I can definitely see the correlation there Lex, but even most people your age don't have the discipline to give up all unhealthy foods.
In my situation I do usually experience direct negative side effects of eating unhealthy food, but nowhere near what you're talking about. Usually if I eat a good amount of something bad I'll feel either stimulated or drugged, or one then the other. Then I'll usually have digestive problems and an off kind of bowel movement the next day, and if it's really bad sometimes a head ache one or two days later.
The other thing with me is that instead of going to Big Mac's and Twinkies I would prefer to eat something like roasted chicken with vegetables, some kind of soup, sushi and most other Oriental food, stuff that is considerably healthier than a SAD diet. But I can't bring myself to do it because of all of the knowledge I've gained about even the large amount of unhealthy substances in what most people consider healthy, like organic grains or cooked organic/grassfed meat and cooked veggies etc.
The problem I have with my current diet is basically two fold. The one I've talked about before is the disinterest in my food that I have coupled with cravings which are also tied to watching everyone else in my life eat foods much tastier and easier to eat than mine. The second problem is that I want to gain a little weight, and when I did that before lifting weights and eating when I was younger I basically just ate a lot and it worked out well. I thought I was eating healthy but really wasn't, I was just eating a lot of junk (although no candy or other sweets, not a big fan of those over savory foods). Although I have gotten to the point of being able to stomach just about any raw food, I lack the desire and enjoyment of it to consistently eat enough to gain weight.
It's such a hard thing for me, what I want is to have a reasonable amount of desire to eat the food that I believe is healthiest for me; not for it to taste like candy or McDonald's but good enough so that I want to eat it. I'm worried that the kind of desire I have to eat cooked foods I like will never be attained on raw foods, possibly because the desire to eat these cooked foods is tied to addictive substances in them that don't exist in raw foods.