Government Agencies, such as the EPA, have stringent regulations to certify such products. They also require that the manufactures thoroughly communicate toxicity information to its purchasers and users. The difference between a therapeutic dose and a toxic dose is mainly a matter of quantity. The quantity of ingestion is therefore a primary unit by which the toxicity of a product is measured. Quantities of ingestion or exposure are not absolute for all individuals.
Body weight is important when determining a toxic dose.
A toxic dose for someone at 100 pounds of body weight may not be the same for someone at 200 pounds. In laboratory testing, usually rats are used to determine toxicity. This rating fairly evaluates toxicity risk by products. Caffeine 192 Pyrethrin 200 Window cleaner Aq. Therefore the above-identified comparison represents an accurate comparison.