I am an avid label reader and have learned what most of the tricks are. I stick to as few ingredient as possible on the label. I won't buy grown in Mexico food or pet food manufactured in China.
My DD had a college friend that was vegan and gluten free and all her food had to be organic and nothing with a face being a part of it. I thought she was recovering from an illness when I first met her. She didn't know that organic growers at the farmer's market used animal manure as fertilizer. She tried to get others to protest that and make a scene over it. My DD distanced herself from her and I was curious to what the sad girl ever found to eat