Supertasters

The concept of the 'supertaster' originated in the 1990s through the work of experimental psychologist Dr. Linda Bartoshuk. While studying taste perception, Bartoshuk discovered that some individuals reported an intense, lingering bitter aftertaste from substances like saccharin and the chemical compound 6-n-propylthiouracil (PROP). She identified that these individuals possessed a higher density of fungiform papillae—the visible bumps on the tongue that house taste buds—than the average population. This physiological difference allows them to experience taste sensations with an intensity often two to three times greater than that of a 'medium' or 'average' taster.

Scientific classification typically divides the population into three groups: non-tasters, medium tasters, and supertasters. Estimates suggest that approximately 25% of the population falls into the supertaster category, while another 25% are classified as non-tasters, who find certain compounds to be flavorless. The remaining 50% are considered average tasters. This variation is not merely a matter of preference but is rooted in both anatomy and genetics, specifically linked to the TAS2R38 gene, which influences sensitivity to bitter compounds found in many foods and beverages, including coffee.

For the coffee industry, understanding supertasting is essential for sensory analysis and product development. Because coffee contains bitter compounds like caffeine and chlorogenic acids, a supertaster may perceive a standard specialty coffee as overwhelmingly bitter or astringent compared to an average taster. This heightened sensitivity can influence a consumer's preference for lighter roasts, which may retain more acidity and complex fruit notes, versus darker roasts, which can amplify the perceived bitterness that a supertaster might find unpleasant or overwhelming.

Farmers and roasters must navigate these sensory differences when aiming for broad market appeal. While specialty coffee often celebrates the nuanced bitterness and acidity of high-quality beans, the existence of supertasters explains why some consumers may consistently reach for milk, sugar, or specific roast profiles to balance their experience. It is important to note that being a supertaster is not a 'superpower' that makes one a better taster; rather, it is a state of heightened sensory input that can make the experience of drinking coffee more challenging or intense.

Research into taste genetics continues to evolve, with recent studies linking the TAS2R38 gene to broader dietary behaviors and health outcomes. While the term 'supertaster' has become common in popular culture, researchers like John Hayes of Penn State University emphasize that it is a descriptive term for a specific biological variation rather than a measure of professional tasting ability. In professional coffee cupping, sensory calibration is used to ensure that tasters, regardless of their genetic sensitivity, can identify and score coffee based on standardized protocols rather than individual intensity thresholds.

Ultimately, the story of the supertaster serves as a reminder that the 'coffee experience' is subjective and biologically grounded. For the coffee professional, recognizing that a customer or colleague may be experiencing a cup of coffee with vastly different intensity levels is a vital component of sensory education. As the industry continues to refine its understanding of flavor perception, the role of genetics remains a foundational, if often overlooked, element of how we define quality and enjoyment in the cup.