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Related Experiment Videos

Sunscreen allergy in Singapore

P Ang1, S K Ng, C L Goh

  • 1National Skin Centre, Singapore.

American Journal of Contact Dermatitis : Official Journal of the American Contact Dermatitis Society
|April 4, 1998
PubMed
Summary

Sunscreen allergy is uncommon, with only 5 out of 61 patients showing positive reactions. The primary causes identified were Parsol MCX and oxybenzone, indicating specific ingredient sensitivities.

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Area of Science:

  • Dermatology
  • Allergology
  • Epidemiology

Background:

  • Sunscreen allergy, though concerning, lacks extensive epidemiological data.
  • Identifying common allergens is crucial for patient management and product formulation.

Purpose of the Study:

  • To determine the incidence and causative agents of sunscreen allergy.
  • To analyze patch and photopatch test results for suspected sunscreen allergies.

Main Methods:

  • Retrospective analysis of 61 patients with suspected sunscreen allergy.
  • Patch and photopatch testing conducted between 1992 and 1996.
  • Evaluation of reactions to a specific sunscreen test series.

Main Results:

  • Five out of 61 patients (8.2%) exhibited positive patch test reactions to sunscreens.
  • Two patients were diagnosed with photoallergic reactions, and three with allergic contact dermatitis.
  • The main allergens identified were 2-ethylhexyl-4-methoxycinnamate (Parsol MCX) and 2-hydroxy-4-methoxybenzophenone (oxybenzone).

Conclusions:

  • Sunscreen contact allergy is infrequent in clinical practice.
  • Parsol MCX and oxybenzone are significant allergens in sunscreen-induced contact dermatitis.
  • Further research into sunscreen ingredient hypersensitivity is warranted.

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