What does the microbiome mean in personal care formulations? In the personal care industry, skin microbiome research primarily focuses on identifying and characterizing the microorganisms present on the skin and understanding their impact on overall skin health. Microbiome-friendly ingredients and solutions aim to nurture and maintain the natural balance of beneficial microorganisms on the skin and scalp, supporting resilience and long-term health. As a result, research and development are increasingly focused on solutions that target the skin microbiome, addressing key concerns such as longevity, inflammatory responses, barrier protection, and cell renewal.

The microbiome has become a consumer-facing concept. Growing interest in gut health has progressively extended to skin care, and more recently to scalp care, driven by the “skinification” of hair trend (2). This evolution reflects a broader shift toward holistic beauty and longevity-driven approaches to skin health.

At the same time, the personal care industry has generated significant momentum around the microbiome concept, with a growing number of ingredients positioned as microbiome-friendly. This reinforces the microbiome as a key pillar of product innovation. More importantly, this shift highlights a broader change in formulation strategy, where actives, mildness, and delivery systems must work together to deliver consistent performance.

An increasing number of ingredients and formulations positioned as “microbiome-friendly” are emerging across the personal care industry (2). These claims typically reflect products formulated with fewer aggressive compounds, such as hydroxy acids (AHA, BHA), and a greater emphasis on mild, skin-compatible actives.

As the industry shifts toward more science-backed positioning, consumers are increasingly attentive to product composition and claims (2). This growing scrutiny is driving the need for standardized testing frameworks to substantiate microbiome-related benefits. In this context, certifications, such as microbiome-friendly labels, are gaining traction, supporting more credible and transparent product positioning.

Standards such as MyMicrobiome (Standard 18.10-12 for face and body, and Standard 19.20 for scalp) are based on three key evaluation criteria:

• Balance test, assessing the effect of the product on good and harmful microorganisms
• Diversity test, ensuring the preservation of microbial biodiversity
• Vitality test, confirming no direct or indirect impact on key skin or scalp microorganisms

Together, these frameworks are helping the industry transition from marketing-led claims to evidence-based microbiome care. This shift reflects a broader industry move toward performance validation, where formulation design, delivery technologies, and testing frameworks determine credibility.

The microbiome trend in the personal care industry is driving the adoption of a wide range of active ingredients, with biotechnology-derived compounds at the core of innovation (1). These ingredients are valued for their ability to support and restore the skin’s natural flora, enhance barrier function, and deliver targeted, high-efficacy benefits. In addition, they align with consumer demand for personalized, clean, and sustainable beauty solutions.

At the center of this trend are prebiotics and postbiotics, which represent some of the fastest-growing ingredient categories for microbiome care (1). They help maintain microbiome balance, strengthen barrier protection, and soothe irritation. Prebiotics create a favorable environment for beneficial microorganisms, while postbiotics mimic the functions of a balanced microbiome. These benefits are particularly relevant for sensitive skin, barrier repair, and scalp care applications.

Beyond biotics, ceramides and hyaluronic acid are widely used in microbiome-friendly formulations (1). Ceramides are recognized for their role in restoring and strengthening the skin barrier, a key factor in maintaining a healthy microbiome. Hyaluronic acid and its derivatives contribute to hydration and barrier integrity, with ongoing innovation, such as ultra-low molecular weight variants, enhancing their efficacy.

Microalgae extracts are also gaining traction for their multifunctional properties, including anti-inflammatory, antioxidant, and hydrating benefits (1). Their compatibility with barrier-supportive and low-irritation formulations makes them well aligned with microbiome-focused care.

In parallel, fermented actives, including plant-derived extracts, are increasingly used for enhanced bioavailability and reduced irritation potential (1). Their multifunctional performance, combined with strong clean beauty positioning, reinforces their growing adoption in microbiome-friendly solutions.

Emerging biotechnology ingredients are gaining visibility in this space. Ectoin, for example, is recognized for its protective properties against environmental stressors and its role in microbiome balance and barrier function (1). Similarly, PDRN is gaining attention for its ability to promote skin regeneration, improve skin density, and reduce inflammation, helping to create optimal conditions for a balanced and resilient microbiome.

However, the effectiveness of these actives depends on formulation approaches that preserve skin balance and minimize disruption, linking ingredient selection directly to broader formulation design.

The microbiome trend has accelerated the development and adoption of mild, gentle, and multifunctional ingredients in personal care (2). These ingredients help reinforce the skin’s natural defenses while minimizing irritation, meeting growing consumer expectations for safe and effective daily care.

The rise of microbiome-focused care is driving a reduction in the use of aggressive ingredients. This shift limits the use of harsher actives, such as certain exfoliating acids, that may disrupt the skin barrier or increase the risk of irritation. As a result, opportunities are growing not only for innovative actives but also for functional ingredients, including mild surfactants. For example, the increasing demand for gentler cleansing solutions is supporting the adoption of alkyl polyglucosides and other mild surfactant systems (2).

At the same time, skin and scalp concerns are increasing globally. Environmental stressors, including climate change, extreme temperature fluctuations, pollution, and lifestyle-related stress, are contributing to heightened sensitivity among consumers. Demand for solutions targeting sensitive or condition-prone skin, such as acne or rosacea, continues to grow. This creates opportunities for ingredients that impart soothing, anti-inflammatory, and barrier-repair benefits, while supporting long-term skin resilience and reducing the risk of adverse reactions. In parallel, increasing regulatory scrutiny and formulation complexity are reinforcing the need for solutions that deliver performance within tighter constraints.

As scientific understanding of skin and scalp biology continues to evolve, insights into how the microbiome is affected by both external and internal factors will continue to deepen. This will further support the development of mild, microbiome-compatible formulations in personal care.

In parallel, there is a clear convergence between microbiome and clean beauty. Increasing demand for

transparency, safety, and sustainability is closely aligned with microbiome-friendly approaches, reinforcing a broader industry shift toward more holistic and gentle care solutions. Mildness is no longer a trade-off; it is becoming a core performance requirement. In this context, mildness alone is not sufficient. Formulations must also ensure that microbiome-supportive actives remain stable and effective, increasing the importance of delivery systems that preserve both efficacy and skin compatibility.

The growing focus on skin microbiome health is driving the adoption of advanced delivery technologies, particularly those developed through biotechnology, to enhance the performance of microbiome supportive actives (3).

Advanced delivery systems, such as encapsulated hyaluronic acid, stem cell-derived actives, or vitamins, are increasingly used to enable tailored release profiles based on skin condition (3). This approach optimizes the efficacy of microbiome-friendly ingredients by delivering actives precisely where and when they are needed, while minimizing irritation and preserving microbial balance.

These technologies also facilitate the incorporation of more sensitive or unstable actives, creating opportunities for more sophisticated and high-performance formulations. This is particularly relevant in a fast-evolving actives market, where demand for multifunctional and effective solutions continues to grow. For instance, prebiotics and postbiotics benefit significantly from encapsulation technologies, which enhance their stability and allow for controlled release.

The global delivery systems market for personal care, estimated at USD 1 billion in 2026, is expected to record strong growth of 6% to 7% CAGR over the next five years (3). The microbiome trend is accelerating the integration of smart, mild, and targeted delivery systems in personal care, enabling brands to meet consumer demand for safe, effective, and microbiome-compatible solutions.

The microbiome trend is not only expanding the actives landscape, but also reshaping how formulations are designed and evaluated. It reinforces the need for:

• integration between actives, mildness, and delivery systems
• formulation approaches that balance efficacy and stability
• greater emphasis on proof, supported by testing and validation frameworks

As a result, value is increasingly created at the formulation level, where performance depends on how effectively these elements work together rather than on individual ingredients alone.

The microbiome is no longer a niche concept but a defining framework in personal care formulation. From ingredient innovation to formulation strategies and delivery technologies, the shift toward microbiome-friendly solutions is reshaping how products are developed and positioned.

As consumer expectations evolve toward efficacy, safety, and holistic health, the integration of biotechnology actives, mildness, and advanced delivery systems will continue to play a crucial role. Looking ahead, the microbiome is set to remain a key driver of innovation, supporting the transition toward more personalized and sustainable approaches to skin and scalp care. More importantly, it is accelerating a shift toward formulation strategies where actives, mildness, and delivery are designed together to ensure consistent and scalable performance.