Research Reference

Cosmetic Allergy
Incidence, Diagnosis, and Management

You can see the paper here

1. Introduction

This article explores a recent UK survey showing that a considerable number of people, especially women, face adverse reactions to personal care products like cosmetics. It emphasizes the importance of accurately diagnosing cosmetic allergies, pointing out common triggers like fragrance chemicals and preservatives. The article also touches on the challenges in defining cosmetics and differences in regulations between Europe and the US, aiming to give a clear overview of the prevalence and management of cosmetic allergies.

2. Method

  • Patch testing
  • A skin test used to find the cause of a possible allergic reaction on the skin.

  • Repeated open application tests (ROAT)
  • The product is applied directly to a samll area of skin and the treated area observed to see whether contact dermatitis arises.

Patch Testing

  1. semi-open test
  2. They are useful modifications of patch testing for identifying potential allergenic products that have a certain irritation potential.

  3. photopatch testing
  4. It is to determine if your skin rash is caused by an allergy to certain chemicals that come in contact with your skin, an allergy to UV light, or a chemical that is activated by sunlight.

3. Common Allergen

Fragrance
  • a category (not an individual ingredient)
  • Allergic reaction: volatile or photosensitive patterns of contact dermatitis
  • account for 30-45% allergic reaction in eczema patient
Preservative

Preservatives as common allergens:

Parabens
  • 99%of leave-on products
  • 77%of rinse-off products
Formaldehyde
  • rarely used as a preservative
  • may be released by other preservatives
  • Thus it won’t be in the ingredient label!
Other Beauty Product
  • Hair Care Product
  • Nail Polish and Artificial Nails
  • Lip Cosmetics
  • Eye Cosmetics