Why do we have different readings yet we have had the same amount to drink?

It is in fact more likely than not for two people who have consumed the same amount of alcohol, in the same amount of time, to have two different readings. BAC content is affected by gender, weight, age, metabolism, food and liquid consumption (to name a few). Results will also change from one day to the next with the same individual. This is why it is so important to have a breathalyser to test yourself. No breathalyser = no certainty.

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