Research
Latest published research we're tracking.
The newest skincare and haircare papers from PubMed, linked to the ingredients we decode. Summaries are the authors' own abstracts — we excerpt, attribute, and link out to the source.
130 papers under Contact allergy
15-Year Experience of Patch Testing during Pregnancy: Retrospective Case-Control Study from a Tertiary Israeli Center.
Dermatology (Basel, Switzerland) · 2026
<h4>Introduction</h4>Although patch testing (PT) is not contraindicated during pregnancy, most dermatologists defer testing due to lack of data and possibility that immunological changes might influence outcomes. In our center, we routinely perform PT during pregnancy as it is not known to be teratogenic and may lead to significant improvements in quality of life. This study aimed to assess… Read on PubMed →
Allergic Contact Dermatitis to Terminalia Chebula Fruit Extract in Antiaging Creams.
Contact dermatitis · 2026
Systemic Contact Dermatitis Triggered by Benzalkonium Chloride in Laundry Detergent A Case Initially Misdiagnosed as Eczema.
Clinical, cosmetic and investigational dermatology · 2026
This case shows that benzalkonium chloride is an important sensitizer for contact dermatitis.The patient did not respond to conventional eczema treatment. Pathological examination and detailed history-taking revealed that benzalkonium chloride in the detergent was the causative factor. After avoiding exposure to this allergen, the condition improved, emphasizing the need to consider contact… Read on PubMed →
Occupational Airborne Allergic Contact Dermatitis From UV-Curing Printing Varnish.
Contact dermatitis · 2026
Axillary Contact Dermatitis in an Adult Caused by Hexamidine Diisethionate From Baby Wipes Labelled "Pure Water".
Contact dermatitis · 2026
Patterns of Sensitization and Cross-Reactivity in Hair Dye Allergy: An 18-Year Tertiary-Center Experience from Greece.
Dermatitis : contact, atopic, occupational, drug · 2026
<u><b><i>Abstracts:</i></b></u> <u><b><i>Background:</i></b></u> Hair dye-related allergic contact dermatitis (ACD) is a common problem among both consumers and professionals. The main sensitizers are aromatic amines such as para-phenylenediamine (PPD) and toluene-2,5-diamine (TDA), which can also cross-react with chemically related compounds.<u><b><i>Objective:</i></b></u> To analyze patch-test… Read on PubMed →
Fragrance components in cosmetic products: an analysis of labels.
Anais brasileiros de dermatologia · 2026
Methylchloroisothiazolinone and Methylisothiazolinone 10 Years After Regulation: A Case Story of Liquid Soaps and Shampoos.
Contact dermatitis · 2026
<h4>Background</h4>Contact allergy to methylchloroisothiazolinone (MCI) and methylisothiazolinone (MI) remains common in the EU despite regulation.<h4>Objectives</h4>To assess the extent of use of MCI/MI and MI in cosmetic products on the Danish market, identify product categories involved and evaluate compliance of rinse-off products with the 15 ppm limit.<h4>Materials and methods</h4>Products… Read on PubMed →
Benzalkonium Chloride in Eye Drops Causing Allergic Contact Dermatitis: A Case Series.
The Australasian journal of dermatology · 2026
We present three patients who developed allergic contact dermatitis (ACD) from benzalkonium chloride (BAK) in ophthalmic drops. BAK is a preservative commonly found in ophthalmic formulations and there is a rising trend of ACD to this allergen. The irritant and sensitising properties of BAK on the ocular mucosa will be discussed. This paper will also explore BAK allergy from eye drops in patients… Read on PubMed →
Association Between Contact Allergy to Epoxy Resin and Fragrance Mix I in the General Population: EDEN Fragrance Study Group.
Contact dermatitis · 2026
Allergic Contact Dermatitis Associated With Hydroxyacetophenone: Two Case Reports.
Contact dermatitis · 2026
Allergic Contact Dermatitis From Norway Spruce Resin in a Wound Ointment (Abilar)-A Case Suggesting Primary Sensitization.
Contact dermatitis · 2026
A Cross-Sectional Study of Contact Allergens in Hotel Personal Care Products in Canada, the United States and Europe.
Contact dermatitis · 2026
<h4>Background</h4>Personal care products (PCPs), such as shampoos, conditioners and body washes, can contain ingredients that may cause allergic contact dermatitis (ACD). Hotels commonly offer complimentary toiletries; however, there is limited data regarding the allergen content of these products.<h4>Objective</h4>This study aims to identify allergens within PCPs that may cause ACD in hotels… Read on PubMed →
A decade of trends in patch test allergen sensitisation from a dermatology centre in Southeast Asia.
Indian journal of dermatology, venereology and leprology · 2026
Background Geographical and socioeconomic factors influence the type of allergens causing allergic contact dermatitis. Aim To investigate the changing trends of allergen sensitisation among patch-tested patients. Methods A retrospective study was performed on patients undergoing patch testing (PT) over 11 years (2012-2022). Data were retrieved from medical records. Results A total of 1035 patients… Read on PubMed →
Potential side effects of toxic and restricted substances found in cosmetics declared to be of natural origin.
Frontiers in public health · 2026
<h4>Introduction</h4>Cosmetic products are an integral part of daily life. However, although the regulatory framework for such products appears strict, customer safety and product quality are not guaranteed. A large proportion of consumers prefer using cosmetic products that contain natural substances to avoid exposure of their skin to chemicals. Nevertheless, some of the products marketed to meet… Read on PubMed →
A multicenter study by the Brazilian Society of Dermatology on a new standard patch test series.
Anais brasileiros de dermatologia · 2026
<h4>Background</h4>The prevalence of allergic contact dermatitis (ACD) differs across various populations, and the sensitization rate can change constantly as new products are introduced to the market. The current Brazilian standard series of patch tests has been used for over two decades. Therefore, the development of a new Brazilian standard series is important to ensure that contact tests… Read on PubMed →
Contact Allergy and Allergic Contact Dermatitis From Propylene Glycol and Related Glycols: Cosmetic Skin Sensitisers After All?
Contact dermatitis · 2026
<h4>Background</h4>Propylene glycol (PG) is widely used in cosmetic and pharmaceutical products, yet data on the prevalence of contact allergy to PG and related glycols, and their potential cross-reactivity, remain limited.<h4>Objectives</h4>To determine the prevalence of glycol contact allergy, describe clinical characteristics and assess potential cross-reactivity.<h4>Methods</h4>We… Read on PubMed →
Preservatives in Leave-On Cosmetics Available on the Dutch Market.
Contact dermatitis · 2026
Contact Allergy to Propolis: Update 2013-2025.
Dermatitis : contact, atopic, occupational, drug · 2026
<u></u>This article is an update of our previous review of propolis published in <i>Dermatitis</i> in 2013. It provides brief general information on propolis and a full update of the literature published between March 2013 and May 2025 on contact allergy to propolis, including results of testing in consecutive patients, data on testing in groups of selected patients, case reports, and case series… Read on PubMed →
Pediatric Allergic Contact Dermatitis: Sensitization Patterns for a Practical Panel.
International archives of allergy and immunology · 2026
<h4>Background</h4>Allergic contact dermatitis (ACD) is increasingly recognized in the pediatric population. Although patch testing is the gold standard for diagnosis, the absence of standardized, evidence-based pediatric patch test panels and limited access to comprehensive allergen series in many settings pose significant diagnostic challenges. This study aimed to evaluate a practical and… Read on PubMed →