Tannins, proteins, and astringency

Tannins can interact with salivary proteins and oral surfaces, changing lubrication and tactile perception.

Concentration, tannin structure, saliva, and the wine matrix all affect the result.

Wine tannins differ in size, subunit composition, origin, extraction history, and evolution. Salivary proteins also vary among people and over time. Astringency therefore emerges from a dynamic system, which helps explain why texture descriptions can differ even when tasters agree that a wine is tannic.

During ageing, tannins, pigments, oxygen exposure, precipitation, and the wine matrix evolve together. Some sensations may feel more integrated, but ‘tannins polymerise and become soft’ is too simple as a universal mechanism. Describe the observed change first and keep the chemical explanation proportional to the available evidence.

Compare tea samples before and after a small addition of a safe protein-containing food or drink, accounting for allergies and dietary needs. Treat the result as a household analogy, not a wine experiment. Record changes in lubrication, bitterness, drying, and persistence separately.