Umami is the savory taste that makes foods like broth, ramen, aged cheese, tomatoes, mushrooms, soy sauce, and cooked meat taste rich and satisfying. It is often called the fifth taste because it is distinct from sweet, sour, salty, and bitter. In nutrition and food science, umami matters because it helps explain why some foods taste hearty even when they are not high in fat.
Understanding umami can also help cooks build flavor while using less salt.
Key Facts
- Umami is mainly triggered by glutamate, an amino acid found naturally in many protein-rich and aged foods.
- Common umami compounds include glutamate, inosinate, and guanylate.
- Glutamate + inosinate or guanylate creates taste synergy, making umami taste stronger than either compound alone.
- MSG stands for monosodium glutamate, a sodium salt of glutamate used to add umami flavor.
- Umami is detected by taste receptors on the tongue, especially receptors such as T1R1 + T1R3.
- Reducing salt while adding umami-rich ingredients can maintain flavor because savoriness increases perceived depth and fullness.
Vocabulary
- Umami
- Umami is the savory taste associated with glutamate and often described as rich, meaty, brothy, or mouth-watering.
- Glutamate
- Glutamate is an amino acid that acts as a major chemical signal for umami taste.
- Inosinate
- Inosinate is a nucleotide found in foods such as meat and fish that strongly enhances umami when paired with glutamate.
- Guanylate
- Guanylate is a nucleotide found in foods such as dried mushrooms that boosts umami when combined with glutamate.
- Taste receptor
- A taste receptor is a protein on taste cells that binds specific food molecules and starts a nerve signal to the brain.
Common Mistakes to Avoid
- Calling umami the same as salty is wrong because saltiness is mainly caused by sodium ions, while umami is mainly caused by glutamate and related compounds.
- Assuming MSG is an artificial flavor only is wrong because MSG contains glutamate, which is also naturally present in tomatoes, cheese, seaweed, and mushrooms.
- Thinking more umami always means more protein is wrong because umami can increase during aging, drying, fermenting, or cooking without directly measuring total protein.
- Ignoring synergy between ingredients is wrong because combining glutamate-rich foods with inosinate-rich or guanylate-rich foods can greatly intensify savory taste.
Practice Questions
- 1 A soup recipe uses 600 mL of broth and contains 0.30 g of MSG. What is the MSG concentration in grams per liter?
- 2 A cook reduces the salt in a sauce from 5.0 g to 3.5 g and adds mushrooms for umami. What percent decrease in salt was made?
- 3 Explain why adding dried mushrooms to a tomato-based broth can make it taste more savory even if no meat is added.