How Non-Alcoholic Beer Is Made: Brewing Methods Explained

Non-alcoholic beer is made using one of four main methods: vacuum distillation, reverse osmosis, arrested fermentation, or dilution. The method a brewery uses has a massive impact on how the final beer tastes. Understanding these processes helps explain why Athletic Brewing tastes so different from Heineken 0.0, even though both are technically non-alcoholic. Here is how each method works.

1. Vacuum Distillation (Dealcoholization)

The most common method. The brewery makes regular beer, then heats it under vacuum to evaporate the alcohol at a lower temperature (around 35C instead of 78C). This preserves more flavor than boiling but still strips out some volatile aroma compounds. Used by Heineken 0.0, Guinness 0.0, and most large-scale NA producers. The advantage is consistency and scale. The downside is that the beer can taste slightly cooked or thin compared to the original.

2. Reverse Osmosis

The beer is pushed through a membrane that separates water and alcohol from the flavor compounds. The alcohol is then distilled off and the flavor concentrate is recombined with water. This produces a closer-to-original taste than vacuum distillation because the flavor compounds are never heated. Used by some premium craft NA producers. More expensive and slower than vacuum distillation.

3. Arrested (Limited) Fermentation

Instead of making beer and removing alcohol, this method prevents alcohol from forming in the first place. The brewer uses special yeast strains or stops fermentation early before significant alcohol is produced. Athletic Brewing uses a version of this approach, which is why their beers taste so fresh and hop-forward. The advantage is maximum flavor retention. The challenge is that it requires precise process control and different yeast management.

4. Dilution

The simplest method: brew a very strong beer, then dilute it with water until the ABV drops below 0.5%. This is the cheapest approach but generally produces the worst-tasting results. The beer tastes watery because it literally is watered down. Few reputable craft breweries use this method today.

Find the Best-Tasting NA Beers

Now that you understand the methods, you can make better choices. Generally, arrested fermentation and reverse osmosis produce the best-tasting results. The NA Drink Finder app on ChatGPT can help you find beers made with specific brewing methods. Install from the ChatGPT App tab, then type @NA Drink Finder and ask which NA beers use arrested fermentation or which taste closest to real beer.