In Michael Pollan's book, In Defense of Food: An Eater's Manifesto, he is telling his reader to stop being so paranoid about macronutrients (those would be fats, carbs and proteins) and micronutrients (vitamins and minerals) and instead just get back to the basics and eat what our grandmothers would recognize as food; that means no aerosol spray cheese or Apple Jack's cereal straws (one of the ingredients incidentally is 'sheanut'. Any guesses?) .
The message of Pollan's book, summarized in it's very last sentence, is this: "The cook in the kitchen preparing a meal from plants and animals at the end of the shortest of food chains has a great many things to worry about, but 'health' is simply not one of them, because it is a given".
That means, in the case of animals, skipping the stop at the feed lots and factory farms, the chemistry labs, the assembly line industrial slaughter houses, massive scale meat processing plants, and the long hauls in refrigeration trucks.
The best way to ensure the safety and quality of meat products is to know where they are coming from or even better, to take a little road trip to visit the farms (might a recommend a Saturday jaunt to Everdale Farm) that our eggs, chicken, pork, turkey, beef, lamb, goat, bison, or venison are coming from. After that, we may find that we don't want to eat them quite as often, and that when we do, we opt for the best quality available.