Science and Medicine

Blood alcohol content

Blood alcohol content (BAC), also known as blood alcohol concentration or blood alcohol level, is the concentration of alcohol in a person's blood, measured for legal or medical purposes. BAC is expressed as the mass of alcohol per unit volume of blood. In the United States and many other countries, it is commonly reported as a percentage, such as 0.08% (equivalent to 0.8 g/L). Legal limits for driving vary by country, ranging from zero tolerance policies to 0.08%. Levels above 0.40% (4 g/L) may be fatal.

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• ▸Epsilon Draconis
• ▸Cuthbert Christy

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