In 2021's list of Chick-fil-A's highest-selling items, the chain's famous chicken nuggets and classic chicken sandwich took spots number three and four, and their signature waffle fries took first place. Since these items are fried, it makes sense that Chick-fil-A buys more of a certain ingredient than any other company in the world.

Peanut oil — not chicken or potatoes — is the most-used ingredient at Chick-fil-A, and the chain has been frying its chicken in this oil since the company's founder, Truett Cathy, began experimenting with his recipe in 1961. It turns out that Chick-fil-A is also a record-breaking buyer of another ingredient, as well.

In 2015, Chick-fil-A bought 250 million lemons from Sunkist, which is more than the entire nation of Japan purchased that same year. Chick-fil-A's lemonade is getting some flack on social media lately, due to customers and employees contesting whether it's "freshly squeezed" or not, but we know that it starts with a lot of real lemons.