Studies that deal with toxins (pesticides, fungicides, herbicides), trace elements in soil, genetics of the different varieties, steroids, anti-biotics and dozens of medications that are given preventively that you in turn eat, and all the related topics probably number in the hundreds of thousands. Setting aside organic or not, tomatoes, bananas, cane sugar, cows, pigs, all sorts of things have long histories of politics and controversy. I can't tell you what I think, because it would be very political, but take one issue, any issue or food for that matter and seek information and I'll bet you'll be shocked at what you find. Almost all regulation is done by the companies themselves for one thing. Genes are important, but you will never find a scientist who tells you that they are 99 percent of the determination of your future health. I recently saw an article that said that the mutation that causes lung cancer is 40 percent chance. Your grandparents had vastly different lives and ate far different food. Past generations didn't eat the same oranges or eggs. They weren't swimming in plastics the way we are. BPA is tied to all sorts of negative health outcomes (through evidence). Your grandfather may have had high levels of vitamin D in his youth because he wasn't surfing the net like we all do. Diet is determinative of lifelong intestinal culture which is key to the immune system. You also have a huge number of genes. Your health isn't regulated by a dozen or even a hundred. Your genes are altered through mutation and even infection. There's a lot of pancreatic cancer in my family that is speculated to be related to childhood infections (its siblings). Live in Florida you may get Chagas disease and your genes will be altered. I dunno, life should be enjoyed. We all make negative choices. I could go on for a long time, but if you want you can probably find documentaries on some of the topics on Netflix, your public library or even Youtube.