✶ Written by an AI · fact-checked before publication
Every claim in Are Seed Oils Actually Poisoning You?, checked
This is the book's verification ledger, published in full. Every factual claim was extracted from the manuscript and handed to an independent blind checker — one claim, its cited source, nothing else. High-stakes claims (doses, safety, real diseases, trial numbers) were checked by three checkers who had to agree. Every checker first had to confirm the cited source actually exists.
48claims checked
48verified first pass
0flagged & corrected
| id | claim as written | stakes | first-pass verdict |
|---|---|---|---|
| C01 | the "hateful eight": "canola, corn, cottonseed, soybean, sunflower, safflower, grapeseed and rice-bran"; "What they share … is a fatty acid called omega-6 linoleic acid | low | verified |
| C02 | Health panics are almost never built on a lie. They're built on a true, narrow finding stretched far past what it actually showed. | low | verified |
| C03 | Seven of those eight share the trait … rich in a single omega-6 polyunsaturated fat called linoleic acid, and linoleic acid is the molecule nearly every fear on the scorecard is really pointing at | low | verified |
| C04 | Linoleic acid is an essential omega-6 polyunsaturated fatty acid — your body can't make it, you have to eat it — and it genuinely is the dominant PUFA in most of these oils | low | verified |
| C05 | it can be converted, step by step, into arachidonic acid. And arachidonic acid is the raw material for a family of signalling molecules called eicosanoids — some of which are, yes, pro-inflammatory | high | verified |
| C06 | in controlled human feeding trials, raising linoleic-acid intake does not substantially raise the arachidonic-acid levels in your blood or tissues | high | verified |
| C07 | higher linoleic-acid intake did not raise them [C-reactive protein, interleukin-6] … Not a little. The pooled result was a null. | high | verified |
| C08 | heating them … genuinely does generate oxidation products, including reactive aldehydes such as 4-HNE and 4-HHE, along with other polar compounds … it rises with the temperature, with how long the oil is held hot, and with how many times the same oil gets reused | high | verified |
| C09 | The highest reported aldehyde and polar-compound concentrations come from prolonged, high-heat, repeated-reheating setups — not from single-use domestic cooking | high | verified |
| C10 | we do not have the clinical or epidemiological evidence establishing that normal household use of seed oils causes disease via cooking-generated aldehydes | high | verified |
| C11 | Reused, thermally degraded frying oil … is a recognised food-quality concern, and it's a genuinely different thing from a fresh bottle | high | verified |
| C12 | The ratio in the modern food supply really has shifted toward omega-6, driven substantially by how much more omega-6 we now eat | low | verified |
| C13 | Your omega-3 status — how much EPA and DHA actually sits in your tissues — is driven mainly by how much omega-3 you take in … largely independent of your omega-6 intake | high | verified |
| C14 | In humans, eating more linoleic acid … does not meaningfully push omega-3s out of your tissues | high | verified |
| C15 | a science advisory from a major cardiovascular body … declined to support it … omega-6 PUFA intake is *associated with lower* cardiovascular risk, not higher | high | verified |
| C16 | The refined, pressed, solvent-extracted oils … went from niche to everywhere across the twentieth century, and consumption really did rise sharply over that same stretch | low | verified |
| C17 | We ate linoleic acid — the exact molecule at the centre of this whole panic — for a very long time, from nuts, from seeds, from grains, from the fat of the animals we hunted | low | verified |
| C18 | Total calories available per person went up. Ultra-processed food went from rare to dominant. Added sugar climbed. Cars replaced walking … Every one of those lines is climbing or moving right alongside the seed-oil line. | low | verified |
| C19 | Most seed oils really are extracted using hexane, an industrial solvent, and then refined, bleached and deodorised before bottling | low | verified |
| C20 | Residual hexane in the finished, refined oil is present only in trace amounts. It's subject to regulatory limits, and the residues that get measured sit far below any level of established toxicological concern. | high | verified |
| C21 | Pasteurisation is aggressive heat treatment, and it's one of the great public-health wins … Fortification — adding folate to flour, iodine to salt — is industrial tinkering that has prevented an enormous amount of disease. Milling grain, fermenting, freezing … none of it toxic by virtue of being processing. | high | verified |
| C22 | swapping saturated fat for polyunsaturated fat, linoleic acid included, lowers LDL cholesterol | high | verified |
| C23 | When you replace saturated fat with polyunsaturated fat in these trials and follow people for actual cardiovascular events — heart attacks, not just cholesterol numbers — the event rate goes down | high | verified |
| C24 | Higher linoleic-acid intake, and higher linoleic-acid actually measured in the blood, track with lower rates of cardiovascular disease and type 2 diabetes | high | verified |
| C25 | is there evidence that seed oils are *uniquely* fattening compared with other fats, calorie for calorie? There is not … What actually drives obesity is total energy balance and the overall shape of the diet | high | verified |
| C26 | Obesity tracks energy balance, not one oil | high | verified |
| C27 | Replacing polyunsaturated fat with saturated fat tends to raise your LDL cholesterol … it's a causally established risk factor for cardiovascular disease | high | verified |
| C28 | Rigid dietary restriction and obsessive avoidance of 'impure' foods are recognised features of disordered eating, including orthorexia | high | verified |
| C29 | Familial hypercholesterolaemia … an inherited condition that pushes cholesterol high from early in life and needs proper clinical assessment and management, regardless of anyone's cooking choices | high | verified |
| C30 | A clinician works out cardiovascular risk from absolute risk: your lipids, your blood pressure, your history, your age, the whole picture together — not by ruling a single ingredient in or out | high | verified |
| C31 | Chest pain, pressure or tightness — especially when it comes on with exertion — and breathlessness that's new or getting worse are reasons to seek care promptly" (+ the consolidated red-flag list: unexplained weight change, persistent change in bowel habit, any sudden severe reaction = emergency) | high | verified |
| C32 | True food allergy and intolerance are real, diagnosable, and different in kind from being frightened of a category … any acute, severe reaction after eating is an emergency | high | verified |
| C33 | Diets built on vegetables, legumes, whole and minimally processed foods, fish, and unsaturated fats — the Mediterranean-style pattern being the best-studied … track with better heart and metabolic outcomes across trials and large cohorts | high | verified |
| C34 | In controlled trials, swapping saturated fat for polyunsaturated fat improves blood lipids and lowers cardiovascular risk | high | verified |
| C35 | Fried food and ultra-processed food are energy-dense and very easy to over-eat, and that … is where the weight sits, not in the particular molecule the frying happened in | high | verified |
| C36 | Which cooking oil you use is a small line in your diet next to your overall pattern, your total intake, and how much fried and ultra-processed food you eat | high | verified |
| C37 | the remaining oil is washed out with hexane because it pulls oil from seed far more efficiently than pressing alone | low | verified |
| C38 | Australia's advertising rules for health practitioners mean a doctor's name cannot be used to help sell a product" (repeated in About James: "a doctor's name can't be used to help sell a product") | high | verified |
| C39 | fat carries more energy per gram than protein or carbohydrate | low | verified |
| C40 | people with more linoleic acid in their blood tend to have lower rates of heart disease and diabetes | high | verified |
| C41 | An entire corner of the grocery store now sells 'seed-oil-free' at a premium. There's a certification seal for it. | low | verified |
| C42 | oils table: corn/cottonseed/soybean/sunflower/safflower/grapeseed/rice-bran each "High-linoleic-acid seed oil"; "Canola \ | low | verified |
| C43 | smoke point … is closer to a marketing figure than a toxicity line. The temperature at which an oil starts to visibly smoke is not the temperature at which it turns into poison. | high | verified |
| C44 | Oils differ in how readily they oxidise — their oxidative stability isn't identical. | low | verified |
| C45 | omega-6 and omega-3 fatty acids do share some of the same metabolic enzymes, the same conversion pathways in the body | high | verified |
| C46 | an omega-6 to omega-3 ratio near 1:1. The modern diet, flooded with seed oils, runs that ratio out to 15:1, maybe 20:1." (stated as the fear's framing) | high | verified |
| C47 | adding folate to bread, a modern industrial intervention that prevents serious birth defects | high | verified |
| C48 | the famous 1:1 ancestral omega ratio … It's an estimate, reconstructed from fragmentary evidence about diets nobody measured. | low | verified |
Ledger exported 2026-07-29. Found something we still got wrong? Tell us — corrections happen in the open. How the books are made: the honest method.