Speaking of Hair …

Wigs aren't the only things that can be made from hair (seen via Boing Boing):

Shanghai. (Interfax-China) - The Chinese government has shown an unusually high level of concern as a result of a bold media exposure towards a scandal in which human hair was used to make soy sauce. The government has now ordered an immediate inspection of all domestic food seasoning plants before the end of January.

China Central Television (CCTV), the state television station, first raised public worries over the quality of domestic soy sauce by uncovering a substandard workshop in central China's Hubei Province, where piles of waste human hair were found. The hairs were treated in special containers to distill amino acid, the most common substance contained in soybean sauce.

Human hair is rich in protein content, just like soybean, wheat and bran, the conventional and legally accepted raw ingredients for the production of soy sauce.

I suppose this hair product is also unkosher.