Numerous studies are carried out by Yves Rocher Laboratories to ensure the perfect safety of all our products (we comply with Good Manufacturing Practice regulations). For Oleo-infusion, a stability study of the botanical oils was carried out, particularly to avoid any alteration (oxidation) that could affect the final quality of the formula. Also, the pure, oily (hydrophobic) composition of Oleo-infusion makes it by nature a very low microbiological risk formula. As for the petals, we have selected rose petals that have been sterilized beforehand using a process that allows us to guarantee the microbiological safety of our formula while preserving the aesthetic aspect of the petals.