A friend of mine has a theory that the rise of depression over the past 20 years has a lot to do with the low-fat diet kick the country has been on, even though low-fat diets have never been proven to prevent obesity or to reduce it. Since our brains are mostly made of fat, maybe low-fat diets aren't the best ideas? I personally eat less fat than most people I know, yet I'm still fat.
This makes sense with the link between good fats, like Omega 3s, and elevated moods I keep hearing about.
It's really important to recognize the difference between good fats (salmon, avocado, olive oil etc) and bad fats (fries, butter etc). Same is true for good and bad carbs.
