[Photos] You Will Never Eat Fast Food Again After Reading These Disturbing Facts

3.) Cysteine-L

Fast food restaurants use Cysteine-L, an amino acid synthesized from human hair or duck feathers, to flavor their meat and soften their breads and pastries.

4.) TBHQ

This additive can be found in 18 McDonald’s menu items. It’s potentially lethal, but don’t worry, the FDA says it’s generally regarded as safe (GRAS). Learn more about TBHQ here: The Petroleum Byproduct You Are Most Likely Eating