How is it that you can lose weight while you sleep?

Digestion of food and absorption of nutrients maybe?

Absolutely. 2-3 lbs is normal. If you weigh in after a morning workout (assuming you haven't drank a gallon of water) you'll weigh even less.

Cut out carbs entirely (I know, frick that) and run 2.5 miles before bedtime ... You can lose even more while sleeping... Up to 5 lbs.

The same way that your car burns gasoline while idling, your body burns calories while sleeping just to keep itself alive. That, and getting up once or twice in the middle of the night to piss. To really track it properly, you have to weigh yourself at the same time every day, preferably first thing in the morning. I weigh myself daily and write it in a log. I may bump up a pound every now and again due to sodium and water retention, but as long as the TREND is downward, I'm good.

well assuming you don't die in your sleep your body's metabolism is active and you burn calories. if you've been exercising your metabolism is more active.

Maybe you're sleep-pooping. Do you Ambien?

Before you go to bed at night, use a Sharpie and mark your toilet paper roll.

When you get up in the morning, see if your toilet paper roll still has a mark on it.

If it doesn't, you're sleep-pooping.

Water weighs 8.33 lbs per gallon. So a 16 oz bottle is about a pound. That'll give you a decent idea on how much your weight can fluctuate.

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I get that, but 2-3 pounds?

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I know a woman's weight can fluctuate during menstration due to water rentention/etc by almost 6-7 pounds. As others have said, it's anything from absorbtion to sweating. You also have to account for meds you're taking or supplements that maybe dehydrate.

I will say it's not good to weigh yourself every day like that because of those daily fluctuations. You're better off weighing once a week at the same day at around the same time.

Making heat in the covers bro