Most experimental Hermetia prepupae production has been done with manure as a feedstock, but they have also been produced on grain based diets and other organic products such as waste food including meats and dairy products unacceptable for vermiculture. The addition of fish offal to manure has been shown to increase the omega-3 fatty acid content of prepupae to approximately 3% (St-Hilaire et al. 2007b).