[quote=@AdobeFlash]
<Snipped quote by Witch Cat>

He needs the blood to survive, so he hides it in other food due to his hatred. It's a strategy, and a use for alchemy.
[/quote]

Is there anything as a blood substitute? Does animal blood make him gag? Is it the thought that the blood came from a living thing that disturbs him? Does he slave away in his lab trying to make artificial blood to end his guilt?