Thanks to the fast growing market in cosmetics, in addition to its traditional use as for food, the Argan oil is now becoming famous worldwide, and its quality must be ascertained for customer satisfaction, and maximized income of producers. A large part of VAO is produced in women cooperatives under a large program aimed at sustainably developing the Argan forest as well as contributing to the income of rural families (Charrouf and Guillaume, 2008a). In these cooperatives stringent production rules are applied (Charrouf et al., 2002), like the mandatory use of high quality fruits.