In order to evaluate this hypothesis, Soxhlet extractions with hexane were realized at ambient temperature and at hexane boiling point (69 ◦ C) for 4 h. The results are shown in Fig. 4, at 69 ◦ C, extraction led to oil polyphenol contents of 217, 356 and 221 mg GAE/kg oil for type 1, type 2 and type 3 seeds, respectively