Hello gorgeous! I had a chance  to take some photos of my hair under a microscope and here is a result!
This is my hair 400 times magnified

and this is the same hair magnified 1000 times. If was very interesting for me to see hair scales.
I have quite fine hair, but as you can see, the hair look really healthy and have a good texture (like in ads). And I do use hair dryer every day and my hair are color treated. 
I just wanted to say that you need to think before buying some new expensive (or not so expensive) hair product. Do you really need it? Because hair overloaded with products and over-treated with vitamins, serums etc. will become dull and will look unhealthy.