Just FYI, Mercola is really not a good source to link to for anything. For instance, he thinks mobile phone radiation causes cancer and peddles anti-vax messages. Can't comment on the specifics of that article, but wikipedia does point out:

> Phyllis Entis, a microbiologist and food safety expert, highlighted Mercola.com as an example of websites "likely to mislead consumers by offering one-sided, incomplete, inaccurate, or misleading information."

Some more sources:

[1] https://www.quackwatch.org/11Ind/mercola.html [2] https://en.wikipedia.org/wiki/Joseph_Mercola [3] https://sciencebasedmedicine.org/9-reasons-to-completely-ign... [4] http://www.chicagomag.com/Chicago-Magazine/February-2012/Dr-... [5] http://www.alternet.org/personal-health/four-biggest-quacks-...