Commercial bread factories knead in an amino acid called L-cysteine to extend a bread’s shelf-life.
One of the ways L - cysteine is derived from human hair and is mostly manufactured in China where they use either duck feathers, pigs bristles, cattle hooves and horns or human hair collected from the floors of barber shops or hair salons.
The manufacturers also sometimes use Hog hair when there is a shortage of human hair.
One can avoid L- cysteine by buying bread from the local baker, baking bread at home and staying away from some of the most popular junk food outlets.
According to Ayurveda, you are not only what you eat but also what you can digest.
Foods with preservatives are not only difficult for the environmental bacteria to consume, they may also be difficult for our gut microbes to digest.
More has changed in the last 75 years or so in the human diet as compared to the last 10,000 years or more.
It's best that one eats whole foods including fresh produce, grains and foods that are closest to the source as possible.