Questo post non è tanto a proposito di uova alla diossina, quanto sull'immane casino in cui ci siamo messi in generale. Allora, nel testo che segue trovate un commento di Eric Berger ("Sciguy") su un recente articolo che dimostra come le uova dei polli ruspanti ("free range") contengono oltre cinque volte più diossina dei polli in batteria ("caged"). Conclude Berger che per i polli è meglio vivere in un prato, ma per gli esseri umani sono meglio mangiare polli allevati in batteria.
Premesso che questi risultati sono validi per Taiwan, dove pare ci sia pieno di inceneritori, credo che la situazione laggiù non sia differente dalla nostra e se lo fosse ci stiamo comunque rimettendo in pari rapidamente facendo inceneritori anche da noi. Ma la sostanza del discorso è che ci siamo messi veramente in un immane casino se dei polli che stanno in un prato finiscono per fare uova alla diossina e ti tocca concludere che è meglio allevarli in una gabbia con dei mangimi artificiali, magari riempiendoli di antibiotici, ormoni, e chissà che altro.
Certe volte uno si sente totalmente impotente..... non resta che leggersi l'articolo di Berger e rabbrividire.
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From "Sciguy"
June 16, 2010
Free range chickens: Good for them, bad for you?
Free-range chickens are sometimes advertised as an exceptionally clean, healthy and delicious source of essential protein. Well, of course they're delicious. They taste like chicken. But are they really cleaner and healthier?Oh, don't get me wrong. It's vastly better for the chickens. But scientists are finding there may be a down-side to human health from free-range chickens.
A new study in the Journal of Agricultural and Food Chemistry (see full article) finds that the eggs of free-range chickens may contain five times the amount of some pollutants.
Being a free-range hen means the chickens have continuous daytime access to open-air runs, covered by vegetation, and during half of their lives have at least 1 square meter to themselves. However, as free range hens spend most of their lifetime in an outside environment, they have a better chance of being exposed to contaminants from the environment, scientists say.
Taiwanese scientists analyzed the eggs of free-range chickens at various sites in Taiwan and compared them to the eggs of caged birds. The found that the levels of dioxins (specifically PCDDs and PCDFs) was 5.7 times higher in the free-range chickens than in the caged animals.
There are important caveats to the study: Taiwan has a lot of municipal waste incinerators that produce dioxins. And the samples were relatively small. However, it's also worth noting that previous studies have found elevated levels of dioxins in free-range birds.
The study, therefore, provides another reminder than terms like "organic" and "free-range" that are commonly used to sell foods does not always mean the foods are better or safer for you. Caveat emptor.
