Bloomberg News

Friday marks National Fast Food Day, just days ahead of the Thanksgiving national holiday. 

Last month the Centers for Disease Control and Prevention released a four-year study that revealed that 1 in 3 adults in the U.S. consume fast food on a given day. With men and the young eating more fast food than women and the elderly. 

Flying in the face of conventional wisdom, people with higher incomes were more likely to consume fast food than those with lower incomes, according to the survey. 

Americans spent more than $208 billion on fast food in 2017, compared to just $6 billion in 1970, and are expected to spend $225 billion annually by 2021, according to Holidays Calendar. 

See how some of your favorite restaurants are celebrating Friday's holiday: 

Burger King (QSR - Get Report) will begin offering deals through its mobile app Friday through November 18. Some of those deals include a $5 Whopper Meal, a $5 Crispy Chicken Meal and a $5 Whopper Jr. Meal for two. 

Pizza Hut (YUM - Get Report) is offering two item's from a special menu for $5 each. Items on that menu include a medium 1-topping pizza, 8 boneless wings, Tuscani pasta, Stuffed Garlic Knots and various dessert items. 

Sign up for Jack in Box's  (JACK - Get Report)  newsletter and you can get a free medium curly fry with the purchase of a large Coke this weekend only. 

Chick-Fil-A is offering a free chicken sandwich for customers who place an order using DoorDash. That offer runs through Nov. 20 and is only available in certain cities. Customers looking to cash in on the deal have to use the promo code "CFADELIVERY".