You can see how your microbiome is doing by enrolling in the American Gut Project, which is devoted to genetically mapping the microbiome, and paying $99 for a DNA analysis. For details, go to cofounder Jeff Leach's website, humanfoodproject.com.
Gear of the Year
The best tools, tech, and toys of 2013.
Plus: Lance Armstrong's Downfall
ON NEWSSTANDS NOW
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.