Why You Should Never Eat A McDonald’s Apple Pie Again—Ew!

To increase the pliability of the dough in its apple pie, McDonald's, uses L-cysteine, an amino acid. According to The Vegetarian Resource Group, a common source of this is duck feathers. (Yes, you read that right, ick!) Prior to using duck feathers, the group writes, L-cysteine has also been sourced from human hair.

Although L-cysteine is "considered a substance that is generally recognized as safe by the Food and Drug Administration," it's still something to think about. 

Apart from these strange ingredients, the apple pie has 230 calories per 1 serving and is high in both sodium and sugar, so there really aren't any reasons to eat this for your health. Plus, making apple pie from scratch always allows you to know exactly what is in it!