ABSTRACT

Taste blindness to the bitterness of thiourea compounds such as phenylthiocarbamide (PTC) and 6-n-propylthiouracil (PROP) is inherited (1). Approximately 30% of Caucasians in Western Europe and the United States can be classified as PROP/PTC nontasters. The other 70% are considered tasters and perceive these compounds as moderately bitter (medium tasters) or extremely bitter (supertasters) (2).