There is no proven way to "sober up fast." Your liver eliminates alcohol at a fixed rate of about 0.015% BAC per hour using the enzyme alcohol dehydrogenase, and nothing you do — coffee, energy drinks, cold showers, exercise, vomiting, or "sweating it out" — measurably accelerates that process. The most common myths debunked: (1) Coffee makes you a wide-awake drunk, not a sober one; caffeine masks fatigue but does not lower BAC. (2) Cold showers raise alertness briefly but do not change blood-alcohol concentration. (3) Greasy food eaten after drinking does not absorb alcohol that is already in your bloodstream — only food eaten before or while drinking slows absorption. (4) Exercise burns calories, not ethanol; sweating eliminates less than 5% of total alcohol. What actually works: time, hydration with water and electrolytes (which improves how you feel even if BAC is unchanged), and avoiding additional alcohol. If you need to be sober for driving or work, calculate when your BAC will return to zero using the AlcoInsights Time to Sober calculator. Sources: NIAAA, Jones (2010), CDC Frequently Asked Questions about Alcohol.