A few data points:
* the radiation levels where I live in southern Idaho were 80 times higher than normal after Fukushima, so some of us may have received an additional lifetime dose of radiation in 2011 (we'll never know because they stopped reporting radiation levels)
* some proteins like gluten (and the larger lectin family) are similar to ones in the thyroid and trigger the immune system against it, which could lead to or exacerbate diseases like Hashimoto's
* lectins in legumes and nightshades trigger the lining of the intestines to release, allowing bad bacteria and toxins to cross the intestinal epithelium
* sugar is toxic in large quantities and acts like alcohol in the body, causing obesity, organ damage and possibly even insulin resistance
* GMO crops contain compounds not found in the human diet, in plants, or even in nature. these are probably in trace amounts, but combined with the gut flora disruptive effects of glyphosate, could trigger autoimmune responses
* many preservatives like sodium benzoate are mutagenic and will either be found to be carcinogenic soon or are already banned in Europe and elsewhere
* our definition of macronutrients is too broad, so one fat like omega 6 might be substantially more harmful than 3 or 9. the same goes for carbohydrates and even proteins
* our bodies don't hold fat because they need it, but because they are disrupted by the extreme levels of cortisol we carry in the modern rat race, and because they have no place else to store the toxins that we eat, drink and breathe
* to a first-order approximation, most people get no exercise, so miss out on the regenerative cellular machinery that only activates during stress. so now ideas like intermittent fasting distract us from stuff that actually works like pumping iron
* medical science mostly focuses on averages, and single causes for illness, so almost completely ignores holistic effects or even the basics like tracking net calorie intake instead of gross
There are so many dangers like this being obfuscated by the mainstream media that I could spend the rest of my days listing them.
I'm more than 50% confident about them, but feel free to investigate. We don't have epidemiologic studies for most of this stuff yet, so I can only go by correlations and advice from experts. But the more I learn about obesity and my own struggles to regain my health, the more I'm convinced that most nutrition advice is completely wrong.
Obesity has less to do with personal responsibility and calorie deficits than with the breakdown of our food supply. Fixing it will require systems-level thinking.
The starting point is to ban organic food. That may sound extreme, but we can not as a healthy society allow a two-tier food supply to be a thing. We're looking at a future where all of the hard-working people doing the physical labor that runs the world are forced to live on substandard food and die early of preventable illnesses. Sure, scientists have the intelligence to "improve" food, but they don't have the wisdom or experience to understand the ramifications of the choices their egos make. And they certainly don't have the stomach to afford the liability insurance to cover the trillion dollar medical bill we're all now saddled with.
My partner and I have chosen to buy mainly organic food now for these reasons and more. But it breaks my heart to think about the billions of people who can't afford it. I feel a great sense of shame for the academics and leaders who led us down this path.