Food and potions? well except for the last resort healing potion there is not much use for them.
BUT the flesh eating for elves are amazing. I put them on the hotbar and it brings one of the strongest healing for just one ap.
Most (all?) consumables are 1AP. You may want to heal yourself and then cast a healing spell unto another. Elf have no advantage in that respect.
I have found though there is no point in keeping consumables. The whole eating thing is pointless and no-one does it. The only thing worth it is Honey (and the odd thing like Lohse guitar)
Larian are trying to force the issue by changing most of the "Blood Rose" to just "Rose" which you can't craft into the elixir but only use as a one-off potion.
This is a crappy idea. Whereas before you could make 3 potions now you can make one. If you play solo this makes a big difference - if you don't it really doesn't.
Unless you want to prep for a fight by eating a rose (not a blood rose obviously), strumming your lute and smearing yourself with honey I suppose.