The validated hypoallergenic (vh) rating system was initiated in 1988 to try to objectively validate the “hypoallergenic” claim in cosmetics.
To show how the system rates cosmetic hypoallergenicity and to compare the prevalence of cosmetic contact dermatitis (CCD) among users of regular cosmetics versus cosmetics with high VH numbers.
(1) Made a VH list based on top allergens from patch-test results published by the North American Contact Dermatitis Group (NACDG) and the European Surveillance System on Contact Allergies (ESSCA); (2) reviewed global regulatory, cosmetic, drug, packaging, and manufacturing practices to show how allergens may contaminate products; (3) compared cosmetic ingredients lists against the VH list to obtain the VH rating (the more allergens absent, the higher the VH rating); and (4) obtained CCD prevalence among users of regular cosmetics versus users of cosmetics with high VH ratings.
(1) Two VH lists (1988, 2003) included only cosmetic allergens in the NACDG surveys, the third (2007) included cosmetic and potential contaminant noncosmetic allergens, and the fourth (2010) adds ESSCA patch-test surveys. (2) CCD prevalence is 0.05 to 0.12% (average, 0.08%) among users of cosmetics with high VH ratings versus 2.4 to 36.3% among users of regular cosmetics.
The VH rating system is shown to objectively validate the hypoallergenic cosmetics claim.
From the VMV Skin Research Centre + Clinics, Makati, Philippines. Address reprint requests to Vermeén M. Verallo-Rowell, MD, VMV Skin Research Centre + Clinics (VSRC), 117 C. Palanca Street, Legazpi Village, Makati, Philippines 1200. E-mail: firstname.lastname@example.org