Wine Headaches Explained: Are Sulphites to Blame?

It is one of the most common complaints in the world of wine. You enjoy a glass or two, and the next morning, or sometimes within the hour, a headache arrives. For many people the immediate suspect is sulphites, the preservative found in almost all wine. It has become such a widespread assumption that "sulphite headache" is now part of everyday conversation.

But is it actually true? The science tells a more interesting and more nuanced story than the popular myth suggests. This guide explains what really causes wine headaches, what role sulphites do and do not play, and what your options are if wine reliably leaves you feeling worse for wear.

What Are Sulphites, Really?

Sulphites, or more precisely sulfur dioxide and related compounds, are preservatives used in winemaking to prevent oxidation and stop unwanted bacteria and wild yeasts from spoiling the wine. They have been used for centuries and are a standard part of modern winemaking.

Here is the first important fact. Sulphites occur naturally as a byproduct of fermentation, which means virtually all wine contains at least some sulphites, even wines with nothing added. Winemakers then typically add a small additional amount to keep the wine stable and fresh.

A few key facts about sulphites in wine:

• All wine contains sulphites, whether added or naturally occurring

• White and sweet wines generally contain more added sulphites than red wines

• Wine actually contains fewer sulphites than many common foods

• Dried fruit, for example, often contains far more sulphites than wine

• In Australia, wines containing added sulphites above a certain level must be labelled

That last point about dried fruit is worth sitting with. A handful of dried apricots typically contains several times the sulphite concentration of a glass of wine. Yet very few people report getting headaches from dried fruit. This is the first clue that sulphites may not be the main culprit that popular belief assumes.

The Sulphite Headache Myth

The idea that sulphites cause headaches is extremely widespread, but the scientific evidence does not strongly support it.

Sulphites can genuinely cause problems for a small number of people, but those problems are usually respiratory rather than headache-related. Roughly 1% of the population has a genuine sulphite sensitivity, and among people with asthma the figure is somewhat higher. For these individuals, sulphites can trigger breathing difficulties, wheezing, or allergic-type reactions. What sulphites are not well established as causing is the classic wine headache.

If sulphites were the primary cause of wine headaches, we would expect white wine, which contains more added sulphites, to cause more headaches than red wine. In reality, most people who report wine headaches point to red wine as the worst offender. This is a strong indication that something other than sulphites is at work.

So What Actually Causes Wine Headaches?

The honest answer is that wine headaches likely have several causes, and the specific trigger may vary from person to person. Here are the most likely culprits according to current understanding.

Alcohol itself

The most obvious and probably the most significant factor. Alcohol is a diuretic, which means it promotes fluid loss and dehydration, and dehydration is a well-established cause of headaches. Alcohol also dilates blood vessels, which can trigger headaches in some people. For many wine drinkers, the simple truth is that the alcohol is the main problem.

Histamines

Wine, particularly red wine, contains histamines, the same compounds involved in allergic reactions. Some people have a reduced ability to break down histamines, which can lead to headaches, flushing, and congestion. Red wine generally contains more histamines than white, which fits the common pattern of red wine causing more headaches.

Tannins

Tannins, the compounds that give red wine its structure and that drying sensation, may trigger headaches in some sensitive individuals by prompting the release of serotonin. This is another factor that would explain why red wine is more frequently blamed than white.

Tyramine and other compounds

Wine contains various other naturally occurring compounds, including tyramine, which is known to trigger headaches in some people, particularly those prone to migraines.

Sugar and dehydration combined

Sweeter wines combined with alcohol's dehydrating effect can compound the problem, and drinking on an empty stomach makes everything worse.

The likely causes ranked:

Why Red Wine Gets the Worst Reputation

Red wine is far more frequently blamed for headaches than white, and understanding why helps clarify the whole picture.

Red wine is fermented with the grape skins, which is where tannins, histamines, and many other compounds come from. White wine is generally fermented without extended skin contact, so it contains fewer of these compounds. Yet white wine typically contains more added sulphites than red.

This is the clearest evidence available that sulphites are not the main cause of wine headaches. If they were, the wine with more sulphites (white) would cause more headaches, not fewer. The fact that red wine, with its higher tannins and histamines but lower sulphites, is the more common trigger points firmly away from sulphites and toward the compounds found in grape skins.

What Are Your Options If Wine Gives You Headaches?

If you reliably get headaches from wine, there are several practical approaches worth trying before giving up on wine altogether.

Practical steps to reduce wine headaches:

• Drink plenty of water alongside wine to counteract dehydration

• Never drink on an empty stomach

• Stick to moderate quantities and drink slowly

• Try switching from red to white to test whether skin-contact compounds are the issue

• Pay attention to which specific wines cause problems and which do not

• Consider wines made with minimal intervention and fewer additives

That last point leads to one of the most interesting developments in modern wine, the growing category of wines made with fewer additives and more natural production methods.

Preservative free wine is made without added sulphites, relying only on the small amount that occurs naturally during fermentation. For drinkers who suspect added sulphites are a factor, or who simply prefer fewer additives, this category has grown significantly in recent years and now includes genuinely high-quality options across reds, whites, and sparkling wines.

Understanding the Low-Intervention Wine Categories

The wine world has seen a real shift toward wines made with fewer additives and more natural methods. These categories overlap but are not identical, and understanding the differences helps you choose.

Organic wine is made from grapes grown without synthetic pesticides, herbicides, or fertilisers. The farming is certified organic, and the winemaking typically involves fewer additives than conventional wine, though small amounts of sulphites are usually still permitted under organic certification. For drinkers wanting cleaner farming and generally lower additive levels, organic is an excellent and widely available choice.

Biodynamic wine takes organic farming a step further, following a holistic farming philosophy that treats the vineyard as a single living system and works in harmony with natural and lunar cycles. Biodynamic wines are made from grapes grown to these exacting standards, and the approach often results in wines with minimal intervention in the cellar as well.

Natural wine is the broadest and least formally defined category. It generally refers to wine made with minimal intervention, organic or biodynamic grapes, wild fermentation, and little to no added sulphites or other additives. Natural wine aims to express the grape and the place as directly as possible, with as little interference as possible.

Category comparison:

For drinkers who suspect additives contribute to their wine headaches, exploring these categories is a genuinely worthwhile experiment. Many people find that lower-intervention wines sit better with them, though whether that is due to fewer sulphites, fewer other additives, or simply drinking more mindfully is difficult to say for certain.

The Honest Bottom Line

The popular belief that sulphites cause wine headaches is largely a myth. Sulphites cause genuine problems for a small number of people, but those problems are usually respiratory rather than headaches, and the wine with the most sulphites, white wine, is not the wine most commonly blamed for headaches.

The more likely causes are alcohol and dehydration, histamines and tannins from grape skins, and various other naturally occurring compounds. This is why red wine, despite containing fewer added sulphites than white, is the more frequent culprit.

If wine reliably gives you headaches, the most effective steps are to hydrate well, eat before drinking, drink in moderation, and pay attention to which specific wines affect you. Exploring lower-intervention wine categories may also help, and many drinkers find these wines a genuinely enjoyable path regardless of whether they solve the headache question entirely.

Frequently Asked Questions

1. Do sulphites cause wine headaches?

The scientific evidence does not strongly support sulphites as a cause of wine headaches. Sulphites can cause respiratory reactions in a small percentage of people, particularly asthmatics, but they are rarely linked to headaches. The fact that white wine contains more sulphites than red, yet red wine is more commonly blamed for headaches, is strong evidence that sulphites are not the main cause.

2. Why does red wine give me a headache but white wine does not?

Red wine is fermented with grape skins, which contain higher levels of tannins and histamines, both of which are more likely headache triggers than sulphites. White wine is generally made without extended skin contact, so it contains fewer of these compounds despite typically having more added sulphites.

3. Does preservative free wine prevent headaches?

Not necessarily, but it may help some people. Preservative free wine contains no added sulphites, only the small amount produced naturally during fermentation. If added sulphites are a factor for you specifically, these wines may sit better. However, since alcohol and grape-skin compounds are more likely causes, no wine can guarantee a headache-free experience.

4. Are organic and natural wines lower in sulphites?

Generally yes. Organic wines are permitted lower sulphite levels than conventional wines, and natural wines often contain little to no added sulphites at all. Biodynamic wines also tend toward minimal intervention. These categories appeal to drinkers wanting fewer additives, though they still contain naturally occurring sulphites from fermentation.

5. What is the best way to avoid a wine headache?

The most effective steps are drinking plenty of water alongside wine, never drinking on an empty stomach, drinking in moderation and slowly, and paying attention to which specific wines affect you. Since dehydration from alcohol is a leading cause, staying well hydrated is the single most useful thing most people can do.