What are your "red lines" foods and why?

I had to really think about this question. I don't believe that anything like that exists for me. There's no one food that if I eat it, it means the end of my healthy lifestyle. I can eat whatever I want and still be healthy IF I control the frequency and amount of it. I also don't really like most of the foods that are truly bad for you. Fast food and fried foods make me queasy, for example, so I don't even eat any of that garbage. I do like sugar, so although I do have treats now and then, I just control portions and it's not a problem.

For example, you listed 1,000 calorie mall cinnamon rolls. I just ate ONE 347 calorie homemade cinnamon roll right from the oven and it was crazy delicious and yes, there was butter! I make most of my comfort foods at home, so I can control what goes into them and adapt them to make them healthier. Plus, there's no upset stomach and heartburn that goes with all that crap you buy pre-made. So, for me, a cinnamon roll is not the end of a healthy lifestyle, it's just part of a healthy lifestyle.

P.S. True food addicts probably need to avoid their triggers at all costs. Non-addictive personalities probably just need to change their mindsets away from the shame and guilt. Don't feel like you failed if you eat a treat. Just mind your portions and focus on the majority of your eating being healthy and balanced. A treat now and then is nothing to be ashamed of.

For me it's yoghurt! This week, I've had a 1 litre container full in one go. Three times.
Luckily it's the low fat type!