Adequacy of the default values for skin surface area used for risk assessment and French anthropometric data by a probabilistic approach

The notes of guidance for the testing of cosmetic ingredients and their safety evaluation by the Scientific Committee on Consumer Safety (SCCS) is a document dedicated to ensuring the safety of European consumers. This contains useful data for risk assessment such as default values for Skin Surface Area (SSA).A more in-depth study of anthropometric data across Europe reveals considerable variations. The default SSA value was derived from a study on the Dutch population, which is known to be one of the tallest nations in the World. This value could be inadequate for shorter populations of Europe.Data were collected in a survey on cosmetic consumption in France. Probabilistic treatment of these data and analysis of the case of methylisothiazolinone, a sensitizer recently evaluated by a deterministic approach submitted to SCCS, suggest that the default value for SSA used in the quantitative risk assessment might not be relevant for a significant share of the French female population. Others female populations of Southern Europe may also be excluded.This is of importance given that some studies show an increasing risk of developping skin sensitization among women. The disparities in anthropometric data across Europe should be taken into consideration.