This page has a helpful graphic showing the reference dose for several chemicals, including caffiene: https://geneticliteracyproject.org/2017/04/18/caffeine-40

This page has a helpful graphic showing the reference dose for several chemicals, including caffiene: https://geneticliteracyproject.org/2017/04/18/caffeine-40-times-toxic-glyphosate-herbicide/ https://geneticliteracyproject.org/2017/04/18/caffeine-40-ti...