As more foods produced by nanotechnology are making their way to the public, some consumers worry about the health implications of the largely unregulated industry.

Companies say that so-called nanofoods could be more flavorful and healthier than regular food. There’s even indication that a juicy hamburger could taste the same minus the fat and cholesterol, and peanuts could one day provide an innocuous snack for those with peanut allergies, for example.

Nanotechnology alters the characteristics of materials by manipulating their atoms and molecules, which generally measure only about 1–100 nanometers. A nanometer is one-billionth of a meter, and a single human hair measures 100,000 nanometers wide.