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A pesticide is defined as any substance or mixture of substances used to prevent, destroy, repel, or mitigate any pest. These include insecticides (affects insects), herbicides (affects plants and weeds) and fungicides (affects fungi). The main advantage of using pesticides is its ability to produce a high yield in crops.

In the US, according to the Dietary Supplement Health Education Act (DSHEA) in 1994, dietary supplements were defined as a type of food meant to supplement the diet but could not be represented as conventional foods. Broadly speaking, this includes vitamins, minerals. herbs, concentrates, metabolites, extracts or combinations