Unless we have a reference to the original scientific paper it is impossible to say anything about this.

"Researchers believe that white wine contains acetaldehyde"...? Well, it ought to be pretty easy to find out via the wonders of deformulation - or maybe they could have just Googled it, since the science has already been done.

(Acetaldehyde can also be found in bread, various fruit and other foodstuffs, incidentally - so have another glass of wine and don't worry about it )

Antioxidants are helpful, if there are none present, I would assume there is no ‘help’. Detrimental, though? Dunno.