Alcohol typically takes about 4 to 5 hours for the body to metabolize half of the alcohol consumed (half-life), and it generally takes around 25 hours for the body to eliminate alcohol completely. However, detection times vary depending on the testing method and individual factors. Here are approximate detection windows for alcohol in the body:

• Blood: Up to 12 hours
• Breath: 12 to 24 hours
• Urine: 12 to 24 hours, but up to 72 hours or more after heavy use
• Saliva: Up to 12 hours
• Hair: Up to 90 days

The exact time depends on factors like genetics, age, weight, liver health, amount consumed, and whether food was eaten. The liver metabolizes alcohol at roughly one standard drink per hour, but this rate can vary among individuals. The only way to clear alcohol from the body is to allow time for metabolism by the liver; no quick methods like drinking coffee or eating food can significantly speed this process.