Hydration has consistently ranked as the top cosmetic claim globally. In 2025, it retains this position — but the scientific and consumer landscape around it has evolved considerably. From new hydration actives to claim hybridization and the growing influence of microbiome science, the field of moisturization testing is more dynamic than ever.
This article synthesizes the most significant trends in skin hydration research and market development heading into 2026, based on scientific publications, congress data, and platform intelligence from Skinobs.
1. Hydration Remains the #1 Cosmetic Claim — but It’s Evolving
According to Skinobs platform data, hydration is consistently the most searched claim among cosmetic brands using the platform in 2025, ahead of skin barrier, well-ageing, and anti-pollution. This is confirmed by global market research: the global skin moisturizer market is projected to exceed USD 22 billion by 2028.
However, a claim like ‘moisturizes’ is no longer sufficient on its own. Brands are increasingly expected to specify:
- The target skin layer (surface SC vs. deep dermis)
- The duration of effect (immediate vs. 24h vs. sustained)
- The target population (normal, dry, sensitive, mature, or specific conditions)
- The mechanism of action (humectant, occlusives, barrier-repairing)
2. The Rise of ‘Functional Hydration’: Barrier + Moisture
One of the most significant trends of 2024–2025 is the hybridization of hydration and barrier claims. Products are increasingly formulated and tested to simultaneously deliver SC hydration (corneometry) and barrier reinforcement (TEWL reduction). This reflects both scientific progress and consumer sophistication.
The ‘skin barrier’ claim has seen explosive growth, increasing by over 200% in product launches between 2020 and 2025 (Mintel data). Combined hydration + barrier protocols are now standard in forward-thinking CROs.
| Trend | Market signal | Testing implication |
| Barrier-linked hydration | Ceramide + HA combinations dominate new launches | Combined corneometry + TEWL protocols |
| Microbiome-friendly moisture | Prebiotic/postbiotic ingredients in hydration formulas | pH measurement + tolerance testing |
| Well-ageing moisturization | +121% growth in well-ageing claims on Skinobs platform | NIR or Raman for dermal hydration; collagen support biomarkers |
| Instant + long-lasting combo | ‘Immediate and 24h hydration’ dual claims | T+1h AND T+24h measurement mandatory |
| Sensitive skin hydration | Fragrance-free, minimalist formulas with clinical data | Combined tolerance + efficacy protocols |
| Personalized hydration | AI-driven skin diagnostics influencing formulation | Segmented panel studies; digital biomarkers |
3. Ingredient Innovation: Beyond Hyaluronic Acid
The evolution of HA
Hyaluronic acid remains the dominant hydration active, but formulators are moving beyond standard high-molecular-weight HA. Key innovations include:
- Cross-linked HA: longer skin residence time, improved film-forming properties
- Low-molecular-weight HA fragments (oligoHA): deeper penetration into the SC, potentially reaching viable epidermis
- Fermented HA: improved bioavailability, microbiome-compatible positioning
- Vegan HA (bio-fermentation): cleaner label, growing in Europe and South Korea
Emerging actives gaining clinical traction
- Polyglutamic acid (PGA): 4–5x stronger water-binding than HA, increasing presence in East Asian formulas
- Beta-glucan: dual hydration + immunomodulatory properties, strong appeal for sensitive skin
- Lactobionic acid: PHA with humectant + mild exfoliation — bridging hydration and radiance
- Squalane (plant-derived): lightweight occlusives with strong clean beauty positioning
- Postbiotic actives (lysates, fermentation derivatives): barrier support + hydration, high growth trajectory
4. The South Korea Factor
South Korea is one of Skinobs’ fastest-growing user markets — and a global bellwether for skincare innovation. Korean R&D teams are pioneering several hydration-related testing advances:
- Skin moisture mapping via connected devices (MoistureScan, ANTERA 3D): spatial distribution of hydration across the face
- At-home device integration in clinical studies: wearable corneometers and smart mirrors generating real-world data
- Hydration claims linked to skin microbiome balance: combination of 16S sequencing + TEWL measurement in the same study
These approaches are not yet mainstream globally, but they are shaping the next generation of hydration claim substantiation.
5. Regulatory Horizon: What’s Changing in Claim Substantiation
Several regulatory and guidance developments are relevant for hydration claims in 2025–2026:
- EU: ongoing revision of the technical document accompanying Regulation 655/2013; stronger emphasis on consumer protection and anti-greenwashing
- South Korea (MFDS): updated guidelines on functional cosmetic efficacy testing; increasing alignment with ISO standards
- Global trend: move toward real-world evidence (RWE) complementing controlled clinical studies; consumer diaries, wearable data, app-based tracking
Conclusion
Skin hydration is not a static claim — it is a dynamic, evolving scientific territory. The brands that will win in 2025–2026 are those that move beyond generic ’24h moisturization’ statements toward precise, mechanistic, population-specific, and multi-endpoint claims supported by robust clinical data.
Skinobs is the world’s leading platform for cosmetic testing referencing. Stay up to date with the latest hydration protocols, CRO capabilities, and ingredient-testing innovations on www.skinobs.com.
