How To Survive As A Vampire Without Feeding.:

As part of the Dark Brotherhood quest line you have to go to Fort Farragut, this is where Lucien Lachance lives. As you know (or at least I hope you should) vampires have to feed on blood. Mr. Lachance has rare alchemy ingredients in a tub in his main room next to where he stands, these ingredients are human hearts, human skin and bottled human blood. These ingredients are found in only two places; Fort Farragut and The basement of the house across the street from Rosethorn Hollow (the buyable house) in Skingrad. All you have to do is get some of the bottled blood and use the item duplication glitch on it and there you go, unlimited blood for your vampire character.