We do not accept returns but are happy to replace any item damaged in shipping. // Cara-Sel is made in a facility that also processes foods containing tree nuts, peanuts, eggs, soy, and wheat. // Cara-Sel does not contain any artificial preservatives, yet the shelf life prior to opening is at least one year. It is best stored out of direct sunlight and high temps. Once opened, it could last for months in your refrigerator...but we have yet to meet anyone with that kind of willpower.