Evidence supporting the use of: Alcohol
For the health condition: Hangover

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Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Alcohol—specifically the practice known as "hair of the dog" (drinking more alcohol to treat a hangover)—is a traditional remedy rather than one supported by scientific evidence. Historically, this method is rooted in the belief that consuming more alcohol can alleviate hangover symptoms, a concept that dates back centuries. The phrase "hair of the dog that bit you" comes from old folk medicine in which the literal hair of a dog that had bitten someone was thought to be a cure for rabies. By analogy, some believed that a small dose of what caused the problem (alcohol) could cure its aftereffects.

However, scientific studies do not support the use of alcohol to treat hangovers. Hangovers are primarily caused by a combination of factors, including dehydration, electrolyte imbalance, congeners (chemical byproducts of alcohol fermentation), and the toxic effects of acetaldehyde (an alcohol metabolite). Drinking more alcohol may temporarily mask symptoms through further intoxication, but it ultimately delays the body's recovery by prolonging the breakdown of toxic byproducts and potentially worsening dehydration. Medical and pharmacological sources generally warn against using alcohol to treat hangovers, as it does not address the underlying causes and may increase the risk of developing alcohol dependence.

In summary, while the use of alcohol for hangover relief is supported by tradition and cultural practice, there is little to no scientific evidence backing its effectiveness, and it is not recommended as a remedy.

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