In general, the maximum tolerated limits of residues in foods have been decreasing over the years, although exposure has not decreased sufficiently still due to legacy compounds in the environment and new chemicals introduced.
Wigle, D. Exposure to pesticides is a common way for individuals to develop MCS, and once the condition is present, pesticides are often a potent trigger for symptoms of the condition.
But, while pesticides can help to protect crops from insects, weeds and other pests and support increased agricultural yields, they are also potentially toxic to humans and can lead to serious health consequences and even death.
Residue levels may be even higher than this because the analytical methods now employed in the US detect only about one-third of the pesticides in use Minyard and Roberts Notwithstanding, in plant products, different substances were found in measurable concentrations including recent and old crop protection chemicals and, although the food authority EFSA assessed the risk to consumers as low, recommendations were deemed necessary to further improve food safety and abate consumers exposure through diet EFSA Other pesticides may also alter thyroid hormone levels and potentially cause thyroid disease.
PS contributed with literature review and editing. Soil invertebrates including nematodes, springtails, mites, micro-arthropods, earthworms, spiders, insects and other small organisms make up the soil food web and enable decomposition of organic compounds such as leaves, manure, plant residues etc.
Pimentel, D. Risk from naturally occurring toxins in foods-- as well as from pesticide residues-- depends on the dosage of the chemical, the time of exposure, and the susceptibility of the individual human.
Pesticides are toxic to living organisms.