The site mercola.com is basically untrustworthy on all topics related to health and disease, which is about all it ever writes about.

http://www.quackwatch.com/11Ind/mercola.html

http://www.alternet.org/personal-health/four-biggest-quacks-...

http://rationalwiki.org/wiki/Joseph_Mercola

http://www.sciencebasedmedicine.org/joe-mercola-quackery-pay...

http://www.sciencebasedmedicine.org/more-breast-cancer-aware...

http://www.sciencebasedmedicine.org/mercola-gardasil-and-toy...

http://www.sciencebasedmedicine.org/9-reasons-to-completely-...

http://scienceblogs.com/insolence/2012/08/03/15-years-of-pro...