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Hangovers: Causes, Prevention, and the Role of B Vitamins
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Published December 27, 2023, at 16:21:44 PST. Updated December 27,2025,at 16:21:44 PST.
Understanding What Causes a Hangover
Hangovers are the result of alcohol’s many effects on the body. They are not simply caused by dehydration, though that is a significant contributing factor. A complex interplay of physiological processes leads to the constellation of symptoms – headache, nausea, fatigue, and cognitive impairment - that characterize a hangover.
Several factors influence the severity of a hangover. These include the amount of alcohol consumed, the type of alcohol, individual physiology, and even genetics. Alcohol disrupts sleep patterns, increases inflammation, and can irritate the stomach lining.
Interestingly, the type of alcohol consumed plays a role. Beverages containing higher levels of congeners – byproducts of the fermentation process – are associated with more severe hangovers. Research published in Alcohol Research indicates that darker liquors like brandy, whiskey, and red wine generally contain more congeners than lighter options like vodka or gin. However, even alcohol that doesn’t contain congeners can cause a hangover, and any type of alcohol can cause a hangover.
Preventing Hangovers: What Works (and What Doesn’t)
The only confirmed way to prevent a hangover is to avoid alcohol consumption altogether.If you choose to drink, consuming less alcohol substantially reduces the risk. There’s a common misconception that mixing different types of alcohol leads to worse hangovers; however, the National Institute on Alcohol Abuse and Alcoholism (NIAAA) states that its the total amount of alcohol consumed, not the combination, that’s the primary factor.
Popular remedies like drinking coffee, taking pain relievers, or “hair of the dog” (drinking more alcohol) offer only temporary symptom relief and don’t address the underlying physiological causes. staying hydrated by drinking water before, during, and after alcohol consumption can help mitigate dehydration, but it won’t prevent a hangover entirely.
Does Alcohol Use Affect B Vitamins?
A review published in Nutrients suggests that heavy or binge drinking can interfere with the pathways that allow vitamins to enter your system. In this very way, it can affect how many B vitamins your body can absorb. The review specifically cites vitamins B1 (thiamine), B2 (riboflavin), B7 (biotin), B9 (folate), and B12 (cobalamin)
