Does Alcohol Count Towards Daily Water Intake?

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In this video I continue on my video series of daily water intake requirements and look at the effect of alcohol on hydration. Although alcohol has a diuretic effect it is not as significant as is usually perceived especially when diluted and when consumed when already dehydrated. If you drink, this is a very useful video to watch to make sure you are properly hydrated! Note though that in this video I deal strictly with hydration and not with the other possible effects of alcohol consumption such as added calories, blood-alcohol levels, and effects on the liver.

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References:

Hobson, R. M. & Maughan, R. J. 2010. Clinical Aspects: Hydration Status and the Diuretic Action of a Small Does of Alcohol. Alcohol & Alcoholism. Volume 45, No. 4. Pages 366-373.
https://1drv.ms/b/s!As32ynv0LoaIiLg13ZLjbB1VLHR_MQ?e=L0O29E

Shirreffs, SM. & Maughan R. J. 1997. Restoration of fluid balance after exercise-induced dehydration: effects of alcohol consumption. Journal of Applied Physiology. Volume 83. Pages 1152-1158.
https://1drv.ms/b/s!As32ynv0LoaIiLgyLH5_nGcwA6iOGA?e=o6XOYR


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Does Alcohol Count Towards Daily Water Intake?

Does Alcohol count towards water intake.jpeg

This video is a follow up video to my earlier videos on “Daily Water Intake” and “Does Coffee/Tea Count Towards Water Intake”(see video description below)

Most of the information in this video is taken from:

Hobson, R. M. & Maughan, R. J. 2010. Clinical Aspects: Hydration Status and the Diuretic Action of a Small Does of Alcohol. Alcohol & Alcoholism. Volume 45, No. 4. Pages 366-373.
https://1drv.ms/b/s!As32ynv0LoaIiLg13ZLjbB1VLHR_MQ?e=L0O29E

Alcohol is viewed as diuretic, meaning it increases urination.

But does this mean 1 cup of alcohol requires that I drink 1 cup of water to counteract the diuretic effects??

The 2010 Study involved 12 males in 4 experiments:

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Figure 1: Total cumulative urine volume produced over the 4-h observation period post-drink ingestion (Modified from Hobson & Maughan, 2010)

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Figure 2: Hourly urine output for the 4-h observation period after drink ingestion (Modified from Hobson & Maughan, 2010)

Results show that alcohol has diuretic effects but it is significantly slowed when dehydrated. In other words if you are dehydrated drinking alcoholic beer will not make you pee more (i.e. diuretic effect is blunted).

Also most of the urine output was during the first hour after drinking on both the alcohol trials.
Shirreffs and Maughan (1997) showed that about an additional 100 mL of urine is produced for each 10 g of alcohol ingested. This corresponds to about 250 mL of 4% alcohol beer. But this is still not diuretic to the point where drinking beer makes you pee more than you drink.

They also concluded that a beverage with less than 2% alcohol had the same effect on hydration as a non-alcohol beverage but a beverage with 4% alcohol did increase relative urine output.

Read more of that study here:

Shirreffs, SM. & Maughan R. J. 1997. Restoration of fluid balance after exercise-induced dehydration: effects of alcohol consumption. Journal of Applied Physiology. Volume 83. Pages 1152-1158.
https://1drv.ms/b/s!As32ynv0LoaIiLgyLH5_nGcwA6iOGA?e=o6XOYR

Conclusions

Thus drinking alcoholic beverage with 4% or more alcohol will make you pee more and should partially count towards your daily water intake.

The dilution of alcohol significantly lowers the diuretic effect and thus can be considered as part of water intake.

Drinking alcohol in beer when already dehydrated has little diuretic effect and can be considered as part of water intake.

This video is strictly based on hydration and does not take into account other aspects of alcohol such as calories, blood-alcohol levels, and effects on the liver in breaking down the alcohol.



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