You’re 28 yeah?
Personally? Yes I’d say it would matter. Whatever hormone changes men have as they hit middle age going on up, is more or less the same thing that happens hormonally to women as we age as well. We produce less of the things that we once produced more of when we were younger. You mentioning being born under complicated circumstances, I’d think it would be of high importance to monitor those aspects of your health.
I mention hormones because they tie in quite a bit concerning metabolic functions. I don’t know how your training looks, but beside that, I’ve often seen individuals who were very thin or underweight, gradually gain weight to the point where they’re more or less…pudgy? Whatever weight gain you’ll experience (and I’m just kinda going with general deduction), it may or may not also affect your hormonal functions, which then more than likely will affect your metabolic functions as a result.
Not trying to freak you out or anything, but I’m close to your age, and we’re more closer to 30 than we are 20 (nothing wrong with that, but it’s important to make note of that). Your food choices tie in pretty heavily with that, and I think your overall food choices should change accordingly as your body changes.
All things considered, eating fast food is a quick way to get fat. It’s easy to creep upwards of 3000+ calories eating fast food. Especially if you’re eating it frequently throughout the day (not saying that’s what you yourself are doing, but in general it’s easy to fall into doing that) I’ve done it many many times, and I’m 11 inches shorter than you, and I’m female. If you’re burning enough energy to counteract the amount of calories you’re consuming, then great, but most folks aren’t.
But if you begin to put on weight in the form of fat gain over a prolonged period of time, it might be best to choose better food options. I’d say just choose that now, so In the long run it won’t be something you’ll have to teach yourself how to do, and it’ll be something that’ll help you avoid the possibility of unwanted fat gain. At least by doing that then you’ve already just given yourself a head start.
Going back to that tid bit I mentioned about training, how does that look like? What set-up are you employing? What kind of goals are you after? If any?