Here at Organic Lab, we are committed to using only truly natural, non-toxic ingredients and avoiding synthetic preservatives; although all of our formulations do feature natural preservative systems. Most of our water-based products contain a natural preservative, which helps to prevent the growth of mold and bacteria. Many of our products also contain Vitamin E, Sodium Phytate, which act as a natural preservative. To ensure that your products are used within a time of optimal freshness and efficacy, we recommend storing all of our products in a cool, dry place and out of direct sunlight and using them within 12 months of purchase.