Absolute nonsense, I feel amazing after eating fast food. I generally just get a chicken sandwich or burger or snack wrap, no soda or fries, maybe a milkshake - why would I not feel great after eating protein and fat? Dairy feels great for me too. This has to be utter nocebo on part of anyone who's convinced fast food is killing them, there's no way the food itself has that effect. The demonization of fast food is nonsensical in general - a burger made at McDonald's is not nutritionally different in any significant way from one made at home.
The hamburger bun has sugar, dextrose and maltodextrin, etc in it. When I bake bread at home, I don't add those things. The ketchup has corn syrup. These things might be small but maybe they add up.
Not OP but when I make burgers at home I bake my own potato buns (not necessarily on the same day). No bakery around me makes soft savory buns and the prepacked store-bought ones have this weird synthetic and stale flavor.
Absolute nonsense, I feel amazing after eating fast food. I generally just get a chicken sandwich or burger or snack wrap, no soda or fries, maybe a milkshake - why would I not feel great after eating protein and fat? Dairy feels great for me too. This has to be utter nocebo on part of anyone who's convinced fast food is killing them, there's no way the food itself has that effect. The demonization of fast food is nonsensical in general - a burger made at McDonald's is not nutritionally different in any significant way from one made at home.