I trust EAS because I have a good friend in the Masters program for physical therapy at Boston University and he says the testing results on EAS products are more consistant with what the ingredients/label claims are in the product. I've been using EAS for a few years and love the results, so I stick with it. LaBrada products are also very good. Met-Rx, TwinLab, Optimum Nutrition, Cytodyne, etc all have very good products as well, many of which I've used in the past. Just be sure to do the research and see what product best suits your personal needs.