Are werewolves or vampires real?

1. Vampires, defined as a humanoid being that MUST consume blood or energy to survive do not exist. Cut and paste time, as it is too much work to type this out over and over and I "recycle" my own answers instead of retyping them so here goes. A brief discussion of the human digestive system and then the probable vampire population given an exponential growth rate should explain why vampires are not possible. 2. The human body is not designed to process large amounts of blood for nutrition. There is not enough protein, carbohydrates, and fats present in blood to maintain a complex creature such as Homo Sapiens or any theorized offshoot mutations. When a human ingests food it is first broken up into a bolus by chewing, then churned up in the stomach with digestive juices to form a mass called chyme. It then passes through the pylorus into the duodenum, part of the small intestine where it mixes with bile salts and secretions from the pancreas and liver which continue breaking it down ...  more