Are Sulfites in Wine Bad for You?

The Short Answer:
Are sulfites in wine bad for you? 

While there is little doubt wine without sulfites are of great benefit to those with a pre-existing condition, for the rest of us, sulfites found in wine really shouldn’t raise much concern.

Are Sulfites in wine bad for you?

Common preservatives found in wine, better known as sulfites, have the potential to cause hangover-like symptoms in some asthmatics and those with an intolerance, even when drinking relatively small amounts.

While it’s thought this only affects a small percentage of the general public (less than 1%) there are many who are becoming increasingly skeptical about the use of sulfites in general due to the perceived health implications. 

Side Effects of Sulfites in Wine

While there are a number of preservatives that should be more closely scrutinized, for instance, Sodium Benzoate, sulfites used in wine are considered safe for the majority of people.

For those who do have an adverse reaction to sulfites, sulfite free wine is one available alternative but many consumers have questions, including:

  • How is wine made without sulfites?
  • What is the shelf life of these products?
  • Does it taste as appealing as wine that does contain sulfites?
  • Where can wines free of sulfites be purchased and how much do they cost?

In the following article, we will tackle these commonly asked questions and provide an insight into why sulfites are used in wines and why a small percentage of people may be affected by them.

Why Wines Require Sulfites?

You may not be aware, but sulfites are produced naturally by the body at a rate of approx. 1000 milligrams per day. Sulfites are also naturally occurring in wine, thanks to yeast fermentation which produces sulfites as a by-product. In essence, this means that there are no wines that are truly preservative free but, like any food or drink additive it’s the amount added by artificial means that raises concerns with consumers.

Sulfites are added to wine to kill unwanted bacteria and yeasts during the process of winemaking. Grapes come into contact with a range of micro-organisms as they are grown and then again during harvest. Wine growers face a number of threats to their harvest such as disease, mold, insects, and birds that can damage the fruit during growth. During harvest, grapes may also suffer damage which allows micro-organisms a path of entry.

The wine making process itself exacerbates this problem thanks to the bacteria friendly conditions created, primarily temperature. To prevent wine from suffering bacterial spoilage, sulfites are added. Typically wine contains approx. 150 ppm (parts per million) of sulfur. By way of comparison, dried fruits often contain upwards of 1000 ppm.

Which Sulfites are Used in Winemaking?

The main sulfites added to wines are sulphur dioxide, otherwise known as preservative 220 and potassium metabisulphite (preservative 224).

It’s long been known that these preservatives are responsible for respiratory issues and headaches in a small percentage of the population. But it must be said, we really are talking a small number here e.g. 1%. This includes a percentage of people who suffer from asthma and those who lack a specific enzyme required for breaking down sulfites to sulfates (sulfite oxidase).

Dried fruit typically contains more sulfites than red wine. If you can consume dried apricots without any negative health impacts, then sulfites contained in wine are unlikely to affect you.

How Wine is Manufactured Without Added Sulfites

To make wine free of added sulfites requires a more holistic approach than usual and typically does not lend itself to mass production, relying more on good practice to avoid the fruit becoming susceptible to micro-organisms. 

wine grapes before harvest

In most cases this means harvesting by hand to avoid damaging the fruit, ensuring the winery itself is not a breeding ground for bacteria by maintaining a sanitized environment and also reducing the amount of oxygen in the wine barrels used for storage to reduce the opportunity for oxidation.

It’s also beneficial to store wine in cooler than standard conditions e.g. below 60 degrees, as temperatures above 60 are considered ideal for bacterial growth.

How Long Does Sulfite Free Wine Last?

It’s difficult to compare all wines free of sulfites in regard to aging and as such a timeline cannot really be applied across the board. Like all wines, the storage conditions e.g humidity and temperature will play a major role in preserving wine. If you don’t mind keeping your wine chilled (60 degrees or less), this will extend the shelf life considerably. In fact, some growers will only release their preservative free ranges in winter to combat the problems caused by temperature. In most cases, however, it is recommended that wine that does not have added sulfites is to be enjoyed and not stored in the same way as standard red wine.

Does Sulfite Free Wine Taste as Good as Normal Wine?

In a word yes.

Many organic winemakers have argued that preservatives actually inhibit the natural richness and flavor of wine, especially in the case of red wine. It should also be noted that sulfur dioxide does tend to have its own unique and unpleasant taste, especially if used heavily, (as it sometimes is). Large amounts of sulfur dioxide can influence the taste of wine more than most people are probably aware.

Where to Buy and How Much to Pay

Sulfite free wines are becoming increasingly popular as distrust in modern food and drink production increases.

Thanks largely to the internet we are learning more and more about harmful additives and their potential health implications.


Because of this, otherwise harmless additives such as sulfites are swept along for the ride despite being considered harmless for the majority of people.

You will find a decent selection in most larger alcohol outlets. If you prefer to buy online, there are also a growing number of online retailers that sell organic wines free of preservatives such as the organic wine company, and

In most cases, wines with no added preservatives can be more expensive due to the process required to prevent oxidation and bacterial spoilage. However, it’s not simply a case of comparing wines for value, as all wines differ in some ways. You are however less likely to find budget wines free of added preservatives.

Do Sulfites in Wine Cause Hangover?

Only a small percentage of the population are thought to be impacted by Sulfites in wine which typically manifest displays as asthmatic type symptoms and less like your typical hangover. In most cases those same people would likely have a more severe reaction if consuming dried fruits containing sulfites. The most likely culprit when it comes to your hangover is dehydration so make sure you get plenty of H2o on board.

Preservatives in wine Infographic

How to remove Sulfites from wine

Despite the fact that Sulfites are unlikely to be responsible for your hangover or be the cause of allergic reaction in 99% of people, a number of products have been produced to lower the amount of sulfites in wine. 


While there is little doubt sulfite free wine is of great benefit to those with a pre-existing condition, for the rest of us, the common preservatives found in wine really shouldn’t raise much concern, despite what you may have heard. Don’t buy into the argument that wine that doesn’t contain sulfites means you won’t get a hangover, while it may sound nice in theory there is little supporting evidence to support this claim.

Another point to consider is the fact that if a food or drink product doesn’t use sulfites to prevent bacteria it is potentially more likely to have a reliance on pesticides during production to reduce the pathogens that preservatives such as sulfites protect wine and food products against. If this is of concern to you, we recommend instead taking a closer look at organic wines which are free of added preservatives.

Are Sulfites in wine bad for you? [The Truth about Preservative Free Wine]Are Sulfites in wine bad for you and your health? Learn why Sulfites are used in winemaking, what harm if any they may cause and where to find them.

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