How are the ingredients listed in ingredient labels?

Ingredients on a food label are listed from the most abundant to the least abundant. So if you see some cereal boxes they have "sugar" listed first. That's because that is the most abundant...

They are listed by quantity. The highest to the lowest.

My gosh it is the label on the food product that you purchase

Labels state the largest amount ingredient first, to the smallest, last.

They're in descending order from the ingredient which has the most to that with the least.