• Sneezycat@sopuli.xyz
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      7 months ago

      Let’s do the math…

      You can donate three times a year to the red cross (once every 112 days). According to some page, you donate around 10% of your blood volume each time.

      That means, for a volume equivalent of 300 people, you’d need to donate 3000 times, which would take around 1000 years.

      The vampire is going to need more people, or to keep a person alive 1000 years with vampire magic.

      • kernelle@lemmy.world
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        7 months ago

        When you’re harvesting the blood iron of your enemies you don’t have time for ethics. A controlled study managed 4 weeks within ethical boundaries, maybe we can cut that in half unethically. So 14 days, 3000 . 14 = 115 years. So when you torture two people, you could manage to do 58 years. Better start early!

      • Mikufan@ani.social
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        7 months ago

        3 times a year? Where i live you cab give 1/2l every two weeks at a bloodbank.

        And i can take more and by that activate a immune response to produce way more.

        • ColeSloth
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          7 months ago

          The same blood bank? You sure that’s not plasma instead of blood? Plasma re-makes itself way faster than red blood cells.

            • ColeSloth
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              7 months ago

              Oh. That explains it. Normally in the US a typical donation is a full pint. Not a half pint.

      • ColeSloth
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        7 months ago

        You’re off on blood production. “Safe” would be once every six to eight weeks for a pint. Plasma can be taken a lot more often. The red blood cells take a while to replenish.

        But let’s get real. You’re not concerned about your enemy feeling well. Force them to take iron supplements and take a pint every other week. They’ll likely stay alive that way. Fuck em, right?

      • variants@possumpat.io
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        7 months ago

        But remember they are your enemy so you could drain a bit more blood more often to shave a few years off maybe

    • knorke3@lemm.ee
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      7 months ago

      But then you need to feed them iron-rich foods which could be used to make a vegan alternative instead, expanding your potential market.