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Ein oft wiederholter Irrtum, gerade auch im politischen Bereich ist das Bestehen vieler Leute darauf das man Essen aus ökologischen Anbau kaufen sollte weil es gut für die Natur ist und keine Tiere gequält werden. Das ist als Argument schon richtig. Viel zentraler sind aber die mittlerweile bewiesenen gesundheitliche Vorteile, dieser Kommentar in der NY Times nimmt darauf Bezug
So what kind of bird would fit more accurately with our agrarian fantasies? Well, how about one that spends most of its life outdoors? Such birds - called pastured birds - are able to move around freely. Instead of having to be injected with antibiotics to stay healthy, they doctor themselves, seeking out certain plants at certain times of the year for pharmacological reasons. Because they expend so much energy moving around, they also grow more slowly: it takes them a month longer to reach slaughter weight than factory birds, which is one of the reasons pasturing is less attractive to industrial farmers. Scientific research comparing the health benefits of conventionally raised turkey to pastured turkey is scarce, but some work has been done on chickens. A study sponsored by the Department of Agriculture in 1999, for example, found that pastured chickens have 21 percent less fat, 30 percent less saturated fat, 50 percent more vitamin A and 400 percent more omega-3 fatty acids than factory-raised birds. They also have 34 percent less cholesterol.The pasture principle isn't limited to fowl. Compared to most American beef, which is raised on a grain-intensive diet, pasture-fed beef offers 400 percent more vitamin A and E. It is also much richer in beta-carotene and conjugated linoleic acids, all of which inhibit cancer. It's also higher in omega-3 fatty acids, which are a major inhibitor of heart disease. These benefits don't exist at these levels in animal that are fed an unvaried and unnatural diet.