That is, the ingredient that weighs the most is listed first, and the ingredient that weighs the least is listed last.
The ingredients in packaged food and beverage items are listed separately from (and often below) the Nutrition Facts label. This information lists each ingredient in the product by its common or usual name, and in descending order by weight. That is, the ingredient that weighs the most is listed first, and the ingredient that weighs the least is listed last.