Walk through any grocery store today, and you'll likely see more shelf space devoted to organics—foods that are grown without most synthetic fertilizers and pesticides, and animal products that are free of antibiotics and hormones. Demand for organic food is up, with sales reaching $35.9 billion in 2014 Is there a benefit? While organic foods have fewer synthetic pesticides and fertilizers and are free of hormones and antibiotics, they don't appear to have a nutritional advan