Pyrethroids are extremely important for protecting agricultural crops from insect damage. They are approved by most, if not all, government regulatory agencies around the world, including the US EPA and EU regulatory authorities for use on food and fiber crops.
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More than 120 crops worldwide can be treated with pyrethroids and regulators have mandated studies that ensure that any resulting traces of chemical found on or in resulting consumer products are at concentrations below human and animal safety thresholds set to include large margins of safety (often 100 fold).