Alkenals are alpha-beta unsaturated carbonyl compounds that are susceptible to peroxidation and damaging to the body.

“if you think about that term alkenal that i talked about from the paper they are alpha beta unsaturated carbonyl compounds this is the carbonyl group the oxygen double bonded to a carbon and you have an alpha and a beta carbon here this unsaturation is the double bond that is why molecules are called polyunsaturated or monounsaturated the number of double bonds between the carbons so this is an alpha beta unsaturated carbonyl is an alkene now now the problem with alkyne als is that they're very susceptible to peroxidation to uh reactions which make them uh damaging to our body”