Is It Giving You Cancer?
Recently published in Readers Digest, by
“In the 1940s, botanist E. J. Kraus of the University of Chicago fed five and a half grams of pure 2,4-D to a cow every day for three months. The cow was fine, according to Kraus, as was her calf. Kraus said he himself had eaten half a gram of the stuff every day for three weeks and felt great. This was apparently good enough for the rest of the country; within five years, American companies were annually producing 14 million pounds of the stuff. By 1964, the number had jumped to 53 million pounds.
Today, annual sales of 2,4-D have surpassed $300 million worldwide, and it’s found in “weed and feed” products, like Scotts Green Sweep, Ortho Weed B Gon, Salvo, Weedone, and Spectracide. At first, its impact on humans seems mild—skin and eye irritation, nausea, vomiting, dizziness, stiffness in the arms and legs—and many lawn-care companies have dismissed health concerns. Plus, the businesses add that the amount of chemicals in sprays is very diluted.
But the effects are more worrisome when considered over time. Because 2,4-D is designed to mimic a plant’s natural growth hormone, it causes such rapid cell growth that the stems of treated plants tend to become grotesquely twisted and their roots swollen; the leaves turn yellow and die; and the plants starve to death (2,4-D does not have this effect on grass).
Unsurprisingly, 2,4-D also appears to affect human hormones. The National Institute of Health Sciences lists it as a suspected endocrine disrupter, and several studies point to its possible contribution to reproductive-health problems and genetic mutations. Although the EPA says there isn’t enough evidence to classify 2,4-D as a carcinogen, a growing body of research has begun to link it to a variety of cancers.
A 1986 National Cancer Institute (NCI) study found that farmers exposed to 2,4-D for 20 or more days a year had a sixfold higher risk of developing non-Hodgkin’s lymphoma. Another NCI study showed that dogs were twice as likely to contract lymphoma if their owners used 2,4-D on their lawns.
Like flame retardants, this compound also tends to accumulate inside people’s homes even days after the lawn has been sprayed. One study found 2,4-D in the indoor dust of 63 percent of sampled homes; another showed that levels of the chemical in indoor air and on indoor surfaces increased after lawn applications. After 2,4-D was sprayed, exposure levels for children were ten times higher than before the lawns were treated—an indication of how easily the chemical is tracked inside on the little feet of dogs, cats, and kids.”