5 surprising reasons why alcohol affects men and women differently

The same amount of alcohol can have a stronger immediate effect on a woman’s bloodstream (Image: Pexels)

• Women hit higher blood alcohol levels than men with equal drinks.
• Women may experience stronger cognitive impairment from alcohol
• Menstrual cycle has limited effect on alcohol metabolism in women

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Alcohol doesn’t impact everyone the same way. The body absorbs, distributes and removes alcohol through a complex set of processes influenced by sex‑based differences in physiology. According to research from the Alcohol Research & Health journal, moderate drinking can affect men and women differently, sometimes in surprising ways.

According to a PubMed study, scientists reviewed clinical studies showing that physiological differences between sexes influence everything from blood alcohol levels to cognitive performance after drinking. And while social attitudes about alcohol may vary, the underlying science is rooted in biochemistry, body composition and brain sensitivity.

Biology of alcohol: What makes women and men different

Body water content: Women generally have less total body water than men of the same weight. Because alcohol distributes primarily in body water, this means that, after an equivalent drink, women typically reach higher blood alcohol concentrations (BAC) than men. In other words, the same amount of alcohol can have a stronger immediate effect on a woman’s bloodstream.

Also read | Any amount of alcohol is bad and there is no safe limit for heart, liver or brain health, warns new study

Absorption and first‑pass metabolism: Once alcohol enters the stomach and small intestine, some of it is metabolised before ever reaching the bloodstream, a process called first‑pass metabolism. While initial studies suggested that women might metabolise more alcohol in the stomach, later data found that differences in first‑pass metabolism between sexes are small and inconsistent.

Elimination rates and liver activity: Women often remove alcohol faster than men per unit of lean body mass. This may suggest that women sober up quicker, yet because their peak BAC is usually higher, the experience of alcohol’s effects can still be more intense.

Cognitive and functional sensitivity: Research shows that women may be more vulnerable to alcohol‑related impairment in specific cognitive tasks, such as memory or divided attention, even when accounting for similar BAC levels. That means performance skills like multitasking or recalling information can be affected differently in women than in men after a few drinks.

Also read | Why over-drinking alcohol is more dangerous for your organs than you think

Menstrual cycle and hormones: Although some scientists have speculated that variations in female sex hormones might change how alcohol is processed, studies suggest that the menstrual cycle has limited influence on alcohol metabolism.

Disclaimer: This article, including health and fitness advice, only provides generic information. Don’t treat it as a substitute for qualified medical opinion. Always consult a specialist for specific health diagnosis.