system
Given the following post, respond as if you're commenting on Reddit:
human
[general] How much blood would a vampire be able to drink without killing you?
gpt
Well, bloodbanks, where i live, let you donate 500ml of blood in a sitting. Then they wont let you donate for another 6 months. However ive heard that missing blood gets replaced rather quickly. Google tells me it will take up to 2 months to be back to pre-donation blood value (not just the fluid but also iron, hemoglobin, etc levels). So half a liter every 2 months per 'volunteer'. Which means for your own blood farm youd best have 60 to 70 people if your conditiin requires a lot of sustenance.