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How long does a glass of wine stay in the system?

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A single glass of wine remains in the bloodstream for approximately 3 hours. This can vary depending on a few factors such as weight and sex.

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Full Answer

The amount of time alcohol stays in the blood stream is dependent on many factors. The main factor is how many units are consumed. A glass of wine has about 3 units while a beer has about 2. It takes an hour for the alcohol in a unit to break down. Any medications being taken can cause the alcohol to break down more slowly. Also, the alcohol usually lasts longer in a smaller person's body.

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