Natural Wine: An Introduction

Natural wine has no single agreed legal definition — it is a philosophy and movement rather than a regulated category. The core principle is minimal intervention in both vineyard and winery. In the vineyard: organic or biodynamic farming, no synthetic inputs. In the winery: spontaneous fermentation with indigenous yeast (no added commercial yeasts), no or minimal sulphite additions (SO₂), no fining agents, no filtration, and no other additives. The goal is wine that expresses its terroir and vintage without manipulation. In practice, "natural" is a spectrum: some producers add nothing at all (zero-zero), others add tiny amounts of sulphite at bottling. The absence of legal definition means the label can be applied inconsistently — but the community around natural wine is reasonably self-regulating through tastings, critics and importer curation. See natural wine explained for a full introduction.

Natural wines often taste noticeably different from conventional wines of the same variety or region — sometimes dramatically so. Common characteristics include a cloudy or hazy appearance (unfiltered), slight petillance (residual CO₂ retained as a preservative without SO₂), more pronounced oxidative or reductive notes, unpredictable variability from bottle to bottle, and a tendency toward less primary fruit and more savoury, earthy or fermentation-character complexity. At its best, natural wine expresses terroir with unusual directness and energy. At its worst, it can show faults (Brettanomyces, volatile acidity, excessive oxidation) that would be considered defects in conventional wine. The category rewards buyers with knowledgeable guidance — a good natural wine merchant or sommelier is essential for navigating the quality variation.

Many natural wines, especially those bottled without filtration or sulphites, retain a small amount of dissolved CO₂ from fermentation. In conventional winemaking, wines are typically degassed (CO₂ removed) before bottling; natural winemakers often skip this step, using the residual CO₂ as a natural preservative in place of sulphites. The result is a slight pétillance — a gentle, almost imperceptible fizz — that can be mistaken for a fault but is intentional. Some producers also bottle wines during primary fermentation (the ancestral method), producing pétillant naturel (pét-nat) with more pronounced natural bubbles. See how sparkling wine is made for the ancestral method explained.

The environmental case for natural and organic viticulture is stronger than the health case. Organic and biodynamic farming demonstrably reduces synthetic pesticide and herbicide use, improves soil microbial diversity, and reduces chemical runoff into surrounding ecosystems. The evidence on whether organic wine is better for human health is far less conclusive — the amount of pesticide residue in conventionally farmed wine is generally at trace levels, and the reduction from organic farming, while real, is unlikely to be clinically significant in normal consumption. The claim that low-sulphite natural wine causes fewer headaches is also not well-supported: the primary cause of wine headaches is alcohol and histamines (particularly in red wine), not sulphites. Many conventional wines contain less total sulphite than natural wines with high levels of fermentation-produced sulphur. The environmental credentials are real; the health claims require more scrutiny.