Forever Chemicals and GMOs: What the Science Actually Says vs. What You've Been Told

Forever chemicals and GMOs get lumped together as "chemicals in your food" — but they are not the same category of problem, and the confidence being sold on both is bigger than the data behind it. In Part 1 of this two-part series, Dr. Ben Cilento and Dr. Lee Mandel take them apart. PFAS — per and polyfluoroalkyl substances — are the clear-cut case. The National Academies of Sciences 2022 report found sufficient evidence linking PFAS exposure to higher cholesterol, kidney cancer, reduced vaccine response, and lower birth weight. The EPA set an enforceable drinking water limit of four parts per trillion in 2024, but their health-based goal was zero — meaning there is no level of these two chemicals known to be safe. The doctors walk through every exposure route hiding in plain sight: contaminated drinking water that boiling actually concentrates, seafood at the top of the FDA's own contamination data, grease-resistant food packaging including paper straws and molded fiber bowls, processed meats, and produce grown in soil treated with contaminated sewage sludge. On GMOs, the doctors are careful and precise: the major reviews did not find evidence that approved GMO crops harm people — but "no substantiated evidence of harm" is not the same sentence as "proven safe over a lifetime." The safety framework rests on a regulatory concept called substantial equivalence — if an engineered crop looks compositionally similar to a conventional one on a list of measured components, it's treated as equivalent. That is not a long-term health study. The feeding studies behind approvals are mostly 90 days in rodents. The 2016 National Academies report — the one people wave around as the all-clear — explicitly called for better long-term surveillance. The episode then pivots to the real thesis: the chemical load traveling with modern food, especially the compounds that disrupt hormones. Glyphosate — Roundup — shows up in roughly 75% of the sampled US population and in over 90% of second trimester urine samples in a US pregnancy study. The Endocrine Society says the classic toxicology rule — the dose makes the poison — does not hold for hormone-disrupting chemicals. Low doses can produce effects that high doses do not predict. There may be no safe level of exposure. The doctors close with a setup for Part 2: what can actually be done, what works, and what is wishful thinking. The key message: the absence of proven harm is not the same as a clean bill of health. Chapters: 00:00 Intro – Forever Chemicals and GMOs Are Not the Same Problem 01:57 What Are PFAS? The Carbon Fluorine Bond That Won't Break 03:23 The EPA's Position — No Known Safe Level for the Two Main PFAS 03:39 The National Academies 2022 Report — What the Evidence Actually Shows 04:42 Specific Studies — Liver Cancer, Testicular Cancer, and the Pattern That Isn't Noise 05:58 Where PFAS Gets Into the Body — Water, Seafood, and Packaging 08:38 The Packaging Problem — Paper Straws, Molded Fiber Bowls, and Cake Mix 09:44 Sewage Sludge, Biosolids, and Contaminated Land 10:23 Dr. Ben's Ranch — Reverse Osmosis and What Actually Filters PFAS 12:26 FDA Win — Grease-Proofing PFAS Out of New US Food Packaging 15:13 GMOs — What the Big Reviews Actually Said and What They Didn't 16:04 Substantial Equivalence — A Regulatory Concept, Not a Long-Term Study 17:16 The 2016 National Academies Report Called for More Monitoring. That's Not Settled Science. 17:51 CRISPR — The Moving Target the Safety Framework Is Still Chasing 19:04 Glyphosate — The Chemical Load That Travels With Modern Food 20:32 The Endocrine Society — Why the Dose Makes the Poison Rule Doesn't Apply Here 21:30 Timing Matters More Than Amount — Fetal Development and Hormonal Windows 21:52 Glyphosate in 75% of the US Population and 90% of Pregnant Women 23:30 The Real Thesis — Synthetic Molecules, Never Tested Together, Against the Wrong Framework 24:17 Closing — Part 2 Next Week: What You Can Actually Do If you enjoyed this episode, make sure to subscribe, rate, and review it on Apple Podcasts, Spotify, and YouTube Podcasts.