This is good for you, that one is bad, however it was the other way round last month. Bombarded with scientific studies every week sometimes is not easy to follow and even harder to stock the fridge and shelves with healthy choices. For every eating idea now you can pick up the study which supports and another to deny this trend. Whom to trust and which source is believable enough to became your encyclopedia?
I am here to provide easy answers of course. Trust nobody but yourself. Remember the obvious results about how healthy spinach is (it still is, but of magnitude lower than before)? The human error misplaced the coma and this is how Popeye was invented (of course not). It is safe to assume that every study is contaminated with some kind of human touch. Machine learning or AI probably is already working on it, and if not, it should start to find out how many of the current nutrition knowledge is without the error. There could be one study performed a while ago and never done again, which established something which is a constant. And this constant is commonly used by all other scientists. Like average caloric intake for adult being 2000 Kcal on every single packaged food.
Recent studies show that leading role in our eating habits and how do we respond to various types of food is of the individual matter. Say, genes and the set of microbes that you have in your gut. Although you are unable to tinker with your genes (yet), eating certain type of food has an impact to the micro-world of your stomach. Guess what's the numero uno of all recommendations? Cut out sugar and processed foods - WHAT A SURPRISE! This f followed by eat more plants and dietary fiber and get more sleep, exercise, avoid stress sounds like a broken record. We have heard that already. Yeap.
Seams like human nature cannot accept obvious and simple solutions.