How about a side of silver with your yogurt? According to an ongoing inventory by the Project on Emerging Nanotechnologies (PEN), 96 food items containing nano-sized particles of titanium dioxide—including many found in the dairy aisle—have hit the market. And that number is up from just eight foods in 2008. […] So what’s the big deal? In short, too many unanswered questions. In 2012, the FDA released a draft revealing its many safety concerns about nanoparticles in food. Specifically, they worry that nanoparticles alter the bioavailability, or how much your body can absorb of a substance, and may cause unforeseen...