Reduction in wine refers to a lack of oxygen during winemaking, creating sulfurous, meaty, or vegetal off-aromas (reduction is the opposite of oxidation). Reduction can occur during fermentation (particularly cold fermentation) or storage under anaerobic conditions. Mild reduction aromas (struck match, smoke) are intentional in some natural wines. Excessive reduction creates faults (rotten egg, cabbage) requiring correction through aeration or racking. Understanding reduction vs. oxidation is critical for wine health assessment.
WHY IT MATTERS FOR COLLECTORS
Mild reduction aromas are acceptable and sometimes valued; excessive reduction indicates faults. Aeration (decanting or aerating) can help correct minor reduction.
Related terms
Put your wine knowledge to work
Know what to open tonight — and never miss a wine at its peak.
Build a cellar, track windows, and pair from what you actually own.
Free Taster: up to 100 bottles · 20 AI scans · 10 pairings / month
Free forever · No credit card