I've fasted for up to 5 days before, and for the past 6 weeks or so I haven't eaten breakfast or lunch during Mon-Fri - it's surprisingly easy to do.

I also very much dispute the oft-cited claim that "breakfast is the most important meal of the day" - my theory is that it came about as a marketing push for breakfast cereal companies looking to push their cheap carbs. It's become an ingrained, indisputable "truth" - hence some of the comments you got.

I remember being told as a kid that breakfast was really important, so I had "energy" and would be able to concentrate better.

I realise now that it's nonsense, at least if you eat a carb-laden breakfast. Eating carbs seems to start a cycle where you are going to feel hungry ~2h after eating (signalled by a blood sugar drop back to normal levels), regardless of how much you ate. I remember this from my school days too, not being able to focus because all I could think about was my next snack/meal!

I skip breakfast almost everyday. I get my morning brain startup sugar from cream in my coffee. I too get pushback from people when they find out I skip breakfast. They say it's the most important meal of the day. I tell them that's propoganda. Thank Kelloggs for that. People always ask how I'm so "skinny" (I'm not, I'm just not overweight like most Americans...) I believe it's because first off, I eat meals when I'm hungry, not when I'm 'supposed' to eat. I will sometimes miss or 'forget' lunch. If I'm not hungry enough to remember, then I'm not hungry yet. Second, I believe my longer fasts between meals, skipping breakfast, I believe I go into ketosis sometime in the early AM. By not breaking my fast my body continues to burn fat. One other thing to note: if I eat a breakfast, I'm bound to get hunger pangs around breakfast time the following day or two. If one succumbs to the hunger pangs, they will soon be eating breakfast daily. Get through the pangs for a day or two (drink coffee, water, or tea) until they are gone then you can get off the need for breakfast. Also, I avoid alcohol in the evening. Especially anything more than one drink. Getting drunk will lead to hunger pangs the next day well into the afternoon.