cimbal
Now, this is very much against the spec [0]. At first glance, the doubled functionality of encoding parameters is irritating, there are query parameters already, so ?page=70 would seem more consistent. But then, this has been worked on for a long and it makes sense to add a whole set of functions for certain mime-types.
My experience, and there was i time i was really into this, doing interviews with mostly young people. The results fit the assumptions of William L. Wolcott very well, that most people basically fall into 2 groups, fast and slow metabolizers. They differ significantly when it comes to digestion. One group needing more of certain minerals then the other when eating the same foods (potassium making the biggest difference as far as i remember). I remember often guessing correctly what type of water brand people would prefer based on this (chosing between 2 favourite sources, one with high potassium content. the sample size was small, but i'm really sure you can replicate this).
If this is due to genetics or due to gut microbes or both at the same time - i really don't know.
So, i think that the macro level does differ between people. That every person needs an individual mixture of nutrients to keep the metabolism in balance.
Btw, you can modify your metabolism bye eating differently and the body can adapt for a long time before any clinical symptoms show.
Wolcott explains the differences between those 2 groups in the following way: either the sympathetic nervous system or the parasympathetic nervous system is stronger and determines your metabolic type. And those systems can again be influenced by the environment (climate, food availability etc.). https://en.wikipedia.org/wiki/Autonomic_nervous_system
As i could use his theory to predict food preferences, i never questioned the basic premise. Would be interesting to do some more digging again.
One more thing: it's also true for many types of medicine.
[1] http://www.amazon.com/Nutrition-Solution-Guide-Your-Metaboli... don't have that book handy so i can find the original source
I want to add to that the nutritional needs within each person vary drastically during different times of year (or times of stress, even down to times of day). Athletes know this, for example, it is common to exhibit significant drops in performance during a year of training (recurring every year).
Now combine these simple observations with the way nutritional studies are done and you know why it looks as if we have no clue.
And again, never view fats as something to avoid completely. If the fat is of good quality, it is a nutrient and an essential part of the diet.
sorry for not providing any links, i can not find any good english source materials at the moment. PM me if you want to get some more info. keywords: food combinations, chronobiology, glucose reception
Now, reading the other comments, i wonder if there are any tools that help with diagnosing device capabilities? I don't have high hopes of integrating anything WebGL related in my projects due to these problems, so how can you make sure that WebGL code will work across devices?
Edit: How can you make sure you notice when it's not working?
But i'm not saying that there is no such thing as the microbiome directly influencing your brain, bacteria produce a wide array of by-products. In which way these by-products affect our bodies is exactly the question. I just want to point out that there are types of dysbioses that can reduce the ability to absord certain nutrients and by that could exacerbate the problem of cravings.
Too bad i don't know if turning it off and on again would have worked too.
Also, letting the application serve all the static assets has an even bigger impact on the number of dynos you need. I'm not a heroku user, but it seems there are some good solutions to this problem, like https://devcenter.heroku.com/articles/cdn-asset-host-rails31