Non-alcoholic beer - how it is made and why it keeps getting better
Non-alcoholic beer was for years associated with something inferior, watery and devoid of flavour, something you reached for out of necessity rather than pleasure. But that has changed, and radically. Today good non-alcoholic beers can taste almost like their alcoholic counterparts, and the category is growing at a dizzying pace. But how is it even possible? Since alcohol forms naturally during fermentation, when yeast eats sugar, how do you make a beer that tastes like beer but contains practically no alcohol? The answer is a fascinating combination of several clever production methods. Once you learn them, you will understand why some non-alcoholic beers are bland and others full of flavour. Here is a guide to how non-alcoholic beer is made and why it tastes better and better today.
Where alcohol comes from at all
To understand how to remove alcohol, you first need to know where it comes from. In normal beer alcohol forms during fermentation: the yeast eats the sugars from the malt and turns them into alcohol and carbon dioxide. It is a natural, unavoidable effect of brewing beer, described more fully in how beer is made. The problem is that the flavour of beer and its alcohol are born in the same process - you cannot simply skip fermentation, because then no flavour forms either. That is why making a good non-alcoholic beer is a challenge: you must either prevent alcohol from forming while keeping the flavour, or remove the alcohol already formed without destroying the aroma. Hence the various production methods, which divide into two great families. Understanding this dilemma is the key to everything else.
Two main routes
All methods of making non-alcoholic beer can be split into two basic groups. The first is the biological route: the beer is made so that as little alcohol as possible forms, by arresting fermentation or using special yeast. The second is the physical route: a normal alcoholic beer is brewed, and then the alcohol is removed from it. Put graphically, in the first approach we do not let the alcohol form, and in the second we get rid of it after the fact. Each of these routes has its variants, advantages and drawbacks, which affect the final taste. That is why non-alcoholic beers differ so much from one another - they are made by entirely different methods. The four most important techniques are arrested fermentation, alcohol evaporation, membrane filtration and the use of special yeast. Let us look at them in turn, because each gives a different result.
Method 1: arrested fermentation
The simplest biological method is arrested, that is controlled, fermentation. It works by fermenting the beer like a normal one, but stopping the process before it reaches its normal, alcohol-producing conclusion. Specifically, the yeast is removed or inactivated before it produces much alcohol, most often by rapidly cooling the fermenting beer. Maintaining a low temperature, usually no higher than around fifteen degrees, gives the brewer control over how much alcohol forms. The earlier we stop fermentation, the less alcohol, but also the less developed the flavour, because the yeast did not finish its work. It is a compromise: you have to find the moment when some flavour has already formed but not yet too much alcohol. Arrested fermentation can be relatively cheap, but its drawback is often a sweeter, less developed profile, because some of the sugars did not have time to ferment.
Method 2: evaporating the alcohol
The most common physical method is evaporating the alcohol with heat. It uses a simple fact: alcohol has a lower boiling point than water, so it can be boiled off from beer. The problem is that ordinary boiling would destroy the beer delicate aromas. That is why vacuum distillation is used: by lowering the pressure, the boiling point of alcohol can be brought down from about seventy-eight degrees to roughly thirty-four. Thanks to this the alcohol evaporates at a much lower temperature, and the beer is not exposed to heat that would kill its flavour. This allows the alcohol to be removed while keeping plenty of aroma. The method is effective and popular, though it needs specialised equipment. Its advantage is that it starts from a full, completely fermented beer, so the flavour is more developed than with arrested fermentation. Gentle evaporation is today one of the pillars of a good non-alcoholic category.
Method 3: membrane filtration
The second physical method is even subtler and uses no heat at all. Membrane filtration uses very fine membranes that separate the alcohol molecules from the other components dissolved in the beer. Instead of boiling, the beer is passed through these filters under pressure, and they hold back the flavour and aroma while letting the alcohol and water through. Because pressure is used rather than heat, the membrane method can give a full, preserved non-alcoholic beer of rich flavour. It is often the gentlest way of removing alcohol for the aroma, because nothing is heated. The drawback is the complexity and cost of the equipment. Even so, many producers value this method precisely because it best protects the original character of the beer. Membrane filtration is one of the reasons today non-alcoholic beers can taste so close to their alcoholic originals.
Method 4: special yeast
The newest and most elegant biological route is the use of special yeast. There are strains of yeast that ferment malt sugars only partly or produce very little alcohol, yet still develop plenty of flavour and aroma. Such yeast eats only some of the sugars, leaving the rest untouched, so a minimal amount of alcohol forms but a full, beery profile remains. This approach is attractive because it requires neither stopping fermentation halfway nor removing alcohol after the fact - the beer simply ferments toward a low alcohol content from the start. The development of such yeast is one of the main reasons the quality of non-alcoholic beer has jumped so much in recent years. It shows how much beer yeast matters to the flavour of every beer, not only the non-alcoholic kind. The science of yeast drives the whole category today.
Why it tastes better today
Now that we know the methods, it is easy to understand why non-alcoholic beer has improved so much. In the past cheap arrested fermentation dominated, giving bland, sweetish, underdeveloped beers - hence the category bad reputation. Today producers combine advanced methods: gentle vacuum evaporation, membrane filtration and modern yeast, often supplemented with extra hopping for aroma. The result is beers that keep plenty of original flavour, body and bitterness while having only trace amounts of alcohol. Rising demand meant huge resources were invested in developing these technologies, which raised the bar for the whole industry. That is why today non-alcoholic beer is an entirely different product than a decade ago. Technological progress and competition did their work, turning a compromise of necessity into a genuinely tasty alternative for everyone.
When it is worth reaching for
Non-alcoholic beer today has plenty of sensible uses, not only for non-drinkers. It works when you are driving, when you want a beery taste in the middle of a workday, when you are cutting alcohol or calories, because non-alcoholic usually has fewer, which ties into the topic of calories in beer. A good non-alcoholic beer gives the whole experience of beer - the taste, the bitterness, the refreshment, the ritual - without the effects of alcohol. It is also a way to enjoy beery company without giving up the drink. It is worth treating it not as an inferior substitute, but as a full choice for occasions when alcohol is not advisable or you simply do not feel like it. With rising quality this category stops being a compromise and becomes a conscious, tasty option for everyone.
The essentials in brief
Let us gather it up. Alcohol in beer forms when yeast ferments sugars, and the flavour is born in the same process, so making a good non-alcoholic beer is a challenge. There are two routes: biological (prevent the alcohol from forming) and physical (remove it after the fact). The four main methods are arrested fermentation, vacuum evaporation, membrane filtration and special yeast. Old, bland beers were made mostly by cheap arrested fermentation, while today tasty ones combine advanced techniques and modern yeast. That is why the quality has jumped so much. Non-alcoholic beer makes sense behind the wheel, at work, when cutting alcohol or calories, and is no longer an inferior substitute but a full choice. Now, reaching for such a bottle, you will know how much clever technology stands behind it.
You can note every non-alcoholic beer in GustoNote - the brand, style and impressions. Over time you will see which ones, made by which method, you like best, and choose your favourite non-alcoholic sure bet without hesitation.