As true as that is, it is remarkably hard to get evidence-based, clear guidance on what to eat and not eat. Instead, it's a bunch of competing camps, with none having comprehensive evidence.
We're not far out of the caves when it comes to nutrition.
That's in part because food is extremely complex, so it's hard to isolate nutritional factors.
It can be done to some degree, but it's hard. There are some best practices for how to pursue it, but it tends to not get recognized as a legitimate approach because it falls outside the way science is typically done.
I'm aware it is sort of "off topic." But being "on topic" for this stuff means basically agreeing with the default ideology.
It's sort of like racism and sexism in that regard: There is no time or place where it's socially acceptable to state the obvious. It's "rude" and "off topic" and "this isn't the time or place for that" etc.
The initial response to the current pandemic was for a lot of groups to do things like work on developing open source ventilators, which I felt was a bad idea and the wrong approach and I expressed my concerns at the time about it. It eventually became clear that people with Covid-19 were poorly served by ventilators.
If everyone had remained stuck on "Let's just provide ventilators," this pandemic could have been even worse than it was. Fixation on shiny tech as a medical solution is a very serious problem with practical real world consequences that directly impacts availability of viable treatment for patients.
Neither of those apply here. Conflating research into gene editing technologies to fix previously unsolvable medical problems with a 'fixation on shiny tech' and implying that this research is just flashy headline grabbing, is insulting to people who suffer every day as a result of these conditions and stand to gain considerable quality of life improvements if this research ultimately leads to new treatments in humans.
It is a question I wish science had some answers for.
Though based on firsthand experience I will say that prevention of loss of ability is generally a more realistic and achievable goal than restoring lost ability.
If you want to know what foods have been helpful to me, personally, in dealing with a different genetic disorder, I could answer that question to some degree. Though I generally dislike trying to do so in a comment on a forum, in part because it's something I have been working on for nearly twenty years, so an off-the-cuff comment generally isn't going to be an adequate explanation.
But no diet or exercise is ever going to restore ability that was never there.
In vernacular architecture, local materials are used. An adobe house in the Southwest of the US looks very different from, say, an igloo.
That's kind of the difference the diet and lifestyle can make and it's something you can engineer yourself with enough reading, keeping a journal and so forth.
It won't fix everything, but study after study after study shows that "diet and lifestyle" are major factors in every deadly disease from cancer to diabetes to heart disease, yet people basically point and laugh if you suggest these are a legitimate means to address a serious condition with a genetic component.
The reality is that much medical research is aimed at the ability to look impressive in headlines and far too little of it is aimed at genuinely improving human health and quality of life. And noting that gets far too much flak from far too many people.