Researchers have reported the first scientific elucidation for one of the most widely known rules of thumb for blending wine with food: "Red wine with red meat, white wine with fish."
Scientists in Japan have claimed that the unpleasant, fishy aftertaste noticeable when consuming red wine with fish results from naturally occurring iron in red wine.
The researchers reported their finding in ACS' Journal of Agricultural and Food Chemistry, a bi-weekly publication.
The scientists asked wine tasters to sample 38 red wines and 26 white wines while dining on scallops. Some of the wines contained small amounts of iron, which varied by country of origin, variety, and vintage.
They found that wines with high amounts of iron had a more intensely fishy aftertaste. This fishy taste diminished, on the other hand, when the researchers added a substance that binds up iron.
The findings indicate that iron is the key factor in the fishy aftertaste of wine-seafood pairings, the researchers say, suggesting that low-iron red wines might be a good match with seafood.