There’s a gene that decides whether cilantro tastes like soap.

A closer look

There’s a gene that decides whether cilantro tastes like soap. About 10% of people carry a variation in a receptor for aldehydes, the molecules in cilantro’s leaf oil. To those with this version, the herb tastes sharp and soapy rather than fresh. What feels like a quirky food preference is actually biology hardwired at the DNA level. Beyond cilantro, personal nutrition is moving into this territory. Instead of one-size-fits-all diets, future recommendations may be tuned to your gene set—making the phrase 'listen to your body' far more literal. Imagine receiving real meal advice based on enzymes your cells do or don’t produce. So when a friend mocks your hatred of guacamole, you can counter with: 'It’s not me, it’s my genome.' That’s not just witty—it’s a preview of how food and health will be personalized in the decades ahead.