IMO it's a fun topic. Look up dirty cuts on /r/loseit, you'll probably find some funny pictures. I remember a photo of an absolute bean pole holding up his food for the day, IIRC something like a king-size oreo chocolate bar.
(Eating all the king size stuff like it's a "meal in a bar" is an amazing feeling btw)
The worst effect I had from any food was from salad. This was at a different point, when I was cutting down on fat and lining up my macros. I ate so much spinach (along with my almonds) that I over-oxalated myself and went to the ER with massive pain from my fresh new kidney stones.
Pooping is very nicely taken care of by hydration. This is a surprising one to a lot of people. It's not a problem. I drank over 100 oz a day. BTW never do that with mainly pickle juice. Funny experience.
I also sprinkled some other foods in there for variety. But maybe at least 2/3 of my meals were junk food for a substantial period. And for some solid period of time it was all junk. As much junk as possible. It's a very extreme state of mind when you are cutting that much so you need the emotional support of a pretty candy wrapper and child-like attitude sometimes.
Blood sugar is not a problem for me or in my family history--it's a safe zone. Subjective factors like this are very, very important btw. I was also exercising lots, like 2 hours hiking every day and the BWF routine from reddit, gobs of pull-ups since I could never do them before, etc. Resting pulse was in low 40s, always got grilled on that one when I went to the doctor.
> And just how much chocolate are we talking here?
IDK, how would you measure it going beyond the powder mix-ins? I consume at least 5 tbsp of raw cacao powder a day, plus all the other times when I'm eating chocolate, but that's less straight up chocolate.
(I also have a weird theory that chocolate and sweets are a very good match for my subjective psychology and it's kinda related in general to people who eat like Warren Buffett btw.)