Bacon, nitrate and cancer

• Beetroot has about 40 times the nitrate of bacon; the cancer question concerns nitrosamines formed from nitrite.
• In a 1991 experiment, more than 4,000 rats drank nitrosamines for roughly 2.5 years and developed liver and oesophageal tumours. The lowest carcinogenic cumulative dose was about 9 mg/kg. [1]
• The "bacon equivalent" calculation equates the rat dose to 126,000 kg of bacon over 2.5 years for a 70 kg human, or 138 kg per day, far beyond ordinary intake.
• Rats are unusually sensitive to these nitrosamines: mice and hamsters needed about five times the exposure, and human liver DNA-repair activity is about 8-10 times higher than in rats. Endogenous nitrosamine production is equivalent to roughly 200 kg of bacon daily; credible evidence of nitrosamine-caused human cancer is lacking.
• "No added nitrate" bacon commonly uses celery powder, whose nitrate is converted by added bacteria such as Staphylococcus into nitrite; the resulting curing chemistry is the same as conventional bacon.
• Oral bacteria convert salivary nitrate into biologically active nitrite that helps lower blood pressure; antibacterial mouthwash may disrupt that pathway.
• Nitrosamine exposure from bacon can be reduced with ventilated cooking below about 160°C, including air frying, and by discarding rendered grease, where they concentrate. Many evaporate during cooking; microwaving is another option.
• A 2007 study of 27 ileostomy patients found that adding 1 g vitamin C or vitamin E during red/processed-meat feeding did not significantly reduce measured N-nitroso compounds in ileal output. American bacon already requires added antioxidants such as vitamin C. [2]

Vitamin C, organ meat and the historical meat-only experiment

• Meat contains vitamin C, particularly organ meat. In the 1953 Sheffield vitamin-C deprivation experiment with about 20 people, 10 mg daily prevented or reversed scurvy; intake recommendations are higher: initially 30 mg, now 45 mg in Australia and 90 mg for US men or 75 mg for women. [3]
• About 40 g pork liver or 43 g lamb liver supplies 10 mg vitamin C; spleen and lung are richer still, while obtaining that much from muscle meat could need up to 1 kg. A modest quantity of offal increases vitamin C intake on carnivore.
• Vilhjalmur Stefansson lived with Arctic peoples for 11 years and said he spent more than five years eating only meat and water; contemporary physicians expected meat-only diets to cause scurvy, kidney damage, hypertension and other disease.
• In a supervised follow-up, Stefansson ate only meat for 375 days and Karsten Andersen for 367, initially under hospital observation and subsequently monitored through ketones. No vitamin deficiencies or kidney deterioration emerged; Andersen's blood pressure went from 140/80 to 120/80. [4]
• Their diet included liver, kidney, brain, marrow and substantial fat, not just lean muscle. Roughly 40 g of liver daily could supply the minimum vitamin C needed to avoid scurvy alongside other animal foods.
• During a lean-meat phase of the experiment, Stefansson developed weakness, nausea and diarrhoea within a week, then recovered rapidly when fat was restored. On modern carnivore diets, inadequate fat can contribute to diarrhoea; increasing fat has helped some patients. [4]
• Higher-fat carnivore choices include 18-20%-fat mince, marbled or fattier cuts with fat retained, and tallow or lard added to leaner foods.
• Amber O'Hearn connects vitamin C-dependent carnitine synthesis with dietary meat carnitine, potentially reducing the need for vitamin C in that pathway. Animal experiments also connect carnitine deficiency with fatigue and weakness resembling some scurvy symptoms.
• Vitamin C also functions as an antioxidant, and meat provides other antioxidants such as B12. In a 1993 guinea-pig experiment without vitamin C, controls died at 21-22 days, whereas animals given glutathione ester survived to day 40, indicating that other antioxidants can affect outcomes during deficiency. [5]
• Vitamin C blood samples degrade rapidly without proper collection and transport; falsely low laboratory results can therefore occur.
• Scurvy on ketogenic diets is possible: published cases involve children with epilepsy or autism on restricted, inadequately supplemented diets. Vitamin C intake depends on diet composition, organ foods and fresh-meat juices; adequate vitamin C cannot be assumed for every keto or carnivore diet. [6][7][8]

HbA1c, glucose spikes and insulin physiology

• Blood donation can lower measured HbA1c by increasing the proportion of young red blood cells, even without lower glucose, because HbA1c depends on glucose exposure over each cell's roughly 120-day lifespan.
• Reticulocyte counts assess red-cell turnover, and two stable haemoglobin measurements four to six weeks apart help determine whether changing cell production affects HbA1c.
• Glucose falling from about 15 to below 5 mmol/L after three days of low-carbohydrate, one-meal-a-day eating is plausible for blood glucose but not as an equivalent three-day HbA1c reversal; glucose can change rapidly with fasting and carbohydrate restriction.
• Insulin and sulfonylurea use requires medical supervision during major carbohydrate restriction or fasting because unchanged doses can cause dangerous, potentially fatal hypoglycaemia.
• An active viewer has HbA1c around 5.5%, normal fasting glucose and a 12-15 mmol/L rise after a sandwich. A slice of bread contains roughly 15 g carbohydrate whereas circulating blood holds only about 4-5 g glucose; post-meal insulin responses are relevant even with normal fasting values.
• Weight gain alongside these spikes can fit insulin resistance, where muscle and liver respond poorly to insulin but adipose tissue still stores energy. High glucose with inadequate insulin can indicate insulin deficiency, including autoimmune diabetes, often associated with weight loss.
• A Kraft-style oral glucose-tolerance test measuring insulin alongside glucose separates high-insulin resistance from low-insulin production. Some people diagnosed with type 2 diabetes have an autoimmune component and may need insulin even with ketogenic eating.
• A 2013 study followed about 400 nondiabetic Japanese Americans for around 10 years: those whose insulin peaked at 30 minutes had 3.2% diabetes incidence versus 47.8% when it peaked at 120 minutes, roughly a twelvefold adjusted odds ratio. [9]
• Continuous glucose monitors are useful for relative rises and recovery patterns but can be unreliable for absolute glucose, so finger-prick testing helps confirm readings. A brief rise to about 8 mmol/L after oatmeal differs from a prolonged elevation.
• Spike size depends on portion, muscle mass, exercise, glycogen reserves, gastric emptying and food order; one reading cannot identify the mechanism by itself.

Diet shifts and liver enzymes

• A viewer moved from carnivore to vegan after unfavourable bloodwork. Higher carbohydrate consumption may increase triglycerides and ALT, while dietary change alone cannot explain every illness or laboratory abnormality.
• Carnivore eating does not eliminate infections or other causes of symptoms and abnormal tests.
• Elevated ALT need not always result from fatty liver or damaged liver cells. Excess glucose metabolism can increase mitochondrial pyruvate, conversion to alanine and ALT activity; elevated ALT has occurred in some vegan patients.

Uric acid, ketosis and gout

• A viewer on carnivore for 18 months reduced allopurinol, then saw uric acid rise from 299 to around 600 without another gout attack. High urate alone is not the same as symptomatic gout.
• During ketosis, renal ketone clearance competes with urate excretion, potentially increasing blood urate; the rise can settle over roughly four to six weeks, with individual variation.
• In a 2019 12-week ketogenic-diet study of 35 overweight or obese adults, uric acid moved downward by the end of the intervention. High urate during carnivore eating has not necessarily coincided with gout attacks in clinical observations. [10]

Dental infection and unexplained IgE elevation

• A patient with otherwise unremarkable tests has elevated IgE and an abscessed tooth scheduled for extraction. A hidden dental infection may contribute to elevated IgE.
• In a 1984 dental-abscess investigation, IgE fell after dental intervention in seven of eight patients with before-and-after samples. [11]
• A 2019 pilot randomized study of 10 children aged 6-16 with gingivitis and dust-mite allergy compared periodontal scaling and root planing in five children with five controls; six months later IgE fell in all five who received the procedure. [12]
• A panoramic dental X-ray may find only about a third of occult infections; intraoral films around half and cone-beam CT about 90%. Cone-beam CT radiation is roughly three to six weeks of natural background exposure. The patient's IgE can be monitored after extraction.

Maternal anaemia and infant brain development

• An observational study of 394 South African mother-infant pairs used repeat MRI scans from three months to two years. Infants of anaemic mothers had brains about 4% smaller at 12 months and 6% smaller at 24 months; this association does not prove causation. [13]
• Iron contributes to brain development and synthesis of neurotransmitters such as dopamine and serotonin; trials in selected groups have linked iron supplementation to higher IQ. Anaemia can also arise through B12 deficiency, which affects neurological development.

Antifungal therapy in inflammatory bowel disease

• A 2026 study compared oral nystatin with systemic fluconazole for patients with Crohn's disease or ulcerative colitis and oral Candida albicans; the fluconazole group had more favourable microbiome changes and some improvement in bowel disease activity. [14]
• Nystatin and amphotericin B are poorly absorbed and usually act locally, limiting systemic adverse effects. Fluconazole acts systemically and may be used more often in patients with both inflammatory bowel disease and Candida, with systemic adverse-effect potential.
• The study compared nystatin with fluconazole, not a combination. Combining topical and systemic drugs may be feasible without evident harm, but the study did not evaluate that approach.
• Azoles inhibit fungal ergosterol synthesis and can interfere with human cholesterol synthesis. Dietary cholesterol absorption continues; cholesterol-rich foods such as prawns and eggs are used alongside fluconazole in this practice, with fewer observed side effects, without providing fungal ergosterol.
• Blood LDL measurements concern lipoprotein particles containing cholesterol, other lipids and proteins, not isolated cholesterol molecules; LDL and cholesterol are distinct entities.

Video-production clarification

• Both speakers are real people. Riverside software uses AI eye-contact correction when speakers look at one another on screens rather than the camera; this enhancement may make their faces look artificial.

References

1. [01:24] Effects on 4080 Rats of Chronic Ingestion of N-Nitrosodiethylamine or N-Nitrosodimethylamine: A Detailed Dose-Response Study — https://aacrjournals.org/cancerres/article/51/23_Part_2/6415/497270/Effects-on-4080-Rats-of-Chronic-Ingestion-of-N
2. [08:14] The effect of haem in red and processed meat on the endogenous formation of N-nitroso compounds in the upper gastrointestinal tract — https://doi.org/10.1093/carcin/bgl192
3. [10:36] The Sheffield Experiment on the Vitamin C Requirement of Human Adults — https://doi.org/10.1079/PNS19530054
4. [14:46] Clinical Calorimetry: XLV. Prolonged Meat Diets with a Study of Kidney Function and Ketosis — https://doi.org/10.1016/S0021-9258(18)76842-7
5. [22:52] Glutathione ester delays the onset of scurvy in ascorbate-deficient guinea pigs — https://doi.org/10.1073/pnas.90.1.317
6. [25:12] Case report: scurvy in an epileptic child on a ketogenic diet with oral complications — https://doi.org/10.1007/BF03262627
7. [25:12] No Longer A Historical Ailment: Two Cases of Childhood Scurvy with Recommendations for Bone Health Providers — https://doi.org/10.1007/s00198-019-05264-4
8. [25:12] Florid Scurvy in an Autistic Child on a Ketogenic Diet — https://doi.org/10.1097/PEC.0000000000001695
9. [38:24] Patterns of Insulin Concentration During the OGTT Predict the Risk of Type 2 Diabetes in Japanese Americans — https://doi.org/10.2337/dc12-0246
10. [49:25] Weight loss, improved physical performance, cognitive function, eating behavior, and metabolic profile in a 12-week ketogenic diet in obese adults — https://doi.org/10.1016/j.nutres.2018.11.007
11. [52:47] Concentrations of Immune Complexes, IgG, IgM, IgE, and C3 in Patients with Acute Apical Abscesses — https://doi.org/10.1016/S0099-2399(84)80262-9
12. [53:13] Effect of scaling and root planing on level of immunoglobulin E and immunoglobulin G4 in children with gingivitis and house-dust mite allergy: A pilot randomised controlled trial — https://doi.org/10.1142/S2214607519500020
13. [56:33] Antenatal maternal anaemia and infant brain structure: high-field (3 T) and ultra-low-field (64 mT) MRI findings from South Africa — https://doi.org/10.1093/braincomms/fcag318
14. [59:06] Antifungal therapy improves microbiome dynamics in inflammatory bowel disease — https://doi.org/10.1038/s41591-026-04616-y