohol, Tocopherol, Lactic Acid, Caprylyl Glycol, Caprylhydroxamic Acid
Occasionally, product packaging and ingredients are updated without notice. For the most accurate information please check the product packaging.
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Aqua SolventsSolvent
The water base that carries and dissolves the other ingredients in most products.
May suitAll hair and skin types.
Worth knowingAlmost always the first ingredient listed in water-based products.
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Butylene Glycol HumectantsHumectant and solvent
Butylene Glycol helps attract and hold moisture while improving the spreadability of hair products.
May suitThose looking for hydrated, smoother-feeling hair or lighter-feeling formulations.
Worth knowingIt 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.
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Propanediol HumectantsHydrating humectant
Helps attract and hold moisture in hair and supports a smooth, conditioned feel.
May suitThose wanting lightweight hydration without heaviness.
Worth knowingIt is often used as a gentle alternative to glycol-based humectants and can also help improve product texture and absorption.
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Glycerin HumectantsHumectant
Attracts and holds water to help hair feel hydrated and soft.
May suitDry or dehydrated hair, and many curl and moisture routines.
Worth knowingA very common, well-tolerated humectant used across countless products.
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Sodium Hyaluronate HumectantsHydrating humectant
Draws moisture into the hair and helps maintain hydration.
May suitThose with dry, dehydrated or coarse hair seeking added softness and moisture retention.
Worth knowingIt 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.
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Pentylene Glycol HumectantsHumectant and solvent
Helps attract and hold moisture while also improving the spreadability of a formula.
May suitThose seeking lightweight hydration without heaviness.
Worth knowingIt also supports product texture and can enhance the performance of other ingredients in a formula.
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2-Hexanediol SolventsSolvent and humectant
Helps dissolve other ingredients and provides light moisture to haircare formulas.
May suitThose interested in lightweight, non-greasy formulas that spread easily.
Worth knowingIt is also used as a preservative booster to support formula stability.
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Sodium Polyacryloyldimethyl Taurate Thickeners and stabilisersPolymer thickener and stabiliser
A polymer used to thicken and stabilise haircare formulas for smooth, consistent texture.
May suitThose who prefer products with a creamy, non-runny texture or improved spreadability.
Worth knowingIt 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.
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Betaine Conditioning agentsConditioning agent
Helps condition and hydrate hair by supporting moisture balance.
May suitThose looking for softer, smoother-feeling hair or gentle hydration.
Worth knowingBetaine 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.
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Xanthan Gum Thickeners and stabilisersThickener and stabiliser
Xanthan Gum helps thicken and stabilise haircare formulas for a smooth, consistent texture.
May suitPeople who prefer products with a richer or more gel-like texture.
Worth knowingIt is a polysaccharide widely used in cosmetics to keep formulas uniform and easy to apply. It works well alongside many other common ingredients.
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Dimethicone SiliconesSlip and shine agent
Smooths the hair surface, adds slip and shine and helps reduce frizz.
May suitFrizz-prone, coarse or dry hair wanting a smooth, glossy finish.
Worth knowingSome people prefer silicone-free formulas, especially for certain curl routines. It is widely used and helpful in many smoothing products.
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Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Thickeners and stabilisersTexture enhancer
A polymer that helps thicken and stabilise haircare formulas for a smoother, more even texture.
May suitPeople who prefer products with a silky, non-greasy feel or stable gel-like textures.
Worth knowingIt is often used to create lightweight gels and serums that spread easily without stickiness. It also helps maintain product consistency over time.
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Sodium PCA HumectantsMoisture-binding humectant
Sodium PCA helps attract and hold moisture in the hair and scalp.
May suitThose looking to improve hair hydration, softness, or manageability.
Worth knowingIt is a component of the skin and scalp’s natural moisturising factors and is well tolerated in most formulations.
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Sodium Lactate HumectantsMoisture-binding humectant
Helps attract and hold moisture in the hair and scalp.
May suitThose seeking added hydration, improved manageability, or support for dry scalp.
Worth knowingIt 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.
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Pyrrolidone Carboxylic Acid HumectantsMoisture-binding humectant
A humectant that helps attract and hold moisture in the hair and scalp.
May suitThose with dry or dehydrated hair seeking improved softness and manageability.
Worth knowingPCA is related to naturally occurring moisturising factors found in skin and hair. It is often used alongside other humectants for balanced hydration.
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Hydrogenated Lecithin Conditioning agentsEmollient and conditioning agent
Helps condition the hair and support smooth, stable formulations.
May suitPeople looking for products that enhance softness and manageability.
Worth knowingIt 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.
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Ethylhexylglycerin PreservativesPreservative booster
Helps support the preservation system and can provide mild skin-conditioning benefits.
May suitThose interested in gentle preservation systems or sensitive scalps may find it relevant.
Worth knowingIt is often paired with other preservatives to improve their effectiveness while allowing for lower usage levels. It also has light moisturising and conditioning properties.
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Serine Proteins and amino acidsAmino acid conditioner
Serine is an amino acid used to support moisture balance and improve the feel of hair.
May suitThose seeking lightweight hydration or formulas that help smooth and soften hair.
Worth knowingAmino 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.
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Alanine Proteins and amino acidsAmino acid conditioner
Alanine is an amino acid used to help condition and support hair feel and manageability.
May suitPeople looking for gentle conditioning ingredients or formulas designed to support softness without heaviness.
Worth knowingAmino acids like alanine are often included in haircare to complement protein or moisture-focused formulas. They can contribute to a smooth, hydrated feel.
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Glycine Proteins and amino acidsAmino acid
An amino acid that helps support hair softness and overall hair fibre condition.
May suitThose looking to improve hair manageability or support moisture balance.
Worth knowingGlycine 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.
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Sodium Phytate Chelating agentsChelating agent
Helps bind metal ions to support product stability and performance.
May suitPeople who want formulas that perform consistently in hard-water environments.
Worth knowingIt is a plant-derived option often used as a gentler alternative to traditional chelators. It can also support the effectiveness of preservatives and surfactants.
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Sorbitan Isostearate Thickeners and stabilisersEmulsifier
Helps blend oil- and water-based ingredients to create a smooth, stable formula.
May suitThose interested in products with a consistent, creamy texture.
Worth knowingIt 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.
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Glutamic Acid Proteins and amino acidsAmino acid conditioning agent
An amino acid used to help condition hair and support moisture balance.
May suitPeople looking for formulas that help smooth and soften hair without heaviness.
Worth knowingAmino 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.
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Citric Acid pH adjusterspH adjuster
Fine-tunes the product pH, which can help the hair surface feel smooth.
May suitMost hair types as part of a balanced formula.
Worth knowingUsually present in small amounts to balance the formula.
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Lysine Hydrochloride Proteins and amino acidsAmino acid
An amino acid used to support hair strength and moisture balance.
May suitThose looking for formulas that help maintain hair resilience or support overall conditioning.
Worth knowingAmino acids like lysine are often included in haircare to complement protein-based or strengthening formulations. They can contribute to a smoother, more conditioned feel.
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Threonine Proteins and amino acidsAmino acid
Threonine is an amino acid used to support hair conditioning and strength.
May suitThose looking for formulas that help maintain softness and support the hair’s protein structure.
Worth knowingAmino 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.
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Arginine Proteins and amino acidsAmino acid
An amino acid used to support hair strength and maintain moisture balance.
May suitThose looking for formulas that help with hair resilience or hydration.
Worth knowingArginine 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.
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Proline Proteins and amino acidsAmino acid conditioner
An amino acid that helps support hair feel, softness and overall conditioning.
May suitThose looking for formulas that help improve hair manageability or support lightly replenishing treatments.
Worth knowingAmino acids like proline are often included in small amounts to complement conditioning systems and support the hair’s natural protein structure.
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Ceramide NP Conditioning agentsHair-conditioning lipid
A ceramide that helps reinforce the hair’s protective barrier and support moisture retention.
May suitThose with dry, damaged or chemically treated hair seeking smoother, more resilient strands.
Worth knowingCeramides 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.
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Cholesterol Conditioning agentsLipid-based conditioning agent
Cholesterol helps condition and soften the hair by supporting the hair's natural lipid layer.
May suitThose with dry, damaged, chemically treated or highly textured hair may appreciate its softening and replenishing effect.
Worth knowingCholesterol 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.
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Caprylic/Capric Triglyceride Oils and buttersLightweight emollient
A lightweight emollient that helps soften and smooth the hair without heaviness.
May suitThose wanting conditioning benefits that do not weigh hair down, including fine or easily-greasy hair types.
Worth knowingIt 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.
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Phytosphingosine Anti-dandruff / scalp careScalp-supporting lipid
A naturally occurring lipid that helps support the scalp's barrier and maintain a balanced environment.
May suitPeople looking to soothe or balance the scalp, or support barrier-focused formulations.
Worth knowingIt is often included in products designed to calm the scalp and reinforce its natural defences. It pairs well with gentle cleansers and conditioning systems.
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Stearic Acid Thickeners and stabilisersThickener and stabiliser
A fatty acid that helps thicken and stabilise formulations while adding a soft, conditioned feel.
May suitThose who prefer richer, creamier textures in conditioners and styling products.
Worth knowingIt 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.
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Oleic Acid Oils and buttersEmollient fatty acid
Oleic Acid is a fatty acid that helps soften and smooth the hair and scalp.
May suitThose looking for nourishment or softness, particularly for dry or coarse hair types.
Worth knowingIt is naturally found in many plant oils and is commonly used to support hair softness and flexibility.
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Alcohol SolventsSolvent and drying agent
Helps dissolve other ingredients and can aid quick drying in styling products.
May suitThose using sprays or styling products that benefit from fast evaporation.
Worth knowingIn 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.
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Tocopherol PreservativesAntioxidant
An antioxidant that helps support product stability and can provide conditioning benefits to hair.
May suitThose wanting added nourishment or antioxidant support in their haircare routine.
Worth knowingTocopherol 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.
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Lactic Acid pH adjusterspH adjuster
Helps adjust and maintain the product’s pH for optimal performance.
May suitThose looking for formulas that help smooth the cuticle or gently refine the scalp surface.
Worth knowingLactic Acid can also provide mild hydrating and smoothing benefits in haircare. Its pH-balancing role helps support product stability and performance.
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Caprylyl Glycol HumectantsHumectant
Helps attract and hold moisture in hair and scalp while supporting product stability.
May suitThose looking for added hydration or smoother-feeling hair.
Worth knowingIt is also commonly used as a preservative booster to help maintain formula freshness. It is well tolerated in most haircare products.