All of our products undergo the gentlest system of preservation available, so it is with great confidence that we observe an approximate shelf life of 12 months with consistent and continual use of the products. Some of our products will last longer, depending on the blend, essential or botanical oils used, and proper storage. At 6-9 months (or so), some botanical oils/essential oils (if not stored properly in a cool environment) can become rancid and/or lose their potency. For any natural product with a mild preservative, use your best judgment. If it develops an odd odor, it should be disposed of. The use of fresh product is always best for optimal effect.