Julia Caples, 45, has been sucking the blood of willing donors for more than 30 years.
She meets fellow vampire enthusiasts at a local occult and oddities store where she cuts them with a pagan-style knife before lapping up their blood.
She believes it keeps her young and vigorous, just like the ageless bloodsuckers from movies such as Twilight.
The blood-thirsty care worker claims there is a huge sub-culture of blood drinkers across the world.
“When I feed off of a person and drink their blood I feel stronger and healthier,” she said.
“I know scientifically there’s not a lot nutrition in blood, but maybe there’s some value we haven’t discovered yet.
“I feel more beautiful than any other time when I’m regularly drinking.
“I’m also extremely healthy with no major health problems, and I have an abundance of energy all the time.
“At times I’ve drunk half-a-gallon a month.”