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Thomas J. Hoogheem
Monsanto Agricultural Co St Louis, Mo

JAMA. 1989;262(19):2679.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor. —

The May 5 issue¹ of THE JOURNAL contains inaccurate and misleading information on the toxicological properties of Roundup herbicide (the trade name for the isopropylamine salt of glyphosate).

The author has misinterpreted the study by Maibach.² The study was done on the entire formulation, not just the active ingredient. The results from this study found that the herbicide did not induce skin irritation, skin sensitization, photoirritation, or photosensitization in human volunteers. In light of these findings, the reports of contact dermatitis in California agricultural workers are highly suspect. Indeed, my investigation into these reports shows that no medical confirmation exists for any of these cases.

In regard to the issue of tumors, the Environmental Protection Agency does not consider glyphosate to be a weak oncogen. The Environmental Protection Agency classification for a weak oncogen is class C. Glyphosate is listed as class D: inadequate . . . [Full Text PDF of this Article]

Footnotes
Edited by Drummond Rennie, MD, Deputy Editor (West) and Don Riesenberg, MD, Senior Editor.

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