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Since women are generally smaller than men, the same amount of alcohol will affect women more than men. 

However, even if a man and woman who weigh the same drink the same amount, the alcohol will still affect the woman more. This is because:

  • Women generally have a lower percentage of natural body water than men, so they achieve higher concentrations of alcohol in the blood faster
  • Women have less ADH, the enzyme that breaks down alcohol, and so aren’t as effective at processing alcohol as men

This is why the recommended number of units in most countries is different for men and women. 

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