ABSTRACT
Individual differences in sensitivity to the bitterness of phenylthiocarbamide (PTC) and 6-n-propylthiouracil (PROP), which are genetically determined, have been well documented in the literature and reviewed else-where in this volume. An individual who does not perceive PTC and PROP as bitter is referred to as a nontaster (NT) and one who does as a taster (T). More recently, the taster group has been further subdivided into medium tasters (MTs) and supertasters (STs), the latter group comprising individuals who are most sensitive to the bitterness of PTC/PROP (1).
