Daily Cosmetic Research Analysis
Today’s top cosmetic-related studies span complication monitoring, consumer product safety, and minimally invasive tumor management. A longitudinal cohort identified IL-2R and ferritin as dynamic biomarkers linked to hypercalcemia in foreign body granulomas from cosmetic oil injections; a Kenyan market analysis documented multiple chemicals of concern in hair relaxers; and a propensity-matched comparison suggests radiofrequency ablation may be a safe, cosmetically favorable alternative to paroti
Summary
Today’s top cosmetic-related studies span complication monitoring, consumer product safety, and minimally invasive tumor management. A longitudinal cohort identified IL-2R and ferritin as dynamic biomarkers linked to hypercalcemia in foreign body granulomas from cosmetic oil injections; a Kenyan market analysis documented multiple chemicals of concern in hair relaxers; and a propensity-matched comparison suggests radiofrequency ablation may be a safe, cosmetically favorable alternative to parotidectomy for superficial pleomorphic adenoma.
Research Themes
- Biomarker-guided monitoring of cosmetic filler/oil complications
- Consumer safety and regulatory compliance in cosmetic hair relaxers
- Minimally invasive ablative therapy for cosmetically sensitive tumors
Selected Articles
1. Value of inflammatory markers for monitoring disease severity and progression in granuloma induced by cosmetic oil injections.
In a 48-month longitudinal cohort of 109 men with cosmetic oil–induced foreign body granulomas, ionized calcium correlated positively with IL-2R, ACE, and ferritin, and IL-2R correlated with 1,25(OH)₂D₃. Hypercalcemia and suppressed PTH were associated with elevated IL-2R and ferritin at baseline, which decreased over time in treated hypercalcemic patients while increasing in untreated normocalcemic patients.
Impact: Establishes IL-2R and ferritin as dynamic biomarkers linked to calcium dysregulation in cosmetic oil granulomas, informing monitoring and immunomodulatory treatment decisions.
Clinical Implications: Use IL-2R and ferritin alongside calcium and 1,25(OH)₂D₃ to monitor disease activity and guide timing/intensity of immunomodulation in cosmetic oil granulomas with hypercalcemia risk.
Key Findings
- Ionized calcium positively correlated with IL-2R, ACE, and ferritin; IL-2R correlated with 1,25(OH)₂D₃ at baseline.
- Hypercalcemia and suppressed PTH were associated with elevated baseline IL-2R and ferritin concentrations.
- Over time, IL-2R and ferritin decreased in hypercalcemic patients (some receiving immunomodulators) and increased in untreated normocalcemic patients.
Methodological Strengths
- 48-month longitudinal follow-up with repeated measures and mixed-effects modeling
- A priori stratification by calcium status and PTH levels
Limitations
- Observational, nonrandomized design with potential residual confounding
- Male-only cohort; treatment regimens not standardized
Future Directions: Prospective studies to validate thresholds for IL-2R/ferritin as response markers and trials testing biomarker-guided immunomodulation to prevent hypercalcemia.
OBJECTIVE: Cosmetic oil injections can cause foreign body granulomas, leading to inflammation-driven extrarenal production of activated vitamin D (1,25(OH) MATERIALS AND METHODS: 109 male patients were stratified according to baseline calcium status. 28 % had hypercalcemia, and 72 % normocalcemia. Normocalcemic patients were subdivided based on serum parathyroid hormone (PTH) concentrations into suppressed (< 2.0 pmol/L, n = 30) or normal (≥ 2.0 pmol/L, n = 49) concentrations. Blood samples were collected over 48 months and longitudinal changes in inflammatory markers and calcium homeostasis were examined using Pearson correlation and mixed model analyses. RESULTS: IL-2R, ACE, and ferritin were positively correlated with serum concentration of ionized calcium, while IL-2R was associated with serum 1,25(OH) CONCLUSIONS: Positive correlations were observed at baseline between ionized calcium concentrations and IL-2R, ionized calcium and ferritin, and 1,25(OH)₂D₃ and IL-2R. Hypercalcemia and suppressed PTH was associated with elevated IL-2R and ferritin concentrations at baseline. Over time, IL-2R and ferritin concentrations decreased in patients with hypercalcemia, some treated with immunomodulatory drugs. IL-2R and ferritin concentrations increased in untreated patients with normocalcemia.
2. Innovative properties of sustainable galactomannans from seeds of Adenanthera pavonina, Caesalpinia pulcherrima and Delonix regia.
Seed-derived galactomannans demonstrated favorable rheology (texture/spreadability), cytocompatibility, hemocompatibility, mucoadhesion, and no irritation in HET-CAM testing, supporting their suitability for biomedical and cosmetic formulations. BioAp and BioDr showed the strongest antimicrobial effects (MICs in the 512 μg/mL range), suggesting added preservative potential.
Impact: Introduces sustainable biopolymers with verified safety, mucoadhesiveness, and antimicrobial activity, directly relevant to next-generation cosmetic vehicles and topical delivery systems.
Clinical Implications: Supports development of cleaner-label, biobased excipients for topical/cosmetic formulations with improved spreadability and inherent antimicrobial properties, potentially reducing synthetic preservatives.
Key Findings
- Galactomannans showed no cytotoxicity, hemolysis, or HET-CAM irritation, indicating favorable safety.
- BioAp and BioDr exhibited the strongest antimicrobial activity (MIC ≈ 512 μg/mL).
- Desirable formulation attributes were demonstrated, including texture, spreadability, and mucoadhesiveness.
Methodological Strengths
- Multidimensional assessment (rheology, biocompatibility, antimicrobial, mucoadhesion, irritation)
- Consistent in vitro safety profile across assays
Limitations
- Primarily in vitro assessments; no human clinical testing
- Antimicrobial MICs are moderate and may require formulation optimization
Future Directions: Formulation-scale studies in cosmetic vehicles and early-phase clinical safety/acceptability trials; structure–function optimization to enhance antimicrobial efficacy.
Given the importance of new renewable resources for the industrial sector, this study aimed to assess the innovative technological and biological properties of galactomannans derived from the seeds of Adenanthera pavonina (BioAp), Caesalpinia pulcherrima (BioCp), and Delonix regia (BioDr). The biopolymers were evaluated using various parameters, including texture, spreadability, cytocompatibility, hemocompatibility, antimicrobial assays, mucoadhesiveness, and irritation potential by HET-CAM test. The absence of cytotoxicity, hemolysis, and irritation showed the potential of the three biopolymers for applications in biomedical fields. BioAp and BioDr samples exhibited the most effective antimicrobial activity, with MICs of 512 μg mL
3. Chemicals of concern in select packaged hair relaxers available on the Kenyan market: an examination of ingredient labels and measurement of pH.
Across 22 hair relaxers identified via a survey of 746 women, 27 chemicals of concern were documented from labels, nearly half being fragrance constituents; many products also listed undisclosed 'fragrance/parfum'. EU-prohibited/restricted substances were present, although pH values met Kenyan standards. The work underscores the need for consumer education and chemical quantification beyond labels.
Impact: Provides systematic, market-relevant evidence of chemicals of concern in widely used hair relaxers, informing regulation and consumer safety in cosmetic product use.
Clinical Implications: Clinicians should counsel frequent hair relaxer users on potential allergen/endocrine risks, and policymakers should consider targeted regulation and disclosure standards; pH compliance does not ensure overall safety.
Key Findings
- Twenty-seven chemicals of concern were identified from labels across 22 relaxers; 48.2% were fragrance chemicals (e.g., limonene, linalool).
- 63.6% of relaxers listed undisclosed ingredients as 'fragrance' and/or 'parfum'.
- EU-prohibited (14.8%) and restricted (55.6%) substances appeared in labels; all products met Kenyan pH standards (11–13).
Methodological Strengths
- Large cross-sectional survey (n=746) to identify market-relevant products
- Systematic label audit against CSC Red List and EU regulations, plus laboratory pH measurements
Limitations
- Label-based assessment may omit undeclared or inaccurately reported ingredients; no chemical quantification performed
- Findings may not generalize beyond sampled counties/brands
Future Directions: Conduct analytical chemistry (e.g., LC-MS/MS) to quantify labeled and unlabeled CoCs and link exposure profiles to health outcomes in longitudinal cohorts.
BACKGROUND: There is an emerging interest in the investigation of hair relaxers as important sources of exposure to chemicals of concern (CoCs) and their associated adverse health effects. We focused on documentation of CoCs by examining labels of selected relaxers currently available on the market in Nakuru and Embu Counties, Kenya and measured the pH profiles to ensure compliance with Kenya Bureau of Standards. METHODS: We enrolled 746 women aged 15-50 years in a cross-sectional study, which ascertained participants' sociodemographic characteristics, personal care products use in the last 7-14 days and ever use of hair dyes and chemical relaxers including the brand names of products used. Based on participants' questionnaire responses and product availability at beauty shops and supermarkets, we purchased 22 different relaxer products. The label of each product was reviewed and we recorded relaxer strength, manufacturer and location, listed ingredients, and other claims. To identify CoCs, we cross-checked the list of ingredients against the Campaign for Safe Cosmetics' (CSC) Red List and European Union's prohibited and restricted substances (Annex II and III respectively), Regulation 1223/2009 on cosmetics. The pH profiles of each product were determined using a benchtop pH meter. RESULTS: Twenty-seven CoCs were documented upon examination with each relaxer listing more than one CoC. Thirteen out of 27 (48.2%) were fragrance chemicals with d-limonene/limonene and linalool, each being listed as an ingredient in 9 products. Fourteen (63.6%) relaxers had undisclosed ingredients listed as 'fragrance' and/or 'parfum'. Six of the identified CoCs are classified as Tier 1 (Do not use for everyone) per CSC Red List while 14.8% (4) are prohibited and 55.6% (15) are restricted substances per EU regulations. The pH values of the relaxers were within Kenya Bureau of Standards required range of 11-13. CONCLUSION: These findings create awareness of CoCs listed on labels of selected hair relaxers. This justifies the need for consumer education on potentially harmful chemicals and their associated risks. Further, our findings justify the need for laboratory study to evaluate and quantify CoCs that are listed as well as those that are not listed on the label.