Thanks, you reminded me I was going to do a reverse image for the source, glad I did because not only did I find the methodology I also discovered other “least healthy fastfood X” charts lol

Post updated with link to Source

Methodology & Sources

These are the steps we followed when analyzing the nutrient profiles of equivalent items at America’s most popular fast-food chains:

We defined a set of products: cheeseburger, chicken burger, regular fries, regular vanilla shake, and nuggets (10 pieces).

We looked for the closest possible product at In-N-Out, Burger King, McDonald’s, Shake Shack, Wendy’s, Sonic, Carl’s Jr., Jack in the Box, Five Guys, Culver’s, A&W, Steak n Shake, Fatburger, Smashburger, Dairy Queen, KFC, Chick-fil-A, Zaxbys, Popeyes, Raising Cane’s, Arby’s, Church’s Chicken and Bojangles.

We consulted each chain’s nutritional menu to collect the Calories (Kj), Sugar (g), Saturated Fat (g), and Sodium (mg) values for all the available products.

We used the Department of Health’s nutrient profiling method to assess the relative unhealthiness of each item on our list. In short, each item receives an individual score for energy (kJ), saturated fat (g), total sugar (g), and sodium (g), based on the weight of these components, which combine for an overall “unhealthiness score.”

Total nutrient points = (points for energy) + (points for saturated fat) + (points for sugars) + (points for sodium)