You are what you eat?

A trifling little Tweet:

Interview with JDF Says he's a vegetarian. Somehow, I could never imagine a heldentenor being veggie;-)

brought forth this response from Ruth:

I see that from the other angle - can't imagine a veggie becoming a Heldentenor...

and made me ponder the correlation between voice-type and diet, or favoured food. Plácido Domingo's voice has been described as 'chocolate', Gerald Finley is a connoisseur of fine wines. I'm the sort of off-pitch mezzo or alto who falsely claims to be a vegetarian* whilst capriciously ignoring the likelihood of meat stock in my leek soup, a phenomenon also spotted in Neath.

I expect that Jonas Kaufmann eats steak for breakfast, and Dmitri Hvorostovsky regularly snacks on Beluga Caviar. I am sure we can all think of singers who, surely, feast on broken glass on toast.

Does the food cause the voice-type or the voice-type the food preference?

*I don't actually, but please don't let facts interrupt when I'm on a roll!