Human Hair and Poultry Feathers

The amino acid, l-cysteine is commonly used as a dough conditioner in commercial baked goods such as bread, pizza dough and pastries.

The main source of this amino acid is hydrolyzed human hair, most likely taken off the floor of some barbershop or salon in Asia. Some of it also comes from the feathers of ducks or chickens. If the human hair supply is running low, hog hair may also be used.


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Posted in Biochemistry

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