• Sneezycat@sopuli.xyz
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      6 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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        6 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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        6 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.

      • variants@possumpat.io
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        6 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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      6 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.