Health benefits of taking cold shower!

I have a friend before who always take a cold shower and she told me that it's the reason why she has a healthy shiny hair, and flawless fine skin. I was doubtful, I take it into genetic causes, but since then I started to make a research about it and here's what I've found from online article. The list of Health Benefits for taking cold shower:
1. Brings blood to the capillaries, therefore increasing circulation throughout the body.
2. Cleans to the circulatory system
3. Reduces blood pressure and internal organ
4. Provides flushing to the organs and provide a new supply of blood
5. Strengthens the parasympathetic and sympathetic nervous system
6. Contracts the muscles to eliminate the toxins and poisonous wastes
7. Strengthens the mucus membranes, which help resist hay fever, allergies, colds, coughs.

What do you think?, Do you take cold or hot shower?