Since you mentioned it cold brew coffee is less acidic vs hot coffee and I think(?) less than hot tea as well.
OTOH cold brewed tea probably edges out all of them in terms of low acidity.
Not too sure if you meant hot or cold tea, just adding some extra info :) For me cold brew coffee is way, way easier to drink and it’s become my daily go-to.
If they’ve been dead for a while then the body is going to be quite decayed so that unfortunate person would end up dying again immediately.
Unless you’re suggesting this thing that came to life is no longer human. So in that case decayed body/flesh, missing organs/bodyparts, etc. no longer prevent it from “life”. But I’d argue that isn’t a human coming back to life, more like a corpse transforming into something else.