Although all Gardenburger products are vegetarian, some of them are not vegan and include animal-derived ingredients such as eggs or dairy products, such as milk and cheese. Their vegan burgers are the Black Bean Chipotle, Flame Grilled, GardenVegan (which is also soy free) and Veggie Medley; the vegan specialties include BBQ Riblets, Chik’n Grill, Herb Crusted Cutlet, and Veggie Breakfast Sausage. Their website also list wheat free, gluten free, and soy free dietary preferences as well as vegan.
In 2005, Gardenburger filed for bankruptcy, though they continued operation by becoming privately held.
In 2006, Gardenburger announced that it had taken eggs out of all of its products except for one private-sourced item which now contains organic, cage-free eggs.
In 2007, Kellogg Company purchased the Wholesome and Hearty Foods Company, makers of the Gardenburger.