PurO3 Ozonated Olive Oil combines organic, cold-pressed, extra virgin olive oil and ozone, giving you an oxygen-rich, soothing salve. Ozonated olive oil has been used for over a century on various skin problems. PurO3 Ozonated Olive Oil is fully saturated with ozone. It is made under strict controls using only organic and natural ingredients. Pur03 is packaged using glass containers to retain its purity. Olive has a medium shelf life so refrigeration may be necessary for irregular usage. Refrigeration is unnecessary if you plan on using all of the product within six months.