Alcohol Server · Alcohol and the Body

Why can two people who drink the same amount of alcohol have different levels of impairment?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

Differences in body weight, sex, food intake, tolerance, and other factors affect how alcohol impairs each person

A Only the drink brand matters
B Impairment is random
C Differences in body weight, sex, food intake, tolerance, and other factors affect how alcohol impairs each person
D They cannot differ

Why this is the answer

Two people who drink the same amount can have different impairment levels because of individual factors — body weight, biological sex, whether and what they have eaten, hydration, fatigue, medications, and even differences in how their bodies process alcohol. A larger person who has eaten will generally reach a lower BAC than a smaller person drinking on an empty stomach. This variability is why servers should base intoxication judgments on observed signs in each individual rather than assuming a fixed number of drinks affects everyone the same way.

Source: Responsible Beverage Service — Individual Differences

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About this topic: Alcohol and the Body

Alcohol-and-the-body questions cover absorption, blood alcohol concentration, the factors that change it (weight, food, sex, medication) and the myths about sobering up. Understanding the physiology is what lets a server judge intoxication rather than guess. This is one of 9 Seller-Server questions on alcohol and the body, each with a full explanation on a single study page.

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Why can two people who drink the same amount of alcohol have different levels of impairment?

Why this is the answer

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About this topic: Alcohol and the Body

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