Some people find cilantro revolting, and this aversion may be due to a genetic variation. People with this genetic variation have olfactory-receptor genes that allow them to strongly perceive the soapy-flavored aldehydes in cilantro leaves. This genetic quirk is found in a small percentage of the population, with a higher incidence in East Asians. Interestingly, regions where cilantro is popular, like Central America and India, have fewer people with this genetic variation, which may explain its prevalence in those areas. Some studies suggest that repeated exposure to crushed cilantro may help cilantrophobes overcome their aversion. However, many people choose to avoid cilantro altogether due to their genetic inclinations.