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If it’s already oxidized it’s not trying to steal any electrons - the oxygen already has. Case in point - CO2 is the most oxidized form of carbon and is very low energy and nonreactive.

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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 2. https://en.wikipedia.org/wiki/Malondialdehyde

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