Haircare, reformulated - The scalp as the category’s scientific anchor

Haircare in 2026 is undergoing one of its most substantive structural evolutions in decades.

As one of the most underpenetrated categories in beauty, it was traditionally dominated by shampoo and conditioner formats, functioning primarily as a hygiene necessity and paying little attention to the biological environment that produces the hair itself.

The scalp, although acknowledged, was mainly associated with dandruff control rather than treated as a central site of care.

That dynamic is changing.

Haircare is now evolving toward treatment-led and scalp-centric formulation strategies that address the biological mechanisms underpinning hair performance.

Advances in dermatology, trichology, endocrinology and microbiome science are reshaping how we understand hair biology today (Trüeb, 2015; Grice & Segre, 2011).

This is visible across product innovations, professional services and consumer behaviour.

Consumers themselves have become more literate. As awareness grows that the scalp is living skin, routines are no longer built purely around cleansing and hygiene, they are building routines that respond to their scalp condition, fibre behaviour and wash environment to improve manageability and comfort over time.

For formulators and R&D teams, this shift affects how products are developed, how claims are substantiated and how ingredient systems are selected to balance efficacy with irritation management.

The numbers validate this change. The global hair and scalp care market valued USD 104bn in 2024 is forecast to exceed USD 150bn by 2030 (Euromonitor, 2024). And the growth is not evenly distributed across formats, as specialised scalp care is outpacing general haircare, with a 7.1% CAGR, driven largely by the skinification of hair.

Treatment-led categories such as scalp serums, masks and leave-on treatments are leading this expansion. Retail data reinforces the move toward treatment-led haircare. Circana reports prestige haircare sales rising 8% year-on-year, with serums, masks and leave-in scalp treatments among the fastest-growing formats across major retailers including Ulta Beauty and Sephora.

Circana reported double-digit growth in prestige hair serums during the first half of 2025, while Mintel GNPD data shows masstige treatment launches in Asia-Pacific (APAC) more than doubling over the past five years. China alone accounts for 39.5% of these launches, signalling where formulation innovation is accelerating.

Strategic moves from industry leaders reinforce this direction. L’Oréal’s acquisition of Color Wow in 2025 frames premium, treatment-led haircare as a key growth engine for the category. For formulators, this points clearly towards treatment-led development rather than standard cleansing formats we all knew.

At the same time, haircare is increasingly framed within a wider wellness narrative. Euromonitor reports that products are now marketed through rituals such as scalp massage, pre-wash treatments and leave-on serums, aligning haircare with stress management and self-care rather than simple hygiene.

Consumers increasingly connect hair health with broader lifestyle factors including stress, diet, medication, hormonal fluctuations and environmental exposure.

Search data reflects this growing awareness. Queries relating to scalp serums, hair shedding and scalp discomfort have risen sharply across search platforms and social media. Trend analysis from Spate shows scalp care content on TikTok growing more than 20% year-on-year, generating millions of weekly engagements.

Haircare is one of the few categories used consistently by both men and women, with thinning hair and hair-loss prevention emerging as shared concerns. Retail and search statistics also show rising male engagement with treatment-led haircare, particularly products positioned around scalp health, density support and long-term hair maintenance.

Rising concerns around thinning and shedding that are linked to ageing, physiological stress, post-viral telogen effluvium following COVID-19 or following rapid weight loss or metabolic stress associated with GLP-1 agonists. While the follicles themselves remain intact, disruption of the hair growth cycle frequently prompts consumers to seek preventative solutions. 

This helps explain why treatment-led growth is strongest in prestige channels like dermatology clinics, where consumers believe a product addresses an underlying concern - reinforcing the growing emphasis on scalp resilience rather than unrealistic growth-stimulation promises.

Consumers also expect ingredients to demonstrate biological plausibility, even if they do not fully understand the science behind it. Associations with barrier support, antifungal activity, exfoliation or fibre protection now resonate more strongly than traditional claims such as nourishing or strengthening.

This development is often described as the skinification of hair. In practice it refers to applying skincare logic to the scalp: barrier support, inflammation control, microbiome awareness and leave-on treatment formats. This has driven the rise of scalp serums, exfoliating pre-cleanses, microbiome-friendly formulations and gentler surfactant systems. 

Writing for in-cosmetics Connect in 2023, Belinda Carli described skinification of haircare as an extension of skincare, driven by post-pandemic behaviour and improved understanding of the scalp as biologically active skin. This is where things become interesting, what has changed since is not the science but the industry’s readiness to act on it.

Professional care has played a significant role in accelerating scalp awareness. Salons are no longer limited to cutting and colouring, many now offer scalp diagnostics and treatment services, while the Korean head spa and Thailand’s wellness-led beauty culture have popularised structured scalp rituals combining cleansing, exfoliation and massages. As consumers travel and experience these services, expectations return with them.

For formulators, this creates two distinct technical briefs: maintaining fibre aesthetics while protecting the biological environment that produces the hair.

Hair fibre itself is metabolically inactive. Its diameter, curl pattern, porosity and tensile strength vary widely due to genetics and damage history. They are also determined by follicular biology and subsequently modified by environmental exposure, mechanical stress and chemical processing.

Hair growth follows a repeating cycle consisting of three phases; anagen (active growth), catagen (transition) and telogen (resting), which ultimately ends in shedding (Paus & Cotsarelis, 1999).

Highly textured or chemically treated hair types often exhibit increased porosity and cuticle disruption, requiring conditioning systems that prioritise lubrication, cuticle alignment and moisture retention. These functions are typically delivered through cationic polymers, fatty alcohols, lipids and film-forming agents that improve fibre cohesion and reduce friction.

Low-porosity hair resists water uptake and is prone to build-up, while high-porosity hair absorbs water easily but loses it quickly, requiring more substantive conditioning and film-forming support.

This variability explains why consumers increasingly seek products developed for specific hair types rather than universal solutions. For formulators, it reinforces the need for differentiated conditioning systems, deposition control and hydration strategies.

The scalp, by contrast, is biologically active skin with its own microbiota and barrier requirements. It contains a dense network of follicles, sebaceous glands, immune-active cells and sensory nerve endings.

Sebum production is typically higher than on facial skin, while barrier integrity is regularly challenged by surfactant exposure, water quality, heat styling, occlusion and climate conditions.

The scalp microbiome also presents unique characteristics. A healthy scalp is home to billions of microorganisms, including lipophilic (oil-loving) Malassezia yeast which play a key role in both homeostasis and dysfunction. When overgrowth occurs, often due to excess sebum and increased perspiration - often in warmer climates, it triggers inflammation, leading to dandruff, itching and seborrheic dermatitis (Clavaud et al., 2013).

Presenting a unique exposure and absorption profile, the scalp’s follicular pathway offers an enhanced route for ingredient penetration, creating opportunities for targeted delivery but also elevating susceptibility to irritation, barrier disruption and microbial imbalance.

These factors require a level of formulation precision historically absent from mass haircare. Surfactant selection, fragrance load, pH alignment and cumulative irritation potential are becoming increasingly central considerations.

Hair fibre and scalp skin behave very differently biologically, yet both fall under cosmetic and personal care regulations unless medicinal claims are made.

In the UK and EU, haircare products are governed by Regulation (EC) No 1223/2009. Claims relating to dandruff or scalp discomfort must remain cosmetic and cannot imply treatment of medical conditions.

As a result, brands are increasingly adopting physiological marketing language focused on barrier support, scalp comfort and reduction of visible flaking supported by appropriate testing.

Instrumental measures such as transepidermal water loss (TEWL), hydration assessments and irritation studies are becoming more common in claim substantiation. Rather than constraining innovation, regulation is reinforcing formulation strategies centred on compatibility, repeatability and demonstrable performance.

Formulation strategies are increasingly being built around the scalp barrier itself. The scalp is treated as a biological environment rather than simply the surface beneath the hair fibre.

Structurally, the scalp follows the same architectural logic as other skin sites: corneocytes organised within a lipid matrix of ceramides, cholesterol and fatty acids that regulate TEWL and inflammatory signalling (Elias & Feingold, 2006). When this becomes compromised through repeated cleansing, environmental exposure or microbial imbalance, irritation and visible flaking often follow.

Scalp conditions rarely exist in isolation. Sebum imbalance, barrier disruption, microbial changes and inflammatory signalling frequently overlap, which has pushed formulation strategies toward systems-based design that work together rather than single-ingredient narratives.

For formulators, this has shifted ingredient strategy toward biomimetic lipid systems designed to reinforce scalp barrier function, supported by peptides and humectants that increase scalp hydration and improve hair fibre moisture balance.

At the same time, microbiome-aware approaches using pre/ postbiotics to support "good" bacteria are gaining traction as the role of lipophilic yeasts such as Malassezia in dandruff pathology becomes better understood (Clavaud et al., 2013).

Alongside barrier support, physiology-informed actives are increasingly explored to support scalp homeostasis and influence the microenvironment surrounding the follicle. While pH-aligned conditioning systems and amino acid networks help maintain fibre cohesion and tensile strength.

Emerging neurocosmetic ingredients are also being explored in scalp care, recognising that the scalp is one of the most densely innervated skin sites and that neurogenic inflammation and stress signalling can influence both follicular behaviour and perceived scalp comfort.

The result is a formulation model that treats the scalp less as a surface to cleanse and more as a biological environment to stabilise.

Format innovation reflects these scientific developments. Leave-on scalp products such as serums and lightweight emulsions allow sustained contact with the follicular environment, while rinse-off products increasingly function as preparatory steps within broader treatment routines.

Environmental variables add further complexity. Water hardness can influence surfactant performance, residue deposition and fibre feel, making it increasingly difficult for global haircare to rely on universal formulations.

As a result, formulation strategies are beginning to account for regional conditions such as climate, water composition and hair texture diversity. This level of consideration brings haircare development closer to dermatological product design than traditional cosmetic iteration. Further meeting consumer demands of solution driven haircare.

Commercially, this recalibration is expressed through routines rather than single products.

Brands increasingly structure haircare around paired solutions: a scalp-focused product designed to optimise the biological environment combined with fibre-specific conditioning systems addressing porosity, texture and mechanical resilience.

Haircare is therefore evaluated less by immediate sensorial payoff and more by long-term scalp tolerance and consistency of fibre behaviour.

For those developing the next generation of haircare, formulation is no longer simply a technical function. It is where credibility is established and where the future of the category will be decided. This is not a trend. It’s a structural evolution of how beauty now interprets hair as a system, not a surface.

Haircare’s evolution reflects a durable move toward maintenance, prevention and long-term performance.

Scalp biology now sits at the centre of formulation strategy, while manageability has emerged as a key signal of success - hair that behaves predictably, styles consistently and retains performance between frequent washes.

For formulators, the opportunity lies in designing systems that respect scalp physiology, protect fibre integrity and deliver routines that feel comfortable to use over time. Format, climate and routine design are now core to innovation, not an afterthought.

As consumer literacy increases and regulatory scrutiny intensifies, the scalp is no longer a secondary consideration. It is becoming the category’s scientific anchor and increasingly the starting point for how the next generation of haircare will be formulated.

• Trüeb, R.M. (2015). The impact of oxidative stress on hair ageing and hair loss
• Grice, E.A. & Segre, J.A. (2011). The skin microbiome. Nature Reviews Microbiology
• Asghar, F. et al. (2020). Telogen effluvium: a review of the literature
• Clavaud, C. et al. (2013). Dandruff is associated with imbalance of the scalp microbiome
• Elias, P.M. & Feingold, K.R. (2006). Skin barrier function
• Turner, G.A. et al. (2012). Stratum corneum dysfunction in dandruff
• Paus R & Cotsarelis G. (1999). The biology of hair follicles. New England Journal of Medicine
• Circana (2025) Prestige haircare performance in Europe and the United States, H1–Q3 2025.
• Euromonitor International (2024) Salon professional haircare: growth, premiumisation and the role of e-commerce
• Grand View Research (2024) Hair and scalp care market size, share and trends analysis report, 2024–2030
• Mintel GNPD (2024) Hair treatment product launch analysis in APAC
• Reuters (2024) L’Oréal Group moves to acquire Color Wow, signalling premium haircare growth
• Seppic (2025) Scalp care engagement and ingredient trend insights
• Spate (2024–2025) Hair and scalp care search interest and social media engagement data.
• in-cosmetics Connect (2023) Carli, B. The skinification of haircare
• www.theskinshrink.com

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