Importance of nutrition

I was on Andrea Nakayama's website, reading her article.
Andrea is a nutritionist whose husband, Isamu, was diagnosed with a sever brain tumor: he was told to live 6 months.  Andrea begun to learn about food.  This was why she became a nutritionist.

In her article, she says,
In fact, the origin of the word “diet” according to the Oxford English Dictionary is “the course of life; the way of living or thinking”.

I like it.  "The course of life; the way of living or thinking".  I totally understand what it means from my experience.  Diet, it is not about losing weight, getting in size two jeans.

Meeting with and talking with "real" doctors makes me feel like these stuff is a bogus...

Feel discouraged about my beliefs...

Andrea's husband out lived by 2 years on the diet they shifted and worked on.

I want to continue believing in the importance of nutrition.