Alternative websites about nutrition, health, and medical information

Besides optimizing software as part of my daily job, I have been very interested in optimizing human body (myself in fact) recently. Mainstream government sources and media outlets are definitely one source of information. However, like anything else, I have found that occasionally getting different information from alternative sources can be extremely helpful. Here are a few interesting websites I come across so far.

• http://www.mercola.com/ A very controversial doctor's website. Though polluted with advertisements, many articles seem well researched. There is a very large and active user community adding lots of insightful comments for most articles there. 
• http://www.doctoroz.com/ Dr. Oz hosts a popular TV show program. He has touched a wide range of highly relevant topics and interviewed popular people in the field of diets, nutrition, health, and so on. 
• http://www.bulletproofexec.com/ A rather ambitious website which tries to optimize multiple aspects of your life, including diets, mind, body, sleep, and sex. 
• http://authoritynutrition.com/ A freelance blog by a nutrition majored student. Quite some well sourced beginner information for people to understand good practices in nutrition and food.