How many calories does a standard whole blood donation burn?

Submitted ⁨⁨1⁩ ⁨year⁩ ago⁩ by ⁨Fosheze@lemmy.world⁩ to ⁨[deleted]⁩

So if just went and donated blood again and durring the recovery period it occured to me that it takes quite a bit of work for your body to regenerate that lost blood volume and the actual blood cells. Regrowing that many cells seems like it would be fairly energetically intensive. So how many calories does producing all those new blood cells actually consume? Is there even a way to know that?

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carl_dungeon@lemmy.world ⁨1⁩ ⁨year⁩ ago
Oh man, instead of my daily workout, I could just donate daily! After a few months, I’d be a blood making machine!

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- variants@possumpat.io ⁨1⁩ ⁨year⁩ ago
  But once your body gets used to pumping out so much extra blood, if you skip donate day you will plump up and explode
  
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  - carl_dungeon@lemmy.world ⁨1⁩ ⁨year⁩ ago
    Nah man, I’ll look vascular and jacked!!
    
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- Klystron@sh.itjust.works ⁨1⁩ ⁨year⁩ ago
  If you’re however old you are now and still not a blood making machine, I’d say see a doctor.
  
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fubo@lemmy.world ⁨1⁩ ⁨year⁩ ago
The number floating around the web is 650 calories but I haven’t been able to track down the actual source.

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- Overzeetop@kbin.social ⁨1⁩ ⁨year⁩ ago
  So I can shotgun two pints of beer after a donation (gotta rehydrate!) and still be a couple hundred calories ahead? Win-win!
  
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  - jscummy@sh.itjust.works ⁨1⁩ ⁨year⁩ ago
    And you’ll get drunker due to the blood loss!
    
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  - Scrollone@feddit.it ⁨1⁩ ⁨year⁩ ago
    Jokes aside, you shouldn’t drink alcohol the day before and after your donation
    
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- Fosheze@lemmy.world ⁨1⁩ ⁨year⁩ ago
  Hmm. Not as much as I hoped. You could probably eat that many calories in the free snacks they have afterwords without anyone even looking at you funny.
  
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  - DrMango@lemmy.world ⁨1⁩ ⁨year⁩ ago
    There is no good way to outpace calorie consumption with activity. It is far far easier for humans to consume usable calories than it is for us to spend them.
    
    In our ancestors this meant that we were able to go a long time between good meals during times of scarcity and still survive, but today it just means that if you’re worried about calories you should start in the kitchen, not the gym
    
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  - key@lemmy.keychat.org ⁨1⁩ ⁨year⁩ ago
    Eat the snacks before donating. That way your blood glucose spikes and you ‘burn’ maximum calories.
    
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ultratiem@lemmy.ca ⁨1⁩ ⁨year⁩ ago
It’s something you’ll never truly figure out and can’t really as your body is a constant state of maintenance. When my brother was rushed to the hospital with pneumonia, the next day he didn’t really grow a beard. Makes sense. When you’re at deaths door, maybe don’t worry about growing hair.

Your body is always managing resources.

Basically it’s going to take the energy needed from other maintenance items (hair, nails, skin, etc.) and devote them to blood manufacturing. It’s also going to cut your energy to save calories so you’ll feel pretty sluggish for a bit.

How we currently deal with calories is just wildly misleading.

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- HappySquid@feddit.ch ⁨1⁩ ⁨year⁩ ago
  Yeah. “Calories in calories out” is correct in theory but it is an oversimplification. Most people burn a vastly majority of their calories “at rest” by just maintaining their body temperature.
  
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Ejh3k@midwest.social ⁨1⁩ ⁨year⁩ ago
I’ve always been under the belief it’s a day’s worth of calories.

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- DrMango@lemmy.world ⁨1⁩ ⁨year⁩ ago
  Considering a day’s worth of calories varies by person and that the general recommendation is 2,000 calories per day for an average, active adult I would question this idea
  
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  - Ejh3k@midwest.social ⁨1⁩ ⁨year⁩ ago
    Then wouldn’t it make sense to not put an actual figure down for how much donating is actually freeing up?
    
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  - HeyThisIsntTheYMCA@lemmy.world ⁨1⁩ ⁨year⁩ ago
    We have 10-ish units of blood in our body. When we donate we give one unit. A unit is around 500ml. Someone else on the thread says 650 cal per donation. That means each ml of blood takes 1.3 calories to make. Work harder you lazy bastards! I didn’t make you out of butter to pump like this!
    
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dynamojoe@lemmy.world ⁨1⁩ ⁨year⁩ ago
I dunno. I usually give platelets.

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