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ROH Scalp Renew Serum boosts cellular renewal and hair density, stimulating and soothing the scalp to encourage healthy hair production.
This potent elixir is concentrated with functional peptides, amino acids, and growth actives. Featuring Cucumber Extract, Arginine, and Niacinamide, it calms scalp irritation and sensitivity while transporting nutrients to support the hair’s natural growth cycle. Ideal for all scalp and hair types, especially those with irritated or sensitive scalps, this serum ensures optimal scalp and hair health.
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Directions
How To Use ROH Scalp Renew Serum
A quick-drying formula. Use daily on damp or dry hair. Apply directly on the scalp, focusing on the hairline & partlines. Do not rinse. Leave in, allowing to dry naturally or style as desired.
Occasionally, product packaging and ingredients are updated without notice. For the most accurate information please check the product packaging. If you do happen to find an error, please let us know so we can update it immediately.
Water (Aqua)Solvents
Solvent
Water acts as the main solvent that dissolves and distributes other ingredients in a formula.
May suit
Anyone using liquid haircare products, as water is a core component.
Worth knowing
It helps create a workable texture and allows surfactants, conditioners and other actives to perform effectively.
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.
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.
Heptyl UndecylenateConditioning agents
Lightweight emollient
A plant-derived emollient that adds slip and softness without weight.
May suit
Those wanting a smooth, conditioned feel without heavy silicones.
Worth knowing
It is often used as a biodegradable alternative to some traditional emollients and helps improve spreadability in formulations. It can contribute to a lighter, silkier texture in hair products.
Methyl Gluceth-20Humectants
Humectant
A moisturising ingredient that helps attract and hold water in the hair and scalp.
May suit
Those seeking added hydration without heaviness, including dry or coarse hair types.
Worth knowing
It is derived from glucose and is commonly used for its gentle, non-sticky hydration profile. It can also help improve the feel and spreadability of formulations.
Propylene GlycolHumectants
Humectant
Helps hold moisture and carry other ingredients through the formula.
May suit
Most hair types as part of a moisturising formula.
Worth knowing
A widely used humectant and carrier ingredient.
Cocos Nucifera (Coconut) WaterBotanical extracts
Hydrating botanical water
Coconut water helps hydrate and refresh the hair and scalp.
May suit
Those looking for lightweight hydration or gentle botanical ingredients.
Worth knowing
It is valued for its mineral and electrolyte content, which can support moisture balance in formulations. Often used in place of plain water to add a subtle conditioning boost.
Lactococcus Ferment LysateAnti-dandruff / scalp care
Scalp-balancing ferment
A fermented lysate used to help support a balanced scalp environment and overall hair vitality.
May suit
People interested in soothing or supporting the scalp microbiome.
Worth knowing
Fermented ingredients like this can help condition the scalp and support its natural barrier. They are commonly used in modern scalp-care formulas.
NiacinamideAnti-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.
BiotinAnti-dandruff / scalp care
Scalp-supporting vitamin
Biotin is a B‑vitamin used in haircare to support the condition of the scalp and hair fibre.
May suit
Those looking for formulas that help maintain a healthy-feeling scalp or the appearance of stronger hair.
Worth knowing
In topical products it is used in small amounts to complement other strengthening or scalp-care ingredients. Its effects are supportive rather than dramatic on its own.
ArginineProteins 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.
Acetyl TyrosineProteins and amino acids
Amino acid derivative
An amino acid derivative used to support hair strength and overall conditioning.
May suit
Those looking for formulas that help reinforce hair structure or support hair vitality.
Worth knowing
It is often included alongside other amino acids or peptides to enhance hair-conditioning blends. Its role is typically supportive rather than a main active on its own.
Panax Ginseng Root ExtractBotanical extracts
Botanical extract
A plant extract used to help condition the scalp and support the feel of stronger, revitalised hair.
May suit
People looking for botanical ingredients that support scalp care or the appearance of hair vitality.
Worth knowing
Ginseng extracts are commonly included in haircare for their traditional association with invigorating and conditioning properties. They can be blended with other botanical or conditioning ingredients for complementary effects.
Arctium Majus Root ExtractBotanical extracts
Botanical extract
A plant extract used to soothe and condition the scalp and hair.
May suit
People looking for gentle botanical ingredients that support scalp comfort and overall hair condition.
Worth knowing
It is commonly included in formulations aimed at maintaining a balanced scalp environment. As with most botanical extracts, benefits can vary depending on concentration and formulation.
Caulerpa Lentillifera ExtractBotanical extracts
Botanical conditioning extract
A marine botanical extract that can help hydrate and support the feel of healthier hair and scalp.
May suit
Those looking for products featuring marine or botanical ingredients for added hydration or scalp comfort.
Worth knowing
This extract is derived from green algae often referred to as sea grapes and is used for its moisturising and conditioning properties. Its benefits vary depending on the overall product formulation.
Hydrolyzed Soy ProteinProteins and amino acids
Strengthening protein
A plant-derived protein that helps support hair strength and improve the feel of damaged or processed hair.
May suit
People with weakened, chemically treated, or breakage-prone hair may appreciate its reinforcing effect.
Worth knowing
Hydrolysed proteins are broken into smaller fragments so they can more easily interact with the hair’s surface. They are commonly used alongside conditioners and humectants for a balanced feel.
Calcium PantothenateConditioning agents
Hair conditioning vitamin
A stable form of vitamin B5 that helps condition and support the feel of the hair and scalp.
May suit
People looking for formulas that support softness and general hair manageability.
Worth knowing
It is related to panthenol (provitamin B5) and is used for its conditioning and supportive properties in hair and scalp products.
Zinc GluconateAnti-dandruff / scalp care
Scalp-support ingredient
Zinc Gluconate is used to help support a balanced scalp environment and regulate excess oil.
May suit
People with oily scalps or those seeking gentle scalp‑care benefits.
Worth knowing
It is a zinc salt often included for its soothing and balancing properties in hair and scalp formulations. It can complement other scalp‑care ingredients in targeted treatments.
Ornithine HClProteins and amino acids
Amino acid derivative
An amino acid derivative used to help support hair feel, strength and overall conditioning.
May suit
Those looking for formulas that include amino acids to support smoother, more manageable hair.
Worth knowing
Amino acids are often added to haircare to complement conditioning systems and support the hair fibre’s feel. Ornithine is one of several amino acids that may be included for this purpose.
CitrullineProteins and amino acids
Amino acid moisturiser
An amino acid that helps support moisture balance and overall hair feel.
May suit
Those looking for lightweight hydration or formulas enriched with amino acids.
Worth knowing
Amino acids like citrulline are often included to complement conditioning systems and enhance softness without weight.
Glucosamine HClHumectants
Humectant
Helps attract and hold moisture to support hydrated hair and scalp.
May suit
People looking to maintain moisture balance or support smoother-feeling hair.
Worth knowing
As an amino sugar, it is sometimes included to enhance moisture retention or support the feel of conditioning formulas. Its presence is typically complementary rather than a primary active.
Cucumis Sativus (Cucumber) Fruit ExtractBotanical extracts
Soothing botanical extract
A plant extract used to soothe and lightly hydrate the hair and scalp.
May suit
Those looking for gentle, plant-derived ingredients that offer a refreshing feel.
Worth knowing
Cucumber extract is commonly included in formulations for its mild, calming properties and fresh sensory profile.
PanthenolConditioning agents
Conditioning agent
Helps condition, soften and add a smooth, healthy feel to the hair.
May suit
Most hair types, especially dry or dull hair.
Worth knowing
A versatile, well-tolerated conditioning ingredient.
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.
PEG-12 DimethiconeSilicones
Silicone-based conditioning agent
A water-dispersible silicone that helps soften hair, add slip and reduce frizz.
May suit
People looking for smoother, easier-to-detangle hair without a heavy silicone feel.
Worth knowing
Because it is water-dispersible, it tends to rinse out more easily than many traditional silicones. It is commonly used in both rinse-off and leave-in formulas for added manageability.
Polyquaternium-11Conditioning agents
Film-forming conditioner
A film-forming polymer that helps smooth, condition and lightly hold the hair.
May suit
People looking for improved manageability, frizz control or soft styling hold.
Worth knowing
It is commonly used in both shampoos and styling products because it enhances slip and helps hair feel smoother. It can also support curl definition and reduce static.
PolyacrylamideThickeners and stabilisers
Thickener and stabiliser
Polyacrylamide helps thicken and stabilise haircare formulas while providing a smooth, conditioned feel.
May suit
Those who prefer products with a silky glide or formulas that add light hold or structure.
Worth knowing
It is a commonly used synthetic polymer that supports product texture and performance. It does not typically affect hair type compatibility on its own.
C13-14 IsoparaffinSolvents
Lightweight emollient and solvent
Helps dissolve other ingredients and gives products a smooth, light texture.
May suit
Those who prefer lightweight, non-greasy formulas that spread easily.
Worth knowing
It is commonly used to improve slip and reduce greasiness in creams, serums and hair products. It can also support the even distribution of styling or conditioning ingredients.
Laureth-7Cleansers / surfactants
Non-ionic surfactant
A non-ionic surfactant that helps cleanse and improve the spreadability of haircare formulas.
May suit
Those wanting gentle cleansing or smoother-feeling product textures.
Worth knowing
It is often used to solubilise oils and support mild cleansing without a foaming feel. Its non-ionic nature makes it compatible with many other ingredients.
Polyquaternium-7Conditioning agents
Conditioning polymer
A conditioning polymer that helps smooth, soften and reduce static in the hair.
May suit
People looking for improved slip, reduced frizz or easier detangling.
Worth knowing
It is commonly used in shampoos, conditioners and styling products to enhance manageability and provide a light, non‑heavy feel. It is well known for offering conditioning benefits without weighing the hair down.
ParfumFragrance ingredients
Fragrance
Gives the product its scent.
May suit
People who enjoy a scented product.
Worth knowing
Fragrance preference is personal. Some people prefer fragrance-free formulas by choice.
PhenoxyethanolPreservatives
Preservative
Helps keep the product stable and pleasant to use after opening.
May suit
All products that need protecting from spoilage.
Worth knowing
A very common, well-studied preservative used at low levels.
ChlorphenesinPreservatives
Preservative
Chlorphenesin helps keep haircare products fresh by supporting protection against microbial growth.
May suit
Those looking for products with reliable preservation, especially in creams, lotions or styling formulas.
Worth knowing
It is commonly used in cosmetics at low levels to help maintain product quality over time. It works alongside other preservatives to support formula stability.
HydroxycitronellalFragrance ingredients
Fragrance component
Hydroxycitronellal is a fragrance ingredient used to give haircare products a fresh, floral scent.
May suit
Those who enjoy scented hair products or want a light floral note in their routine.
Worth knowing
It is one of the fragrance allergens that must be listed on labels when present above certain thresholds. People who are monitoring fragrance components for sensitivity may find this information useful.