1、Our Home-Grown Melamine Problem By JAMES E. McWILLIAMSPublished: November 17, 2008 Austin, Tex. CHINAS food supply appears to be awash in the industrial chemical melamine. Dangerous levels have been detected not only in milk and eggs, but also in chicken feed and wheat gluten, meaning that melamine
2、is almost impossible to avoid in processed foods. Melamine in baby formula has killed at least four infants in China and sickened tens of thousands more.In response, the United States has blasted lax Chinese regulations, while the Food and Drug Administration, in a rare move, announced last week tha
3、t Chinese food products containing milk would be detained at the border until they were proved safe.For all the outrage about Chinese melamine, what American consumers and government agencies have studiously failed to scrutinize is how much melamine has pervaded our own food system. In casting stone
4、s, weve forgotten that our own house has more than its share of exposed glass. To be sure, in China some food manufacturers deliberately added melamine to products to increase profits. Makers of baby formula, for example, watered down their product, lowering the amount of protein and nutrients, then
5、 added melamine, which is cheap and fools tests measuring protein levels. But melamine is also integral to the material life of any industrialized society. Its a common ingredient in cleaning products, waterproof plywood, plastic compounds, cement, ink and fire-retardant paint. Chemical plants throu
6、ghout the United States produce millions of pounds of melamine a year.Given the pervasiveness of melamine, its always possible that trace elements will end up in food. The F.D.A. thus sets the legal limit for melamine in food at 2.5 parts per million. This amount is indeed minuscule, a couple of san
7、d grains in an expanse of desert that pose no real threat to public health. Moreover, the 2.5 p.p.m. figure is calculated for a person weighing 132 pounds a cautious benchmark given that the average adult weighs 150 to 180 pounds. But these figures obscure more than they reveal. First, while adults
8、eat about one-fortieth of their weight every day, toddlers consume closer to one-tenth. Although scientists havent measured the differential impact of melamine on infants versus adults, its likely that this intensified ratio would at least double (if not quadruple) the impact of legal levels of mela
9、mine on toddlers.This doubled exposure might not land a child in the hospital, but it could certainly contribute to the long-term kidney and liver problems that we know are caused by chronic exposure to melamine. On a more concrete note, melamine not only has widespread industrial applications, but
10、is also used to buttress the foundation of American agriculture.Fertilizer companies commonly add melamine to their products because it helps control the rate at which nitrogen seeps into soil, thereby allowing the farmer to get more nutrient bang for the fertilizer buck. But the government doesnt r
11、egulate how much melamine is applied to the soil. This melamine accumulates as salt crystals in the ground, tainting the soil through which American food sucks up American nutrients. A related area of agricultural concern is animal feed. Chinese eggs seized last month in Hong Kong, for instance, con
12、tained elevated levels of melamine because of the melamine-laden wheat gluten used in the feed for the chickens that produced the eggs. To think American consumers are immune to this unscrupulous behavior is to ignore the Byzantine reality of the global gluten trade. Tracking the flow of wheat glute
13、n around the world, much less evaluating its quality, is like trying to contain a drop of dye in a churning whirlpool.More ominous, the United States imports most of its wheat gluten. Last year, for instance, the F.D.A. reported that millions of Americans had eaten chicken fattened on feed with mela
14、mine-tainted gluten imported from China. Around the same time, Tyson Foods slaughtered and processed hogs that had eaten melamine-contaminated feed. The government decided not to recall the meat. Only a week earlier, however, the F.D.A. had announced that thousands of cats and dogs had died from mel
15、amine-laden pet food. This high-profile pet scandal did not prove to be a spur to reform so much as a red herring. Our attention was diverted to Fido and away from the animals we happen to kill and eat rather than spoil.Frightening as this all sounds, the concerned consumer is not completely helples
16、s. We can seek out organic foods, which are grown with fertilizer without melamine unless that fertilizer was composted with manure from animals fed melamine-laden feed (always possible, as the Tyson example suggests). We could further protect ourselves by choosing meat from grass-fed or truly free-
17、range animals, assuming the grass was not fertilized with a conventional product (something thats also very hard to know).But as all the caveats above indicate, these precautions will only go so far. Melamine, after all, points to the much larger relationship between industrial waste and American fo
18、od production. Regulations might be lax when it comes to animal feed and fertilizer in China, but take a closer look at similar regulations in the United States and it becomes clear that theyre vague enough to allow industries to “recycle” much of their waste into fertilizer and other products that
19、form the basis of our domestic food supply.As a result, toxic chemicals routinely enter our agricultural system through the back channels of this under-explored but insidious relationship. So, sure, lets keep the heat on China. And, yes, lets take with a big dose of skepticism the Chinese government
20、s assurances that theyre improving the food supply. At the same time, though, instead of delivering righteous condemnation, the United States should seize upon the melamine scandal as an opportunity to pass federal fertilizer standards backed by consistent testing for this compound, which could very well be hidden in plain sight.From , November 17, 2008Note: James E. McWilliams, a history professor at Texas State University at San Marcos, is the author of “American Pests: The Losing War on Insects From Colonial Times to DDT.”
