Proposition 37, the initiative to label genetically engineered foods, was discussed in an Oct. 17 article in The Union. What was missing from the discussion was a consideration of the health implications of genetically modified (GM) food. To begin to grasp this issue, one must start by understanding that when foods are genetically altered, it is always for commercial purposes, never for health benefits. Unlike intra-species hybridization that has been done for hundreds of years, the process of genetic engineering involves swapping pieces of DNA between species in a way that nature could never do. So, for example, spider genes …