Americans increasingly rely on processed food products as key parts of their everyday meals, even as scientists are just starting to scratch the surface in understanding how these food products influence our health. Now, these products have reached the political discourse. Robert F. Kennedy Jr. has targeted ultraprocessed foods as a key part of his plan to “Make America Healthy Again.” As part of FERN’s special series in partnership with Inverse, reporter Claire Maldarelli interviewed nutritionist and public health expert Marion Nestle.