For example, he believes that Aspartame is surely a deadly neurotoxin that EVERYONE uses daily: http://www.huffingtonpost.com/dr-mercola/aspartame-health-ri... And also, pasteurized milk is surely bad, right? http://www.huffingtonpost.com/dr-mercola/dairy-free-avoid-th... (nevermind the other issues at play!) (and milk in general is a deadly cancer-causing toxin! http://articles.mercola.com/sites/articles/archive/2000/07/3...)
This guy has some extremely fringe and poorly supported claims, has a vanity domain name offering health advice, and sells health products direct over the internet (including known scams like Acai berry extract, "bioTHIN", and even a line of "healthy cookware!").
In other words, he has all the red flags of a Kevin Trudeau that hasn't been caught yet. He's selling magic light lamps (http://products.mercola.com/himalayan-salt/himalayan-salt-la... ) for pete's sake!