Tablets made from “miracle fruit” have gone on sale in Japan. After you take one, anything sour you eat for the next couple of hours tastes sweet.
No, honest, that’s what the story says:
One pink-colored tablet is made of three miracle fruit berries, Shimamura said. When people eat or lick the fruit’s red berries, any sour thing they eat or drink a minute later tastes sweet for about two hours. This is because the protein miraculin firmly binds to sweet receptor cells in a person’s tongue when sour substances are present. The protein then transmits a false message to the brain, resulting in a strong, sweet taste.