as long as one doesn't use something like canola oil, how long does soap usually last before it expires. i also read in several places that using grapefruit seed extract is a preservative, but none of the sources gave the amount. i usually use lard, OO, CO, castor oil as the sap oils, and then super fat with say grapeseed oil or sweet almond or something like that as well as adding aloe vera gel 100% and of course EOs i would hate to sell and give soap away and it turns out that there should have been an expiration date on it somewhere.