That said, I think it's obvious that most people need to challenge the status quo of their diet. For Grain Brain to remind them "you are what you eat" is a step in the right direction. For both to suggest that you can be sensitive to gluten so give it up for 30 days...well, that's not going to hurt anyone either.
Moi? I read them as guidelines and suggestions. Sure, perhaps not 100% pure science, but there was a time when science said the world was flat, smoking was ok, etc.
To say "this things are worth looking at as you revist your health" might not be ideal. But neither is a bag of chips and a stack of cookies.
Ultimately it's about:
- Changing your relationship with food. Food is for health, not to experience an aural orgasm.
- Lifestyle. Diet is just one way to mind your health. Junk is junk, whether that's food, friends, or information. Trying to fix your health only via diet is, as you note, a fool's errand.
http://www.cbc.ca/news/wheat-belly-arguments-are-based-on-sh...
The only diet* I've had any luck with is the No S Diet: No Snacks, No Sweets, No Seconds, Except (sometimes) on days that start with "S".
So while I agree that cutting out added sugars is a damn good idea, I very much disagree with the unfounded "all carbs and grains are BAD!" alarmism.
It's not perfect, it doesn't make huge promises and it's not going to make the weight magically disappear instantly or even over a period of weeks, it's a long-term thing. But it is straight-forward and (most importantly) relatively easy to adhere to, and it doesn't require massive amount of effort, like diets where you have to count every calorie and in-depth micromanage your nutrients. Of course there is plenty of room for cheating (you could eat a whole plate of chocolate and call it a "meal"), but that's a fault of all diets where you're not actively forced by someone else to adhere to the rules.
Short-term diets are stupid and counterproductive. We don't need diets or temporary crash weight loss, which just leads to yo-yoing. We need actual, lasting lifestyle changes to make sure the weight stays off and we stay healthy.
* http://nosdiet.com/