The 6 Peptide Skin Booster Serum 150ml
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Delivery
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COSRX The 6 Peptide Skin Booster Serum revitalises and firms the skin with a potent blend of six peptides, promoting a youthful and radiant complexion. This lightweight serum is designed to target signs of ageing, such as fine lines and wrinkles, while improving skin elasticity and texture.
Suitable for all skin types, COSRX The 6 Peptide Skin Booster Serum combines six powerful peptides to enhance collagen production and support skin's natural repair processes. The formula hydrates deeply, leaving the skin feeling smooth, plump, and rejuvenated. Fast-absorbing and non-greasy, it provides an instant boost of radiance and long-term anti-ageing benefits.
How To Use COSRX The 6 Peptide Skin Booster Serum
After cleansing your skin, apply an adequate amount of product, gently patting for better absorption.
COSRX The 6 Peptide Skin Booster Serum Ingredients
Water, Dipropylene Glycol, Glycerin, Pentylene Glycol, 1,2-Hexanediol, Niacinamide, Acetyl Hexapeptide-8, Copper Tripeptide-1, sh-Polypeptide-121, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Oligopeptide-68, Palmitoyl Tripeptide-8, Allantoin, Sodium Hyaluronate, Acetyl Glucosamine, Serine, Alanine, Glycine, Threonine, Arginine, Proline, Betaine, Sodium PCA, Sodium Lactate, PCA, Glutamic Acid, Lysine HCl, Tocopherol, Dextran, Glycine Soja (Soybean) Oil, Hydrogenated Lecithin, Ammonium Acryloyldimethyltaurate/VP Copolymer, Polyacrylate Crosspolymer-6, Butylene Glycol, Xanthan Gum, Ethylhexylglycerin, Adenosine, Polyquaternium-51, Disodium EDTA, Citric Acid, Caprylyl Glycol, t-Butyl Alcohol, Potassium Sorbate, Sodium Oleate.
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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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Dipropylene Glycol HumectantsHumectant
A versatile humectant that helps attract and hold moisture while improving product texture and spreadability.
May suitThose looking for products that support moisture balance without heaviness.
Worth knowingIt 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.
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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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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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Niacinamide Anti-dandruff / scalp careScalp-supporting vitamin
Niacinamide is a form of vitamin B3 that helps support a balanced scalp environment and improve hair resilience.
May suitThose looking to support scalp comfort, strengthen hair, or maintain a healthy-looking scalp barrier.
Worth knowingIt 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.
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Acetyl Hexapeptide-8 Proteins and amino acidsPeptide conditioning agent
A short-chain peptide used to help condition hair and support a smoother feel.
May suitThose looking for advanced conditioning or scalp-care formulations.
Worth knowingPeptides are used in some haircare products to support softness and manageability. They are included at low levels to complement other conditioning agents.
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Dipeptide Diaminobutyroyl Benzylamide Diacetate Proteins and amino acidsPeptide 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 suitPeople looking for smoothing or anti‑ageing effects in leave‑on scalp or skin treatments, and formulators seeking a neuromodulator‑like peptide active.
Worth knowingThis 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 knowDipeptide 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.
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Allantoin Conditioning agentsScalp‑soothing conditioner
Allantoin helps soothe the scalp and condition the hair and skin.
May suitThose with a sensitive or easily irritated scalp may appreciate its calming effect.
Worth knowingIt 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.
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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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Acetyl Glucosamine HumectantsHydrating humectant
Helps attract and retain moisture to support softer, smoother-feeling hair.
May suitThose seeking hydration, improved softness or enhanced manageability.
Worth knowingIt is a derivative of glucosamine often used in skincare and can also support moisture balance in hair products.
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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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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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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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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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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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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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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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Dextran Thickeners and stabilisersStabiliser and texture enhancer
A polysaccharide used to help stabilise formulas and improve product texture.
May suitThose who prefer products with a smoother, more uniform feel.
Worth knowingDextran 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.
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Glycine Soja (Soybean) Oil Oils and buttersEmollient oil
A plant-derived oil that helps soften and condition the hair.
May suitThose looking for added softness, shine, or nourishment in dry or coarse hair.
Worth knowingIt is commonly used as a lightweight conditioning oil in many haircare formulas. It can also support the spreadability of styling and treatment products.
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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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Ammonium Acryloyldimethyltaurate/VP Copolymer Thickeners and stabilisersTexture enhancer
A polymer that helps thicken and stabilise haircare formulas for a smooth, consistent texture.
May suitThose who prefer products with a lightweight, non-greasy feel that still provide good spreadability.
Worth knowingIt 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.
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Polyacrylate Crosspolymer-6 Thickeners and stabilisersThickener and stabiliser
Helps thicken and stabilise haircare formulas for a smooth, consistent texture.
May suitThose who prefer products with a gel-like or uniform texture.
Worth knowingIt is commonly used in gels, creams and styling products to improve spreadability and performance. It also helps keep formulas stable across different temperatures.
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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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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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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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Adenosine Anti-dandruff / scalp careScalp care ingredient
Adenosine is used in hair and scalp products to help support a healthy scalp environment.
May suitPeople looking for scalp‑care formulas or products aimed at supporting fuller‑looking hair.
Worth knowingIt 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.
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Polyquaternium-51 Conditioning agentsFilm-forming conditioner
A conditioning polymer that forms a light film to help smooth and hydrate hair.
May suitThose looking to improve softness, manageability and moisture retention, especially in dry or damaged hair.
Worth knowingIt is known for its humectant-like and conditioning properties, helping hair feel smoother without adding heaviness. Often used to enhance slip and reduce static.
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Disodium EDTA Chelating agentsChelating agent
Binds to minerals from hard water so the product works consistently and stays stable.
May suitAll products, especially in hard-water areas.
Worth knowingUsed in tiny amounts to keep formulas performing reliably.
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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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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.
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Potassium Sorbate PreservativesPreservative
Helps keep haircare formulas stable by preventing the growth of microbes.
May suitAnyone who uses water-based products that benefit from reliable preservation.
Worth knowingIt 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.