Do sulfites cause headaches?
Quick answer
Contrary to popular belief, sulfites are probably not the main cause of wine headaches. Scientific studies point more toward histamine, tannins, and acetaldehyde. Sulfites mainly trigger respiratory reactions in sensitive individuals (about 1% of the population).
Detailed answer
The idea that sulfites cause headaches is one of the most persistent wine myths. While sulfites can trigger adverse reactions, these are mainly respiratory (bronchoconstriction in asthmatics), not headache-related.
A study in the Journal of Headache and Pain (Wantke et al., 2000) showed that administering sulfites at doses higher than those found in wine did not provoke headaches in healthy subjects. Dried fruits, for instance, contain up to 3,000 mg/kg of sulfites — 10-20 times more than wine — without triggering mass headaches.
The real culprits behind wine headaches are more likely: histamine (a vasodilator found mainly in red wine), biogenic amines (tyramine, phenylethylamine), tannins (which stimulate serotonin release), and acetaldehyde (a toxic ethanol metabolite).
Dehydration should not be underestimated either. Alcohol is a diuretic — each glass of wine increases water loss. Dehydration is a well-documented headache trigger.
If you regularly get headaches after drinking wine, try drinking a full glass of water between each glass of wine, favour dry whites over reds, and limit your intake. If symptoms persist, see a doctor to explore a possible histamine intolerance.
The real causes of wine headaches
- Histamine: vasodilator found 3-4 times more in red wine than in white
- Tannins: stimulate serotonin release, whose fluctuations trigger migraines
- Acetaldehyde: toxic ethanol metabolite, present at higher levels in red wine
- Dehydration: alcohol is a diuretic, and water loss triggers headaches
- Biogenic amines: tyramine and phenylethylamine found in barrel-fermented wines