During my research on baking bread I found this tasty morsel.

Disturbing fact #2, 737,298:

Human hair is being used in many factory-made baking products. It is being used to synthesis an amino acid called L-cysteine (L-cys), a ubiquitous food additive.

L-cys puts the bounce in a loaf of bread and extends the shelf-life in industrially produced baked goods. The hair, it would, seem is mostly sourced from Chinese hair salons.

Read more: http://www.motherjones.com/politics/2010/03/human-hair-additive-your-food/