Daily Cosmetic Research Analysis
Three studies highlight cosmetic-related science from bench to ecosystem: a mouthwash with 1% cinnamaldehyde matched chlorhexidine’s anti-biofilm activity in a peri-implant mucositis model, while two large marine surveys map cosmetic-derived contaminants (benzotriazole UV absorbers and synthetic musks) across East China Sea coastal waters. Together, they underscore antimicrobial alternatives and environmental exposure hotspots that warrant toxicological and clinical translation.
Summary
Three studies highlight cosmetic-related science from bench to ecosystem: a mouthwash with 1% cinnamaldehyde matched chlorhexidine’s anti-biofilm activity in a peri-implant mucositis model, while two large marine surveys map cosmetic-derived contaminants (benzotriazole UV absorbers and synthetic musks) across East China Sea coastal waters. Together, they underscore antimicrobial alternatives and environmental exposure hotspots that warrant toxicological and clinical translation.
Research Themes
- Cosmetic-derived environmental contaminants
- Antimicrobial alternatives to chlorhexidine
- Marine exposure mapping and ecological risk
Selected Articles
1. Distribution of benzotriazole ultraviolet absorbers in the nearshore marine environments of the East China Sea.
Eight benzotriazole UV absorbers were widely detected in East China Sea nearshore seawater (4.96–620 ng/L) and sediments (7.41–131 ng/g dw). Partitioning largely followed log Kow, with UV-P anomalously favoring sediments, and gradients from coast to offshore implicating terrestrial inputs; initial risk assessment indicates potential ecological concern.
Impact: Provides the first comprehensive spatial map of BUAs across seawater and sediments in the East China Sea nearshore and links distributions to compound properties and coastal inputs, informing risk assessment and regulation.
Clinical Implications: No immediate change in clinical practice, but clinicians counseling on sunscreen and cosmetic use can be aware of environmental persistence and advocate for safer formulations and stewardship, especially for coastal populations reliant on seafood.
Key Findings
- Eight BUAs detected in seawater (4.96–620 ng/L) and sediments (7.41–131 ng/g dw).
- Sediment–water distribution followed log Kow; UV-P showed unusual sediment preference due to lower steric hindrance.
- Concentrations decreased from nearshore to offshore, indicating terrestrial/coastal anthropogenic sources.
- Initial ecological risk assessment suggests potential ecological risks in local marine environments.
Methodological Strengths
- Dual-matrix sampling (seawater and sediments) with compound-specific partition analysis.
- Integration of physicochemical drivers (log Kow) and spatial gradients with initial ecological risk assessment.
Limitations
- Cross-sectional design limits temporal trend inference.
- Toxicological endpoints and biota accumulation were not directly assessed.
Future Directions: Longitudinal monitoring with seasonal coverage, biota/bioaccumulation assessments, targeted toxicology for high-risk BUAs (e.g., UV-P), and source attribution to inform regulatory controls.
Benzotriazole ultraviolet absorbers (BUAs) are regarded as emerging contaminants due to their persistent, bioaccumulative, and toxic (PBT) or very persistent and very bioaccumulative (vPvB) properties, raising concerns about their presence in aquatic environments. This study explored BUAs in the northwest nearshore of the East China Sea, revealing their prevalent occurrence in both seawater and sediments. The total concentrations of eight BUAs ranged from 4.96 to 620 ng/L in seawater and from 7.41 to 131 ng/g dry weight in sediments. Their distribution between sediments and seawater was basically dependent on log Kow, though UV-P presented an unusual preference for sediment due to its lower steric hindrance. Environmental factors had limited effects on BUAs distribution, and their decreasing concentrations from nearshore to offshore indicate terrestrial inputs and coastal anthropogenic activities are the primary sources of marine BUAs. Results of the initial ecological risk assessment suggested the occurrence of BUAs may pose potential ecological risks to the local marine environments. This study provides an overview of BUAs spatial distribution in the northwest nearshore of the East China Sea, emphasizing the urgent need for toxicological studies to fully understand their potential risks and establish regulatory measures for mitigating coastal pollution.
2. First large-scale investigation of synthetic musks in coastal waters of the East China Sea.
Across 76 coastal and estuarine sites off eastern China, ten synthetic musks were monitored with summed concentrations from below reporting limits up to 31 ng/L. Spatial heterogeneity correlated with water quality parameters and population density, mapping coastal exposure to cosmetic-derived fragrances.
Impact: This is the first large-scale survey quantifying synthetic musks across East China Sea coastal waters and linking concentrations to anthropogenic gradients, providing essential baselines for risk assessment and policy.
Clinical Implications: No direct clinical change, but findings inform exposure awareness for coastal communities and support advocacy for safer fragrance chemistry and wastewater controls.
Key Findings
- Ten synthetic musks measured at 76 coastal/estuarine sites; summed concentrations up to 31 ng/L.
- Spatial heterogeneity of SMs linked to water quality parameters and population density.
- Study area receives ~63% of China’s annual riverine discharge, underscoring terrestrial inputs.
Methodological Strengths
- Large spatial coverage (76 sites) with multi-compound analysis.
- Correlation analyses with environmental and demographic covariates.
Limitations
- Cross-sectional design without temporal replication limits seasonal inference.
- Ecotoxicological endpoints and sediment/biota compartments not covered in the abstract.
Future Directions: Seasonal/longitudinal monitoring, inclusion of sediments and biota, mixture toxicity studies, and source apportionment to guide mitigation.
Synthetic musks (SMs) are widely used fragrance compounds in personal care products and household products, and have been recognized as emerging contaminants of global concern due to their persistence, bioaccumulation potential, and ecological risk. However, their occurrence in marine environments-particularly in coastal waters-remains unclear. We conducted a large-scale investigation of SMs in the estuarine and coastal waters off eastern China, which receive approximately 63% of the total annual riverine discharge from the Chinese mainland. The spatial heterogeneity of SM concentrations and their relationships with water quality parameters and population density were further analyzed. Ten synthetic musks were analyzed in water samples from 76 sites along the coast, with their sum concentrations ranging from below the reporting limit to 31 ng L
3. Antimicrobial effect of cinnamaldehyde in a peri-implant mucositis model.
In a polymicrobial biofilm model on zirconia and titanium, a 1% cinnamaldehyde mouthwash reduced biomass and metabolic activity comparably to chlorhexidine. Effects were observed across biofilms derived from both periodontal health and gingivitis saliva donors.
Impact: Demonstrates a natural-compound mouthwash matching chlorhexidine’s anti-biofilm activity on implant-relevant materials, motivating clinical evaluation as a potential alternative with different side-effect and resistance profiles.
Clinical Implications: If efficacy and safety are confirmed in humans, 1% cinnamaldehyde mouthwash could offer an alternative to chlorhexidine for managing peri-implant mucositis biofilms, potentially mitigating staining and taste disturbance issues.
Key Findings
- On zirconia, mouthwash and chlorhexidine reduced cellular metabolism vs negative control (p<0.05).
- On titanium, biomass and viable counts were higher for biofilms from periodontal-health saliva; experimental mouthwash decreased biomass in both salivary conditions.
- Overall antimicrobial effect of 1% cinnamaldehyde was similar to chlorhexidine against polymicrobial biofilms.
Methodological Strengths
- Use of human saliva-derived polymicrobial biofilms from distinct periodontal conditions.
- Comparative testing on clinically relevant substrates (zirconia and titanium) with an active control (chlorhexidine).
Limitations
- In vitro model with small group sizes; limited donor diversity (two donors per condition).
- Single concentration tested; no safety, sensory, or clinical outcomes assessed.
Future Directions: Dose–response testing, mechanism-of-action studies, and randomized clinical trials assessing peri-implant mucositis outcomes and tolerability versus chlorhexidine.
OBJECTIVE: Evaluate the antimicrobial effect of an experimental mouthwash containing 1 % cinnamaldehyde in a polymicrobial biofilm model for peri-implant mucositis. MATERIALS AND METHODS: Polymicrobial biofilms were seeded on zirconia and on titanium (n = 6 or 8/group) surfaces from stimulated saliva collection from 2 periodontal health donors and 2 with gingivitis. Salivary pellicle was performed, by 60 min. Inoculum was seeded (1 ×10 RESULTS: In zirconia, evaluation of cellular metabolism did not detect a statistically significant difference between the biofilm conditions (p > 0.05). It was found that cellular metabolism was decreased from exposure to mouthwash and chlorhexidine, with a difference compared to the negative control (p < 0.05). In titanium, viable cell count in two media and the biomass were higher for biofilms from the periodontal health salivary condition (p < 0.05). There was a decrease in the biomass of biofilms exposed to the experimental mouthwash for both salivary conditions. Metabolic activity was decreased when exposed to experimental mouthwash and chlorhexidine compared to the negative control (p < 0.05). CONCLUSIONS: Experimental mouthwash with 1 % cinnamaldehyde showed an antimicrobial effect similar to chlorhexidine against polymicrobial biofilms.