Anergen is a hypoallergenic canine/feline diet formulated with immune stimulating technology and alternative protein sources to address food allergies/sensitivities. It is created by a veterinarian and owes its popularity solely to veterinary recommendation and word of mouth. For decades Anergen hypoallergenic dog food and cat food has been a remarkable alternative option for companion animals no longer able to tolerate conventional pet food protein sources and ingredients. This improved formulation is designed to take advantage of new processing methods to preserve natural value， and nutritional advances in epigenetics and nutrigenomics. Anergen is higher in protein and fat， and contains a comprehensive spectrum and higher levels of micronutrients/nutraceuticals including prebiotics， probiotics， enzymes， omega-3s， antioxidants and more. Small quantities of fruits and vegetables mimic what may be consumed in the viscera of prey， and contribute important vitamins， minerals， antioxidants and other nutrients.