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Cosmedix Elite Serum 24 Rapid Renewal Complex is a potent anti-ageing serum with 24% LG-Retinex to target wrinkles, texture, and tone.
This high-performance formula features a proprietary blend of encapsulated retinol and retinal to help reduce the look of medium to deep lines - including crow’s feet - while supporting brighter, smoother skin. It’s designed to deliver rapid results without the typical irritation of traditional retinol products.
Ideal for those concerned with ageing, dullness, or uneven skin tone, Serum 24 also boosts deep hydration to keep skin plump and resilient.
Clinically proven for visible renewal and a more youthful appearance.
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Directions
How To Use Cosmedix Elite Serum 24 Rapid Renewal Complex
AM - We do not recommend this product for use in the AM as it may cause skin sensitivity to sun exposure.
PM - Shake well before use. Apply a small amount to cleansed and toned skin as tolerated every 1-3 nights, working up to nightly use. Follow with moisturizer if additional hydration is needed. Protect your results by wearing your favorite COSMEDIX sunscreen daily.
Due to the high concentration of ingredients in Serum 24, we suggest applying Serum 24 every 2-3 nights until skin develops a tolerance. Cosmedix do not recommend using Serum 24 before trying Serum 16.
A plant-derived water used to soothe the scalp and provide a mild astringent effect.
May suit
Those looking for calming or refreshing scalp care benefits.
Worth knowing
Witch hazel water is commonly included in hair and scalp formulas for its gentle toning properties. It can complement other scalp-balancing ingredients.
Carthamus Tinctorius OleosomesOils and butters
Emollient / Moisturiser
Carthamus Tinctorius Oleosomes are natural oil droplets from safflower seeds used to moisturise and condition hair.
May suit
Those seeking natural emollients for dry or damaged hair.
Worth knowing
These oleosomes help deliver nourishing fatty acids and antioxidants to the hair and scalp, supporting hydration and softness without heavy residue.
Good to know
Oleosomes are microscopic oil bodies isolated from safflower seeds, valued for their skin and hair conditioning properties, often used in formulations aimed at moisture retention and gentle care.
PhospholipidsConditioning agents
Hair-conditioning ingredient
Phospholipids help condition the hair and support moisture retention.
May suit
Those looking for softer-feeling hair or products that support moisture balance.
Worth knowing
Phospholipids are naturally occurring lipid molecules that can help improve the feel and manageability of hair. They may also assist with the spreadability and overall performance of a formula.
GlycerinHumectants
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 Acrylates CopolymerThickeners and stabilisers
Thickener and stabiliser
Helps thicken and stabilise formulations for a smooth, consistent texture.
May suit
Those who prefer products with a more structured or gel-like feel.
Worth knowing
This polymer also aids in forming a light film on the hair, which can support styling and product performance. It is widely used for its reliability in many cosmetic formats.
Sodium LactateHumectants
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.
Hydrogenated PolyisobuteneConditioning agents
Emollient conditioner
A lightweight synthetic emollient that adds softness, slip and shine to hair.
May suit
Those looking for smooth, conditioned feel without the weight of traditional oils.
Worth knowing
It is often used as a non-greasy alternative to plant oils and helps reduce frizz by smoothing the hair surface. It also supports product spreadability and a silky finish.
Polysorbate 20Thickeners and stabilisers
Solubiliser / emulsifier
Helps blend oil‑based ingredients into water‑based formulas for a smooth, even texture.
May suit
Those using products with essential oils or fragranced blends, as it helps disperse these evenly.
Worth knowing
It is widely used as a gentle solubiliser in both leave‑in and rinse‑off products. Its presence can improve product consistency and prevent ingredient separation.
Cetyl AlcoholConditioning agents
Emollient and texture enhancer
Cetyl Alcohol helps soften the hair and gives products a smooth, creamy texture.
May suit
Those looking for conditioning, slip, or richer textures in their haircare products.
Worth knowing
Despite the name, fatty alcohols like cetyl alcohol are non‑drying and are commonly used to add emollience and stability to formulations.
RetinaldehydeConditioning agents
Renewing antioxidant
A vitamin A derivative used to support scalp and hair fibre renewal.
May suit
Those interested in targeted scalp-care or antioxidant-focused treatments.
Worth knowing
Retinaldehyde is less common in haircare than in skincare but can be included for its gentle renewing and antioxidant properties. Formulators typically use it in low concentrations to maintain comfort and stability.
RetinolAnti-dandruff / scalp care
Vitamin A derivative
Retinol is a form of vitamin A used in some scalp‑care formulas to support healthy skin renewal.
May suit
People interested in targeted scalp treatments or products aimed at improving scalp texture and turnover.
Worth knowing
Retinol is more common in skincare than haircare, but small amounts may be included in specialised scalp products. It is typically formulated at low levels to help maintain comfort and balance.
ProlineProteins 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.
Sodium HyaluronateHumectants
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.
Helianthus Annuus (Sunflower) Seed OilOils and butters
Emollient oil
A plant-derived oil that helps soften and condition the hair and scalp.
May suit
Those seeking lightweight natural oils for moisture, shine or scalp comfort.
Worth knowing
It is rich in fatty acids that support hair softness without feeling overly heavy. Often used as a carrier oil in both rinse-off and leave-in formulas.
Tapioca StarchThickeners and stabilisers
Absorbent / texturiser
Tapioca Starch is a plant-derived powder used to thicken formulas and add soft, lightweight texture.
May suit
Those who prefer lightweight, non-greasy styling or absorbent ingredients, including in dry shampoos or texture sprays.
Worth knowing
It helps reduce excess oil and improves the feel of products without heaviness. It is commonly used in both haircare and skincare for its smooth, silky finish.
A fermented radish root filtrate used to help keep formulations fresh and stable.
May suit
Those interested in products that use fermentation-derived preservation systems.
Worth knowing
It provides mild antimicrobial activity and is commonly used in modern, gentle preservation blends. Its use does not change how the product performs on the hair.
A plant-derived extract used to condition and support the overall feel of hair and scalp.
May suit
Those looking for gentle, plant-based ingredients in their haircare routine.
Worth knowing
It is often included for its soothing and antioxidant properties in cosmetic formulas. As with most botanical extracts, its exact benefits can vary depending on concentration and formulation.
A plant-derived extract used to soothe and condition the hair and scalp.
May suit
People looking for gentle botanical ingredients that support a comfortable scalp.
Worth knowing
It is commonly included in formulations for its calming and antioxidant properties. Botanical extracts can complement other conditioning or soothing agents in a formula.
Lavandula Hybrida OilFragrance ingredients
Fragrance oil
Adds a fresh, herbal lavender-like scent to haircare formulas.
May suit
Those who enjoy naturally aromatic products or prefer botanical fragrance sources.
Worth knowing
As an essential oil, it can also contribute light soothing or refreshing sensorial benefits in some formulations. It naturally contains components like linalool, which may be listed separately on ingredient labels.
GalactoarabinanThickeners and stabilisers
Film-forming polymer
A plant-derived polysaccharide that helps improve product texture and forms a light film on hair.
May suit
Those looking for smoother-feeling hair or lightweight conditioning without heaviness.
Worth knowing
It is commonly sourced from larch trees and is valued for its ability to enhance spreadability and reduce moisture loss. Its lightweight film can support smoother styling.
TocopherolPreservatives
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.
SqualaneOils and butters
Lightweight emollient
Squalane is a lightweight emollient that helps smooth and soften the hair.
May suit
Those seeking added softness, shine and frizz control without a heavy or greasy feel.
Worth knowing
It is often derived from plant sources such as sugarcane and is valued for its stability and non-greasy texture. It is suitable for most hair types, including fine hair, due to its lightness.
Hydroxypropyl Starch PhosphateThickeners and stabilisers
Texture stabiliser
A modified starch used to thicken and stabilise haircare formulas.
May suit
Anyone who prefers products with a smooth, consistent texture that spread easily through the hair.
Worth knowing
It helps improve the feel and stability of creams, conditioners and styling products. It is commonly used because it works well in both rinse-off and leave-in formulas.
DimethiconeSilicones
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.
Polyglyceryl-10 StearateThickeners and stabilisers
Emulsifier
A plant‑derived emulsifier that helps blend oil‑ and water‑based ingredients for smooth, stable formulations.
May suit
Those who prefer silicone‑free or lightweight formulations that still feel smooth and conditioned.
Worth knowing
It is often used in gentle, skin‑ and scalp‑friendly formulas because it helps maintain product stability without adding heaviness. Its structure also provides a light conditioning effect in some haircare products.
GluconolactoneHumectants
Humectant
Gluconolactone helps attract and hold moisture in hair and scalp.
May suit
Those seeking gentle hydration or lightweight moisture support.
Worth knowing
It is part of the polyhydroxy acid (PHA) family and is known for being mild and suitable for many hair types. It can also support product stability and texture.
Xanthan GumThickeners 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.
Tetrasodium EDTAChelating agents
Chelating agent
Helps bind metal ions in water to improve product stability and performance.
May suit
Those in hard-water areas who want shampoos and conditioners to rinse more cleanly.
Worth knowing
Chelating agents can support formula consistency and help prevent minerals from depositing on the hair or interfering with product texture. They are widely used in many rinse-off and leave-in formulations.
Citric AcidpH 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.
AlcoholSolvents
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.
Potassium SorbatePreservatives
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.
Sodium GlycolatepH adjusters
pH adjuster
Helps maintain or adjust a product’s pH for stability and performance.
May suit
Those interested in products formulated for an optimal pH balance.
Worth knowing
It is the sodium salt of glycolic acid and is commonly used to help keep formulations stable. In haircare, appropriate pH contributes to how smooth and manageable the hair feels.
Sodium HydroxidepH adjusters
pH adjuster
Helps control and stabilise the pH of haircare formulations.
May suit
Those interested in how product pH affects scalp comfort or hair cuticle behaviour.
Worth knowing
It is used in very small amounts to bring a formula to the desired pH range. Once adjusted, it does not act as a strong alkaline agent in the finished product.
Benzoic AcidPreservatives
Preservative
Helps protect haircare products by supporting the preservation system and maintaining formula stability.
May suit
Those who want products that remain fresh and effective throughout their shelf life.
Worth knowing
Benzoic Acid is often used alongside other preservatives to create a broad-spectrum system. It also plays a minor role in helping maintain a product’s pH balance.
Sodium BenzoatePreservatives
Preservative
Helps protect water-based products from spoilage so they stay usable.
May suit
All products that need a preservative system.
Worth knowing
Often paired with other preservatives for broad protection.
LinaloolFragrance ingredients
Fragrance component
A fragrance component found naturally in many flowers and spices.
Worth knowing
A fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.
LimoneneFragrance ingredients
Fragrance component
A fragrance component that also occurs naturally in many citrus and plant oils.
Worth knowing
A fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.
CoumarinFragrance ingredients
Fragrance component
Coumarin is a fragrance ingredient that adds a sweet, warm, slightly herbal note to scented formulations.
May suit
Those who enjoy subtly sweet, complex fragrance profiles in their haircare products.
Worth knowing
It is one of the fragrance components that must be listed individually when present above certain levels, as some people may prefer to monitor specific scent materials. Its presence does not indicate the overall strength of a product's fragrance.
GeraniolFragrance ingredients
Fragrance component
Geraniol is a fragrant compound that adds a light floral note to haircare products.
May suit
Those who enjoy floral-scented hair products or are checking for specific fragrance components.
Worth knowing
It is naturally found in essential oils such as rose and geranium and is commonly used to enhance scent profiles. It must be listed on labels when present above certain trace levels.
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Questions and Answers
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