Answer:
All of the ingredients in Wysong Diets fulfill nutritive and functional purposes, and there are no fillers, artificial additives, or the like. We encourage you to visit the following web pages to learn the rationale behind the new formulations and for each of our ingredients (http://www.wysong.net/dietfeatures.php and http://m.wysong.net/?diet=epc).

Our experience in feeding hundreds of thousands of animals and humans for the past 35 years is that a blend of inorganics and proteinates is beneficial, not toxic. We are also well aware of the potential dangers of excess copper as can be found in this e-healthletter by Dr. Wysong: http://wysongeducation.net/?wehl=2013/december/13.

Please see these links for further information:

Vitamin and Mineral Safety: http://www.wysong.net/pet-health-and-nutrition/vitamin-and-mineral-safety.php

Toxins: http://www.wysong.net/pet-health-and-nutrition/wysong-products-and-toxins.php