#OR6A2

Cilantro, known as phak chee in Thai, brightens tom yum, elevates larb, and finishes many street-side soups. A small but vocal segment of diners finds its flavor soapy. New research shows this aversion is genetic, not simply a personal preference, offering a fresh lens on how Thais experience food.

In Thai cuisine, cilantro’s citrusy zing is celebrated for lifting dishes from sour to savory. Yet the soapy bitterness has puzzled cooks and diners for years. Research indicates that genetic differences influence how cilantro tastes to different people.

For many Thais, cilantro (known locally as phak chee) is inseparable from everyday cuisine — sprinkled on tom yum, incorporated into larb, or simply used as a fresh garnish on soups and street-side noodles. Yet, a curious minority recoil at its presence, describing its taste as reminiscent of soap. Recent research confirms this odd aversion is grounded in genetics rather than culinary preference, reshaping our understanding of food appreciation in Thailand and globally.