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Recently, I ran an article claiming that science now shows that the old notion that everyone should drink at least 8 glasses of water per day was false.  The article cites a 1945 Food and Nutrition Board recommendation that stated we should drink 2.5 liters of water per day.  However, the article claims the recommendation is misread and science is clear.  What is the truth?

Benefits of Water

Before we discuss the legitimacy (or lack thereof) of this claim, I want to cover why water is important.  For starters, roughly 60% of your body is made up of water.  This means that your body requires water to function properly, in all areas (digestive, immune, etc.).

What happens if you drink too much water?  Your brain signals your kidneys how much water to excrete as urine or how much to keep.  So, let’s dive into those health benefits without fear.


Water helps increase your energy levels.  A study has shown that a 1-3% loss in fluid can impair your brain function and leave you feeling fatigued.

2. Weight Loss

Water can help you lose weight.  Studies show a correlation between water intake and pounds shed.  Why is this?  First, if you drink water, hopefully you are not consuming as many calorie-rich drinks, so it reduces the number of calories you consume.  Second, water can actually make you feel more full.  No, I am not going to cite any studies on this, but personal experience can attest to this.  Give it a try :).

3. Detox and Clear Skin

Finally, drinking more water helps you detox and therefore leads to healthier skin.  Drinking water helps flush out toxins.  That is why, here at Fast Fit, we strongly recommend consuming a lot of water during our program.  But there is another benefit to flushing out toxins.  Certain toxins inflame the skin.  Thus, when you remove these certain toxins, your skin can look healthier.  Therefore, drinking water does help make your skin look better.

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Was the article truthful?

Having discussed the benefits, I want to address the notion about whether you should drink 8 glasses of water per day.

Was the article right?  Yes.  In fact, of all the people who live, there is not one certain recommendation that will work for all of us in consuming water.  Each of us is different.  How much water you drink depends on your size, your activity, health, and other factors.

So how much water should you drink?

Enough.  And how much is enough?

I don’t know. You’ll leave it to your body to tell you.

What we will tell you is that drinking at least 8 glasses per day will not hurt you.  You can thank your brain and kidneys for that.