Acidity gives wine its freshness and vibrancy. Discover which acids occur in wine and how they influence flavour and ageing potential.
Acidity is one of the fundamental components of wine and is crucial for its freshness, vibrancy, and ageing potential. It is what gives a wine its "bite" and prevents it from tasting flat or dull. You perceive acidity in wine as a tingling, refreshing sensation on the tongue and the sides of the palate — it stimulates salivation and makes you reach for the next sip.
Several natural acids are found in wine:
Tartaric acid is the most important and most stable acid in wine. It occurs almost exclusively in grapes and is preserved throughout the entire winemaking process. At cold temperatures, tartaric acid can settle as wine crystals (potassium bitartrate) at the bottom of the bottle or on the cork — this is completely harmless and a hallmark of minimally processed wines.
Malic acid is the second major acid in grapes. It tastes sharper and greener than tartaric acid — similar to a green apple. During malolactic fermentation, malic acid is converted into softer lactic acid, making the wine rounder.
Lactic acid is produced through malolactic fermentation and tastes noticeably softer and creamier than malic acid. Most red wines and many premium white wines undergo this "second fermentation" to round off acidity.
Citric acid occurs naturally in small amounts and may be added in some wine regions for acidity correction.
Acidity is the counterpart to sweetness and ensures balance in wine. A wine with high residual sugar needs sufficient acidity to avoid tasting cloying — which is why German Rieslings work so well: the combination of sweetness and vibrant acidity makes them remarkably harmonious.
In dry wines, acidity provides structure and freshness. It lifts the fruit aromas and makes the wine more lively. A wine with too little acidity tastes flat and dull; a wine with too much acidity seems aggressive or green.
Climate has an enormous influence on acidity levels:
Cool climate zones (Germany, northern France, New Zealand) produce wines with high acidity. The grapes ripen more slowly, retain more acid, and simultaneously develop fine aromas.
Warm climate zones (southern Spain, California, Australia) lead to lower acidity levels. The grapes lose acidity more quickly during ripening, resulting in softer, rounder wines — sometimes at the expense of freshness.
Acidity is a wine's best friend at the table! It cuts through fat, cleanses the palate, and enhances the flavours of food. This is why high-acid wines pair superbly with:
If you prefer high-acid wines, look for:
If you prefer softer wines:
Acidity is one of the fundamental components in wine and crucial for freshness, liveliness and ageing potential. It gives the wine "bite" and prevents it from tasting flat or dull. You perceive it as a tingling, refreshing sensation on the tongue and the sides of the palate; it stimulates salivation.
The most important and most stable is tartaric acid, followed by malic acid, which tastes sharper and greener like a green apple. Through malolactic fermentation, malic acid is converted into milder, creamier lactic acid. Citric acid occurs in small amounts and may in some cases be added to correct acidity.
Malic acid tastes sharp and green, similar to a green apple. Lactic acid arises from it through malolactic fermentation and tastes distinctly softer and creamier. Most red wines and many high-quality white wines undergo this "second fermentation" to round off the acidity.
High in acidity are varieties such as Riesling, Sauvignon Blanc, Grüner Veltliner and Albariño among white wines, as well as Nebbiolo and Sangiovese among red wines. Cooler wine regions (Germany, Loire, Alto Adige) and younger wines also bring more acidity, since acidity breaks down over time.
Cool climate zones such as Germany, northern France or New Zealand produce wines with high acidity, since the grapes ripen more slowly and retain more acidity. Warm climate zones such as southern Spain, California or Australia lead to lower acidity values and softer, rounder wines, sometimes at the expense of freshness.
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