How Long Does Beer, The Beverage from Cereal Grain, Stay in my System?

Beer is the oldest alcoholic beverage, commonly used by people after water and tea.  It is made from brewing and fermentation of starches of grains.  It is mainly derived from wheat, barley and rice. Flavors of herbs and fruits are added to this to make the aromatic beer.

Main Ingredients of Beer

The main basic ingredient of beer is water.  Different regions of the world contain different minerals in water and this water when used to make beer produces a particular taste of beer, eventually making regional character visible in the drink.


The flavor and strength of the beer is derived from its starch.  Malted grain is the most common source of starch.  Grain is soaked in water for germination, and then it has to be dried completely.  They produce enzymes that facilitate the conversion of starch into fermentable sugars.  The color of the beer varies according and is often dependent on the different roasting time of malt in different temperatures.  Darker beers come from darker malts.
Another important factor responsible for fermentation is yeast.  It ferments the liquid and influences the flavor and character.
The alcohol content of beer ranges from 3-30%.  Alcohol is the byproduct during the fermentation of yeast.  The alcohol content reduces when the temperature is low and fermentation is less.

Effect of Beer Intake on Health

Moderate consumption of beer decreases the risk of heart problem.  But the regular use of alcohol may result in liver disease and cancer.  Low alcohol content beer fights against cancer.  Lack of exercise and over consumption of beer cause ‘beer belly’.  As it contains significant quantity of nutrients in it, it takes time for the system to metabolize beer.

How Long Does Beer Stay in My System?

How long does beer stay in my system depends upon the quantity drank and number of times the drink is consumed.
Normally people metabolize ½ ounce of alcohol per hour [that is one standard drink].  If we drink three standard drinks, it nearly would take us 3 hours to free from alcohol.  The liver can only metabolize one standard drink in an hour.  If we drink large quantities of alcohol quickly it often proves to be toxic to the blood stream since it takes longer time for the liver to metabolize it.  Other factors on which How long does beer stay in my system depends upon the age, mass of the body, tolerance level, and metabolic rate of the individual.

28 Responses to “How Long Does Beer, The Beverage from Cereal Grain, Stay in my System?”

  1. malone timms on March 8th, 2009 at 12:44 am

    i used to drink beer a lot last year 2008, and this year since january i stopped just like that and i don`t even crave for it.
    but my question is, i have been asked to go and have a test of alchol in order for me to aaply for a new drivers licence. so for how long or how could they know my misuse of alcohol for the whole year, what method will they use to detect the use of alcohol for a year?



  2. sarah on March 10th, 2009 at 7:33 pm

    how long does beer stay in your body? say i drink 3 beers on satyrday,and these are 16 oz and 1 12oz on sunday how long will it stay in the human body weighing 134 pounds?


  3. MrTox on March 11th, 2009 at 6:26 am

    Hair drug tests can be dangerous since you had been drinking lots. A blood test may not detect the alcohol in your system since that would have been flushed out of your blood. Urine test may not. But wait for some more time. Opt for a detox then go for the test and you can pass drug test


  4. Donna on March 14th, 2009 at 3:21 am

    Thank you for all the info you have provided. I am going for a new job and they are going to send me for a drug test. I have a prescription for 2mg three times a day. I only take one in the morning. I know this seems like a large dose so one in the morning is fine. I was having a bad day, I was involved in a car accident and I took 3 in the am and 3 more at night. That was wed. I want to be sure I pass the drug test. Can you give me your expert opinion? Thank you so much. By the way, I am never taking xanax again.



  5. MrTox on March 14th, 2009 at 12:19 pm

    Considering that you are not overweight, I would say that your liver would metabolize one standard drink in one hour. One standard drink is half ounce. For the quantity that you have mentioned and considering the fact that your metabolism is average, 16ox would take a minimum of 32 hours to get metabolized. To be safe, wait for the next few days and then take the test to test negative


  6. MrTox on March 14th, 2009 at 2:38 pm

    When is the drug test going to be? Try to postpone the same as long as possible. You can pass the test. Ensure that you have a 2 week timeframe in-between your intake and your drug test


  7. catherine on September 1st, 2009 at 1:26 am



  8. marion patterson on October 29th, 2009 at 7:42 am

    how long will it take to get alcohol out of your system if you
    blow 1.57 on a breathalizer.


  9. sly on November 4th, 2009 at 9:37 pm

    if i drink beer from friday and saterday on those days maybe i drank more than 8 beers a day will that affect results of alcohol testing on monday morning
    (on sunday i don’t drink nothing except water )


  10. jason on February 4th, 2010 at 6:40 am

    if i took about 7 shots of whiskee at 9:30 wedneay night and have a uine test tomoro at 4:30 and i constantly drin water will i b clean before that time? i needthis asap plllleeeeaaassseeee


  11. bruce on April 19th, 2010 at 3:32 pm

    Need ASAP!!!!!!!!!!

    Need ASAP!!!!!!!!!!

    I am 52yrs old – 160lb male-

    I had 8 shots ( 1.5oz) of whiskey on Monday

    Then I had 3 six packs of beer (Light) during the following weekend (3 days)- how long will it take for the BAC to go to 0 – I have a Urine and a BreathAlyzer Test Coming up soon and I need to be at 0%

    Whiskey = 12 ozs
    Beer = 18 ozs ( 1 oz Alcohol per 12 oz beer – )

    so lets say that is 30 ozs of alcohol in 168 hrs –



  12. steph on May 22nd, 2010 at 10:05 am

    if i drank a naggin and i have to get a blood test in two days time, would the alcohol be definately out of my system?


  13. Kasper Alkomteter on June 9th, 2010 at 8:32 pm

    You metabolize a drink every 1 to 1½ hour. So there is absolutely no chance that you will have alcohol in your system.


  14. brenda whitfield on July 2nd, 2010 at 2:23 am



  15. LINDA MASON on July 2nd, 2010 at 2:26 am



  16. Alkometer on October 16th, 2010 at 9:36 am

    @Brenda and Linda

    If you are a woman it will probably be 2 hours before one beer is metabolized.

    You schouldn’t worry about af couple of beers if the test is the next morning.


  17. Alkometer on October 16th, 2010 at 9:39 am

    @Brenda and Linda

    In your case you will not have alcohol in your body after 4 hours:-)


  18. stephanie on November 12th, 2010 at 7:45 pm

    I’m 35 yrs old. 115 lbs. I will have a alcohol urine test on Monday. I want to drink a few beers tonit (Friday) can I have at least a six pack and still be safe? I hav been drinkin for at least the past 4 yearsat least a 12 pack everyday. I’ve been quit now for only 2 weeks. How will a 6 pack register come Monday?


  19. Alkoholtester on December 2nd, 2010 at 9:39 pm

    Alcohol stay in your system for about an hour. In some cases it stays 2 hours.


  20. mandy on January 9th, 2011 at 12:27 am

    I had 1 bloody mary about 3 hours ago. I just got called in for a random drug/alcohol screeen. Is it still in my system?


  21. ejay on March 6th, 2011 at 10:58 pm

    Just wanted to ask I would like to drink me 32oz Miller with some budds of mine, but I have a test for work on Friday afternoon and i normally do not drink. I am 40 years old and am approm 5ft 7in about 155 to 160 pounds give or take a few…would I be alright to do this and still pass a urine test..thanks in advance..


  22. merha on April 15th, 2011 at 1:01 am

    i was drink 1 beer around 8:30pm and i have a drug test for tomorrow around 12:30am is that bud for the result.


  23. George on April 15th, 2011 at 8:31 pm

    if i drank a total of 48ozs of beer finishing my last drink of it at 5pm thursday, then take a ua at 10:45am friday would it be a clean test.


  24. Dejohn on August 2nd, 2011 at 4:34 pm

    Lets say i drank 4 mix drinks and three 12oz beers go to sleep at 1200 wake up @ 630 drink three to 5 12 ounce beers and get a blood test and piss test @ 1200 will it be detected..


  25. sylvia grey on March 29th, 2012 at 6:37 pm

    I have lost my drivers license in 2010, due to bad blood work reportsy monthly….Actually I lost due to a medical issue and they said it was alcohol withdrawal????? I am wanting to try again and need some info if any is ok or not. Having a difficult time in life right and the alcohol seems like the big thing to stop. Have been to re-hab and A.A meetings in the past and I guess that has not helped me either….If you could give me any thoughts on this I would really appreciate it thks.


  26. rj on May 31st, 2012 at 9:48 pm

    if i drank 12 beers, how long would it take to metabolize from my urine and my blood?


  27. Freaking Out on May 30th, 2014 at 8:54 pm

    I recently got a DWI. I have to go to ASAP. I did not know that I would have to be urine tested (was told it would be breath test). Long story short, I drank 12 Busch 12oz beers. I stopped drinking at 7pm the day before. I drank water & ginger ale for the remainder of the evening. I had approximately 16oz of water when I first woke, and drank another 12 ginger ale. I had 3 16oz Monsters. I am on 37.5mg phentermine for weight loss, so my metabolism runs high. I had my urine taken at 2pm (19 hrs after I had stopped drinking). Does anyone know if I have any chance of passing? Or at least a low amount of alcohol result? I have not stared the classes yet, this was the first meeting with my consoler. I am terrified of the results. This is the first time I have ever been in trouble. And do not know what to expect, or who I can talk to for answers. BTW. I am male, 220lbs, and 44yrs old.


  28. Kristy on August 12th, 2015 at 2:37 am

    If I drink one 24ounce can of beer now on tuesday noght at 940 pm will it all be out of my system by a 4 pm drug test the next day on Wednesday?


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