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How does taste work?
Quick answer
Taste works by sensors on your tongue detecting chemicals in food and sending signals to your brain. Taste buds pick up five basic tastes — sweet, sour, salty, bitter, and umami — while smell adds most of the flavor you actually experience.
Step by step
- Taste buds on the tongue hold chemical-sensing cells.
- They detect five basic tastes: sweet, sour, salty, bitter, umami.
- Each sends nerve signals to the brain, which identifies the taste.
- Smell contributes most of what we call 'flavor.'
- Taste evolved to seek nutrients and avoid toxins.
People also ask
What are the basic tastes?
Sweet, sour, salty, bitter, and umami (savory); everything else we 'taste' is mostly smell combined with these.
Why does food taste bland with a cold?
A stuffy nose blocks smell, which provides most of flavor, so food tastes flat even though basic taste still works.
Why are we born liking sweet and disliking bitter?
Sweetness signals energy-rich food, while bitterness often warns of toxins, so these preferences helped our ancestors survive.
Part of the guide: How Your Body Works →