It depends on the chemical. CO2 is not electrophilic, but something like an aldehyde, typically biochemically formed by oxidation, is electrophilic and reactive

It depends on the chemical. CO2 is not electrophilic, but something like an aldehyde, typically biochemically formed by oxidation, is electrophilic and reactive. The body biochemically oxidizes ethanol to acetaldehyde, whose reactivity gives it carcinogenic properties. Toxic aldehydes formed when fats degrade include acrolein and malondialdehyde: "Malondialdehyde results from lipid peroxidation of polyunsaturated fatty acids." 1. https://en.wikipedia.org/wiki/Acetaldehyde https://en.wikipedia.org/wiki/Acetaldehyde 2. https://en.wikipedia.org/wiki/Malondialdehyde https://en.wikipedia.org/wiki/Malondialdehyde