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How much water is lost with 1 pound of fat?


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I keep reading that 3500 calories is equal to 1 pound of fat but how much total weight do I lose when I lose one pound of fat? How much water goes away with that? Do I make sense? :)

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I'm not sure I understand.  Water weight doesn't necessarily get lost with each pound of fat loss.  Generally speaking, most folks who are not living a healthy lifestyle are a bit dehydrated.  When one doesn't drink enough water, the body hangs on to what it has, which causes a little bloating.  Then when people start hydrating properly, the body says Thank Goodness!  I can dump all this water I've been saving for a rainy day!  So you get some water loss.

One is very likely to lose water weight right after one hydrates, like at the start of their program.  You can also get a little retention if you have a day off your plan, or eat too much salt.  But burning fat by running at a deficit does not cause water loss in and of itself.

water fluctuates constantly, dependent on more factors than i can list (let's start with activity, weather, diet, stress, autoimmune activity, and hormonal cycles). as don't fret over that. just eat well, drink water, and stay active.

well if you want to get really technical...the human body is like 55-60% water....so do your math :)

though really, it depends on so many things and it is really pointless to consider it.

thhq
Jan 02 2011 18:49
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#4  
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When I was busy losing 50 pounds, and counting calories more accurately than I do now, I lost about a pound on the scale every time I accumulated 3500 calories of deficit. I couldn't see it very well within a week's time, but could see it at the end of a month. I don't think it was all fat, but I could see waistline reduction which was mostly fat.

My point is that, i dont think fat loss is equal to weight loss, otherwise how would people lose 10 pounds in 2 weeks or so? I guess u lose some muscle too and water.. Also i am positive that if i really stick to eating 1000 calories and have a 1000 calories deficit a day i'll be losing more than just 2 pounds a week. Wrong?

no, the point is that water comes and goes. yes, on the scale it might appear that you've lost more weight (or less) than your deficit would support, but the water will be back.

anyway, that 1000 deficit is just an estimate. don't get so caught up in the numbers.

Original Post by evil_iri:

My point is that, i dont think fat loss is equal to weight loss, otherwise how would people lose 10 pounds in 2 weeks or so? I guess u lose some muscle too and water.. Also i am positive that if i really stick to eating 1000 calories and have a 1000 calories deficit a day i'll be losing more than just 2 pounds a week. Wrong?

I hope this is just an example, not how you are really eating and the deficit you are trying to attain.  Your body will decrease your metabolism to compensate for not enough food and you will lose even less weight.  Most people do better with a 500-750 cal deficit unless you are very overweight.

#8  
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I searched for "pound of fat calorie calculation" and found the following information at http://www.caloriesperhour.com/tutorial_pound .php.

 

Basically it said that a pound has 454 grams, which would be 4086 calories at 9 calories per gram of fat. 

The 3500 calories per pound of body fat comes from the fact that a pound of fat tissue in your body contains some water in addition to fat, making its calorie count less than 9 per gram.  

 

umm unless you are an elderly person weighing under 100 lbs you really really need to eat more than 1000 calories a day.

Way to go jon!!! Good answer (post #8).

I am surprised that the discrepancy (between the 3500 and the 9 cal/gram thing) doesn't come up more often. If you look up "water content of human fat, the answers are near 15%. That means that fat in your body is only 85% actual fat and that is why you can burn off that pound of human fat by burning only 3500 calories instead of 4086.

The bummer part: eating a pound of pure fat (like a cooking oil that has no water in it), extra, on top of your maintenance calories, would make you gain 1.17 pounds.

OGR

Yup thanks a lot Jon!! thats what i wanted to know.. so all the water and stuff is already included in that pound!!! Cheers!

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