Dr Paul Mason obtained his medical degree with honours from the University of Sydney, and also holds degrees in Physiotherapy and Occupational Health. He is a Specialist Sports Medicine and Exercise Physician.
Dr Mason developed an interest in low carbohydrate diets in 2011. Since then he has spent hundreds of hours reading and analysing the scientific literature. For a number of years Dr. Mason has been applying this knowledge in treating metabolic and arthritis patients who have achieved dramatic and sustained weight loss and reductions in joint pain.
Dr. Mason is also the Chief Medical Officer of Defeat Diabetes, Australia's first evidence-based and doctor-led program that focuses on the wide range of health benefits of a low carb lifestyle, particularly for those wanting to send into remission pre-diabetes, type 2 diabetes, and other metabolic illnesses.
summerizer
B12 and child safety
- Vegan diets are promoted as healthy and ethical, but the nutrient realities can make them dangerous.
- Children can suffer severe outcomes on unsupplemented vegan diets without medical supervision, blood tests, and adequate nutrient planning.
- Plant foods do not provide adequate B12 unless fortified, and liver B12 stores only delay deficiency for years.
- A balanced vegan diet means fortified foods or B12 supplements, and B12 deficiency remains common among vegetarian groups.
- Animal foods provide B12 plus DHA, EPA, creatine, heme iron, choline, taurine, zinc, and fat-soluble vitamins that vegan diets struggle to supply.
Science quality and red meat
- Observational nutrition research produces associations, not causation, and food-frequency questionnaires add recall and classification error.
- Confounding and healthy-user bias make meat-avoidance headlines weak without randomized trials.
- Systematic reviews depend on included-study quality, and surrogate markers such as LDL can detach from meaningful clinical outcomes.
- The LDL mortality review in older adults rejects LDL as a reliable nutrition surrogate.
- The 2015 WHO/IARC red-meat cancer release relies on observational work and carcinogen-injected rat experiments.
- The EAT-Lancet diet links back to that IARC work while severely limiting red-meat intake.
Brain nutrients and bioavailability
- DHA and EPA are absent from plants, and ALA conversion is too small to protect brain development.
- DHA trials, creatine trials, and iron trials connect animal-source nutrients with cognition, memory, behavior, and child development.
- Heme iron, retinol, and vitamin D3 have better real-world bioavailability than the plant forms named in the talk.
- Plant anti-nutrients such as phytates, oxalates, tannins, and glucosinolates can block mineral absorption.
- Meat contains vitamin C, and historical Arctic, Antarctic, and military scurvy examples fit that reality.
Evolution and anatomy
- Soil and manure are not credible B12 sources, and vegan comparative-anatomy tables rely on false premises.
- Human saliva enzymes, stomach acidity, colon size, and great-ape opportunistic meat eating support an omnivorous anatomy.
Animals and agriculture
- Grain agriculture kills animals through harvest, predation after cover loss, machinery, plowing, and rodent poisons.
- Mouse counts, freezing behavior, plague densities, and poison lethality challenge the idea of a death-free vegan diet.
- Intent does not erase responsibility for deaths embedded in crop production.
Environment and land
- Monocropping drives soil erosion, microbial disruption, biodiversity loss, pesticide dependence, and nutrient decline in crops.
- Ruminant grazing builds soil through perennial grasses, root turnover, biomass, and carbon storage.
- Livestock land-use figures narrow once marginal land that cannot be cropped is separated out.
- Livestock water use must separate green rainwater from blue freshwater, because crop irrigation carries the blue-water burden.
Pesticides and glyphosate
- Pesticide use follows monocrop dependence, glyphosate-resistant weeds, grain residues, and residue concerns in cattle and humans.
- Glyphosate-related cues include preharvest wheat spraying, FSANZ food detections, Clostridium botulinum, cattle tissues, urine levels, organic-food differences, and chronic illness association.
Closing
- Animal foods make the stronger case; weak nutrition research does not justify red-meat demonization, and no diet avoids death.
References
- [00:02] The Nobel Prize in Physiology or Medicine 1934 — https://www.nobelprize.org/prizes/medicine/1934/summary/
- [00:04] How prevalent is vitamin B12 deficiency among vegetarians? — https://doi.org/10.1111/nure.12001
- [00:10] Lack of an association or an inverse association between LDL-C and mortality in the elderly: a systematic review — https://doi.org/10.1136/bmjopen-2015-010401
- [00:11] Carcinogenicity of consumption of red and processed meat — https://doi.org/10.1016/S1470-2045(15)00444-1
- [00:13] Beef Meat and Blood Sausage Promote the Formation of Azoxymethane-Induced Mucin-Depleted Foci and Aberrant Crypt Foci in Rat Colons — https://doi.org/10.1093/jn/134.10.2711
- [00:14] Beef meat promotion of dimethylhydrazine-induced colorectal carcinogenesis biomarkers is suppressed by dietary calcium — https://doi.org/10.1017/S0007114507843558
- [00:14] Food in the Anthropocene: the EAT-Lancet Commission on healthy diets from sustainable food systems — https://doi.org/10.1016/S0140-6736(18)31788-4
- [00:18] Maternal supplementation with very-long-chain n-3 fatty acids during pregnancy and lactation augments children's IQ at 4 years of age — https://doi.org/10.1542/peds.111.1.e39
- [00:20] Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial — https://doi.org/10.1098/rspb.2003.2492
- [00:20] Effects of creatine supplementation on cognitive function of healthy individuals: A systematic review of randomized controlled trials — https://doi.org/10.1016/j.exger.2018.04.013
- [00:20] A double-masked, randomized control trial of iron supplementation in early infancy in healthy term breast-fed infants — https://doi.org/10.1067/S0022-3476(03)00301-9
- [00:21] Effects of iron supplementation of low-birth-weight infants on cognition and behavior at 7 years: a randomized controlled trial — https://doi.org/10.1038/pr.2017.235
- [00:22] Randomised study of cognitive effects of iron supplementation in non-anaemic iron-deficient adolescent girls — https://doi.org/10.1016/S0140-6736(96)02341-0
- [00:22] Iron treatment normalizes cognitive functioning in young women — https://doi.org/10.1093/ajcn/85.3.778
- [00:24] The Efficacy and Safety of Vitamin C for Iron Supplementation in Adult Patients With Iron Deficiency Anemia: A Randomized Clinical Trial — https://doi.org/10.1001/jamanetworkopen.2020.23644
- [00:24] Iron absorption from legumes in humans — https://doi.org/10.1093/ajcn/40.1.42
- [00:25] Comparison of vitamin D2 and vitamin D3 supplementation in raising serum 25-hydroxyvitamin D status: a systematic review and meta-analysis — https://doi.org/10.3945/ajcn.111.031070
- [00:32] Midbrain circuits for defensive behaviour — https://doi.org/10.1038/nature17996
- [00:33] The effects of harvest on arable wood mice Apodemus sylvaticus — https://doi.org/10.1016/0006-3207(93)90060-E
- [00:35] Field Deaths in Plant Agriculture — https://philarchive.org/archive/FISFDI
- [00:36] Key messages | Global Symposium on Soil Erosion — https://www.fao.org/about/meetings/soil-erosion-symposium/key-messages/en/
- [00:37] Changes in USDA food composition data for 43 garden crops, 1950 to 1999 — https://doi.org/10.1080/07315724.2004.10719409
- [00:38] Livestock: On our plates or eating at our table? A new analysis of the feed/food debate — https://doi.org/10.1016/j.gfs.2017.01.001
- [00:40] A Global Assessment of the Water Footprint of Farm Animal Products — https://doi.org/10.1007/s10021-011-9517-8
- [00:41] Pesticides use, pesticides trade and pesticides indicators: Global, regional and country trends, 1990-2020 — https://openknowledge.fao.org/bitstreams/78705276-3455-4c70-ac77-3082095f83b3/download
- [00:43] The Effect of Glyphosate on Potential Pathogens and Beneficial Members of Poultry Microbiota In Vitro — https://doi.org/10.1007/s00284-012-0277-2
- [00:43] Glyphosate suppresses the antagonistic effect of Enterococcus spp. on Clostridium botulinum — https://doi.org/10.1016/j.anaerobe.2013.01.005
- [00:44] Detection of Glyphosate Residues in Animals and Humans — https://doi.org/10.4172/2161-0525.1000210
Logical fallacies called out in the talk
- [01:45] False premise — plant foods contain usable B12.
- [03:48] Euphemism / hidden premise — “well-balanced vegan diet” hides mandatory supplementation.
- [06:21] Correlation-causation fallacy — observational association used as proof of causation.
- [07:25] False precision — food-frequency questionnaires treated as reliable dietary evidence.
- [08:07] Confounding error — hamburger outcomes blamed on meat while fries, soda, and lifestyle variables remain mixed in.
- [08:34] Healthy-user bias — meat avoidance confused with better outcomes from broader health-conscious behavior.
- [09:56] Garbage-in, garbage-out — systematic reviews treated as strong even when included studies are weak.
- [10:28] Surrogate-marker fallacy — LDL used as a substitute for meaningful outcomes such as mortality.
- [11:48] Weak-evidence overreach — red meat treated as causing bowel cancer from weak observational evidence.
- [13:12] Animal-model overreach — carcinogen-injected rat experiments used as evidence against normal human red-meat consumption.
- [15:04] Citation laundering — weak WHO/IARC evidence reused by EAT-Lancet as if it were settled proof.
- [16:19] Image/implication fallacy — “plant-based = brain healthy” messaging despite nutrient risks to brain development.
- [17:16] Nutrient-equivalence fallacy — plant ALA treated as equivalent to animal DHA/EPA.
- [24:29] Rescue fallacy — vitamin C assumed to fix poor non-heme iron absorption.
- [24:04] Nutrient-amount fallacy — plant iron counted without accounting for bioavailability.
- [25:00] Form-equivalence fallacy — plant vitamin A/D forms treated as equivalent to animal retinol/D3.
- [26:00] Whole-food absorption fallacy — plant nutrients treated as available while antinutrients block absorption.
- [28:03] Argument from missing data — beef treated as vitamin-C-free because USDA values listed zero without measuring it.
- [30:33] Meat-scurvy myth — meat-heavy diets treated as causing scurvy.
- [30:43] Evolutionary falsehood — humans treated as not evolved to eat meat.
- [31:04] Ad hoc rescue — pre-agricultural humans supposedly got B12 from accidental soil/manure ingestion.
- [31:19] Cherry-picked anatomy / false comparison — comparative-anatomy tables used to make humans look herbivorous.
- [32:25] Death-free diet fallacy — vegan diets treated as good for animals while crop deaths are omitted.
- [33:05] Evasion-by-agility fallacy — mice assumed to escape harvesters because they are agile.
- [35:00] Intentions-over-consequences fallacy — lack of intent treated as reduced responsibility for crop deaths.
- [38:43] Land-use equivocation — livestock land use treated as croppable land use.
- [40:06] False trend — livestock land use treated as increasing.
- [40:22] Water-use equivocation — livestock “water use” treated as blue freshwater depletion while mostly green rainwater is counted.
[03:48] “The phrase ‘well-balanced’ is really code for ‘needs supplementing.’”
[05:18] “How can a vegan diet possibly be the healthiest diet for humankind when, without artificial supplementation, it will eventually kill you?”
[19:25] “To anyone with a child on a plant-based diet, please give them a good quality DHA supplement, not flaxseed oil.”
[45:58] “Finally, understand there is no such thing as a diet for which nothing has died.”
Given that 40% of people experiencing b12 deficiency can have normal b12 blood work, would you recommend to other vegans not to supplement as well?
https://doi.org/10.3390/jcm13082176 - Diagnosis, Treatment and Long-Term Management of Vitamin B12 Deficiency in Adults: A Delphi Expert Consensus
You can have b12 deficiency while on a meat diet too, It an inability to absorb it. Your doctor will check it you have deficiency symptoms.
That's a non sequitur - it doesn't follow. People are born with all sorts of disabilities, that doesn't mean we're all going to get them. Eating a diet with some B12, etc in it is going to give you a better chance of not experiencing deficiency symptoms. Eating a diet with no B12, etc in it is going to give you a better chance of experiencing those symptoms.
If you're unwilling to eat foods that supply adequate nutrition (see also https://aussie.zone/post/33263844) you really should supplement. If you include sufficient supplementation your plant based diet is fine.
(I eat only meat, your appropriate uneducated reply should be that I shall inevitably get scurvy as meat has no vitamin C and no one thinks beef has enough ascorbic acid. To save you the trouble here's why: https://aussie.zone/post/33171728)
Thus your position is vegans should not supplement unless recommended by a doctor?
Update - What I'm trying to do is identify the "bad advice" and "quack science" you initially complained about. So a medical doctor recommending vegans supplement is the "bad advice"?