80%
If I remember correctly from the book, she can eat human food, but she doesn't like it much and prefers blood. So I suppose that she doesn't really need it in the terms that she can survive without it, but she strongly prefers it to the human food.
The human body does not need sugar to survive.
Head lice eat blood from attaching themselves to someone's head. Each only needs a small amount of blood to survive though.
On average, a human needs to drink about 8 cups (64 ounces) of water per day to stay hydrated and survive.
They need blood to survive
Because
The average adult human has about 10 pints of blood in their body, but you can survive with as little as 6 pints. The exact amount needed varies depending on factors like size, health, and medical condition.
It needs the human bodies temperature to survive.
human beings need nitrogen for building proteins and o2
Yes. All animal's brains need blood to function
All of them.
Cobiasco Vampires are vampires that do not feed on human blood or any other blood that normal vampires feed on. Instead, they need to feed on the blood of a werewolf in order to survive (talk about being your finicky eater) == == == == ----