[wbl]

You digestive system doesn't absorb intact protein but disintegrates it.

[markdown]

Look up variant Creutzfeldt-Jakob disease (aka Mad Cow Disease).

[exabrial]

Largely caused by animals being fed their own kind, but once the protein is created, it's nearly impossible to destroy. It's denaturing temperature is 600+ degrees and it laughs in the face of irradiation. Id be curious if the prion is susceptible to high pressure treatment