COSRX The 6 Peptide Skin Booster Serum
COSRX The 6 Peptide Skin Booster Serum
COSRX The 6 Peptide Skin Booster Serum
COSRX The 6 Peptide Skin Booster Serum
COSRX

The 6 Peptide Skin Booster Serum 150ml

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$46.75
$55.00
Only 2 remaining in stock!
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Estimated delivery: Tue, Aug 18th - Mon, Aug 24th

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

Why You’ll love it
All Skin Types
Boosts collagen production to reduce fine lines
Firms and revitalises for a youthful complexion
Improves skin elasticity and texture
Lightweight, fast-absorbing formula for all skin types
Description
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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.

  • Dipropylene Glycol Humectants
    Humectant

    A versatile humectant that helps attract and hold moisture while improving product texture and spreadability.

    May suit

    Those looking for products that support moisture balance without heaviness.

    Worth knowing

    It is also commonly used as a solvent to help dissolve other ingredients evenly in a formula. It is well tolerated in most haircare products and contributes to a smooth application feel.

  • 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.

  • 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.

  • Niacinamide Anti-dandruff / scalp care
    Scalp-supporting vitamin

    Niacinamide is a form of vitamin B3 that helps support a balanced scalp environment and improve hair resilience.

    May suit

    Those looking to support scalp comfort, strengthen hair, or maintain a healthy-looking scalp barrier.

    Worth knowing

    It is commonly used in both skincare and haircare for its soothing and barrier-supporting properties. It pairs well with many other ingredients and is generally well tolerated.

  • Acetyl Hexapeptide-8 Proteins and amino acids
    Peptide conditioning agent

    A short-chain peptide used to help condition hair and support a smoother feel.

    May suit

    Those looking for advanced conditioning or scalp-care formulations.

    Worth knowing

    Peptides are used in some haircare products to support softness and manageability. They are included at low levels to complement other conditioning agents.

  • Dipeptide Diaminobutyroyl Benzylamide Diacetate Proteins and amino acids
    Peptide active

    A small synthetic peptide used as a cosmetic active that is marketed to reduce micro‑contractions in skin and promote a smoother appearance.

    May suit

    People looking for smoothing or anti‑ageing effects in leave‑on scalp or skin treatments, and formulators seeking a neuromodulator‑like peptide active.

    Worth knowing

    This ingredient is a lab‑made peptide inspired by a naturally occurring peptide and is used at low concentrations in leave‑on products. Clinical evidence is limited and most studies target skin appearance rather than specific hair benefits.

    Good to know

    Dipeptide Diaminobutyroyl Benzylamide Diacetate (often sold under the trade name Syn‑Ake) is designed to mimic the effect of certain bioactive peptides by modulating neuromuscular signalling involved in fine muscle contractions; in cosmetics it aims to reduce the appearance of fine lines and create a smoother surface. It is typically incorporated into serums, creams and some scalp treatments as an active ingredient; sensitivity is uncommon but patch testing is standard for new actives. Efficacy depends on formulation, concentration and consistent use, and most published data relate to facial skin rather than hair or scalp.

  • Allantoin Conditioning agents
    Scalp‑soothing conditioner

    Allantoin helps soothe the scalp and condition the hair and skin.

    May suit

    Those with a sensitive or easily irritated scalp may appreciate its calming effect.

    Worth knowing

    It is widely used in personal care for its comforting feel and compatibility with many formulas. In haircare, it supports a smoother, more comfortable scalp experience.

  • 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.

  • Acetyl Glucosamine Humectants
    Hydrating humectant

    Helps attract and retain moisture to support softer, smoother-feeling hair.

    May suit

    Those seeking hydration, improved softness or enhanced manageability.

    Worth knowing

    It is a derivative of glucosamine often used in skincare and can also support moisture balance in hair products.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • Dextran Thickeners and stabilisers
    Stabiliser and texture enhancer

    A polysaccharide used to help stabilise formulas and improve product texture.

    May suit

    Those who prefer products with a smoother, more uniform feel.

    Worth knowing

    Dextran can also support the performance of other ingredients by helping maintain an even consistency. It is commonly used in both skincare and haircare for its gentle, supportive role in formulations.

  • Glycine Soja (Soybean) Oil Oils and butters
    Emollient oil

    A plant-derived oil that helps soften and condition the hair.

    May suit

    Those looking for added softness, shine, or nourishment in dry or coarse hair.

    Worth knowing

    It is commonly used as a lightweight conditioning oil in many haircare formulas. It can also support the spreadability of styling and treatment products.

  • 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.

  • Ammonium Acryloyldimethyltaurate/VP Copolymer Thickeners and stabilisers
    Texture enhancer

    A polymer that helps thicken and stabilise haircare formulas for a smooth, consistent texture.

    May suit

    Those who prefer products with a lightweight, non-greasy feel that still provide good spreadability.

    Worth knowing

    It is commonly used in modern formulations because it helps create stable gels and creams without adding heaviness. It also contributes to a more uniform application of styling or care products.

  • Polyacrylate Crosspolymer-6 Thickeners and stabilisers
    Thickener and stabiliser

    Helps thicken and stabilise haircare formulas for a smooth, consistent texture.

    May suit

    Those who prefer products with a gel-like or uniform texture.

    Worth knowing

    It is commonly used in gels, creams and styling products to improve spreadability and performance. It also helps keep formulas stable across different temperatures.

  • 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.

  • 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.

  • 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.

  • Adenosine Anti-dandruff / scalp care
    Scalp care ingredient

    Adenosine is used in hair and scalp products to help support a healthy scalp environment.

    May suit

    People looking for scalp‑care formulas or products aimed at supporting fuller‑looking hair.

    Worth knowing

    It is often included in leave‑on treatments where it can sit on the scalp for longer contact time. Research has explored its role in supporting the appearance of thicker, denser hair.

  • Polyquaternium-51 Conditioning agents
    Film-forming conditioner

    A conditioning polymer that forms a light film to help smooth and hydrate hair.

    May suit

    Those looking to improve softness, manageability and moisture retention, especially in dry or damaged hair.

    Worth knowing

    It is known for its humectant-like and conditioning properties, helping hair feel smoother without adding heaviness. Often used to enhance slip and reduce static.

  • Disodium EDTA Chelating agents
    Chelating agent

    Binds to minerals from hard water so the product works consistently and stays stable.

    May suit

    All products, especially in hard-water areas.

    Worth knowing

    Used in tiny amounts to keep formulas performing reliably.

  • 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.

  • 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.

  • Potassium Sorbate Preservatives
    Preservative

    Helps keep haircare formulas stable by preventing the growth of microbes.

    May suit

    Anyone who uses water-based products that benefit from reliable preservation.

    Worth knowing

    It is commonly used alongside other preservation systems to maintain product freshness and extend shelf life. It is generally well tolerated in rinse-off and leave-in products.

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