Wine Hangover Causes
A wine headache results from the body’s response to the alcohol and other contents of the wine. Red wine contains histamines, which are found in the skin of a grape. This is one reason why white wine is less likely to give a person trouble.
Histamines trigger responses in your body such as signals to the brain and the release of stomach acid. When the body builds up too much of this chemical, it results in a headache. This is also known as histamine intolerance.
The tannins found in grape skins communicate to your brain that it needs to release serotonin. Some people are sensitive to this and experience headaches.
Another suspect for a wine hangover is sulfates. These are found naturally in wine and help to preserve it. Sulfates are also common in pickles, raisins, and soy sauce.
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