Must

Freshly crushed grape juice, skins, seeds, and sometimes stems before or during fermentation.

<h2>What it means in wine</h2> <p>Must is the raw material from which wine is fermented. Its composition includes sugar, acid, phenolics, aroma precursors, and solids.</p> <h2>Why it matters</h2> <p>The word is especially useful in explaining fermentation, extraction, pressing, and fortification.</p>