I would have never thought of that. I would have no ethical compunction against using my own blood for cooking. But, I really don't miss eggs in my baking that much. And, I'm not sure my guests at dinner would be enthused to learn that the food their eating contains human blood. I'll have to ask some vegan friends what they would think of foods made with human blood from a voluntary donor. That's sure to make me the life of the party.