Originally posted by: IGBT
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Acetaldehyde may have varying effects on individuals but it doesn't play favorites; it's as toxic to social drinkers as it is binge drinkers or alcoholics. According to the American Liver Foundation, even moderate drinkers can contract alcoholic hepatitis. The fact is alcohol in any quantity is poison (where do you think the expression, 'Name your poison' came from?). Biologically, hangovers are the initial, painful symptoms of the body's struggle to process (metabolize) this poison and flush it out. Alcohol is initially absorbed in the stomach. Since it can't be stored it must be metabolized, or oxidized, by special enzymes in the liver before it can be expelled from the body.
Yet as the liver converts acetaldehyde into acetic acid it reaches a saturation point, and some of the acetaldehyde escapes into the bloodstream, inhibiting normal mitochondria function and reaction, causing membrane damage, stimulating the synthesis of collagen to form scar tissue, and causing nasty hangover symptoms such as increased heart rate, headache, and nausea.