There is such a thing as the opposite of a supertaster. It’s a person with up to 50% fewer taste buds on their tongues than the rest of us average folks. These people are called, rather uncreatively, “non-tasters.” I guess it goes to show that for every superpower there’s a foil. Bizarro World had its evil anti-version of Superman. In our own world we’ve got “non-tasters” which are, admittedly, a whole lot less interesting.