Neurosurgeon and carnivore advocate Dr. Anthony Chaffee challenges everything you think you know about healthy eating and fertility. He reveals how plants contain natural carcinogens and toxins that create inflammation and hormonal disruption, while a meat-based diet optimizes fertility by providing essential cholesterol for hormone production and eliminating inflammatory compounds.
Neurosurgery and Functional Medicine
Key Insights
Actionable Advice
Dr. Chaffee reveals shocking research showing that plants naturally contain thousands of toxins and carcinogens as defense mechanisms. Brussels sprouts alone contain 136 known human carcinogens, and these naturally occurring poisons outweigh pesticides by a factor of 10,000. This challenges everything we've been taught about 'healthy' vegetables and their impact on our fertility and overall health.
High insulin levels from carbohydrate consumption directly block the conversion of testosterone to estrogen in women's ovaries, leading to PCOS — the number one cause of infertility. Dr. Chaffee explains the 27-step process by which cholesterol becomes reproductive hormones and why eliminating carbs can restore this delicate balance essential for conception.
Contrary to decades of medical advice, cholesterol is essential for fertility as it forms the building blocks of all reproductive hormones. Dr. Chaffee shares evidence of men in their 50s and 60s increasing testosterone by 30-40% within three months simply by increasing their cholesterol and fat intake, demonstrating the power of proper nutrition for hormonal optimization.
Dr. Chaffee outlines his simple protocol: eat fatty meat until satisfied, drink water to thirst, and avoid all plants, sugar, and artificial substances. He explains how this approach naturally regulates appetite and provides all essential nutrients while eliminating the inflammatory compounds that disrupt fertility and overall health.
“High insulin levels will actually block that process, so you'll block conversion. So you'll actually have too much testosterone, not enough estrogen. And obviously, that's going to be a problem when you're trying to conceive PCOS, polycystic ovarian syndrome. That's actually the number one cause of infertility in women.”
— Dr. Anthony Chaffee▶ 47:39
Dr. Chaffee explains that high insulin from carbohydrates blocks the conversion of testosterone to estrogen in women's ovaries, which is a major cause of PCOS — the number one cause of infertility. A carnivore diet eliminates carbs and provides the cholesterol needed for hormone production.
“Plants are living organisms and they like to stay living organisms, and so if you eat them, they die. And so all living organisms have a defense against being eaten and being killed because nature's wild. Plants can't run away, so they have to use toxins and being physically poisonous.”
— Dr. Anthony Chaffee▶ 6:01
Dr. Chaffee explains that all plants use toxins as defense mechanisms since they can't run away. Research from Berkeley shows plant toxins outweigh pesticides by 10,000 times, with vegetables like Brussels sprouts containing 136 known carcinogens. These toxins create inflammation and disrupt hormones.
“Cholesterol is a very, very, very important molecule. Every single cell in our body, the cell membrane is cholesterol. Our brains are made out of cholesterol. Almost all of our hormones are made out of cholesterol. You have cholesterol and the end result is testosterone and estrogen. There's twenty seven steps in between.”
— Dr. Anthony Chaffee▶ 33:30
Dr. Chaffee explains that every cell membrane is made of cholesterol, and all hormones including testosterone and estrogen are made from cholesterol through 27 different steps. Without adequate cholesterol, your body can't produce the hormones necessary for conception and fertility.
“You really just eat meat, drink water, be happy. That's it. Salt to taste if you want. You can have some dairy sometimes, but I would avoid anything with lactose because that has enough carbohydrates in it to raise your blood sugar and raise your insulin.”
— Dr. Anthony Chaffee▶ 46:58
Dr. Chaffee recommends eating only fatty meat until full, drinking water to thirst, and avoiding all plants, sugar, and artificial substances. He emphasizes the importance of fat content and suggests salt to taste. The diet should be as simple as possible — just meat and water.
“Three ounces of soy, over a million. Right? So this is really going to mess with your system. It needs to be in balance with your other hormones like progesterone in order to be fertile and to stimulate a follicle and have that follicle be viable and implant in your womb.”
— Dr. Anthony Chaffee▶ 36:07
Dr. Chaffee reveals that plant phytoestrogens contain far more estrogen than animal products — three ounces of soy has over one million nanograms of estrogen compared to only 3.9 nanograms in hormone-treated meat. This massive difference can severely disrupt hormonal balance needed for fertility.
Dr. Chaffee's simple approach to implementing a carnivore diet to optimize hormones and fertility
Eliminate all plants
Remove all vegetables, fruits, grains, legumes, nuts, seeds, and plant-based foods from your diet
Eat only fatty meat
Choose fatty cuts of beef, lamb, pork, and other animal products. Avoid lean meats as fat is essential for hormone production
Drink water to thirst
Only drink water and avoid all other beverages including coffee, tea, and alcohol
Add salt to taste
Use salt as needed but avoid all other seasonings, sauces, and spices which come from plants
Eat until satisfied
Trust your body's natural satiety signals rather than counting calories or restricting portions
Avoid dairy with lactose
If including dairy, choose items without lactose to prevent blood sugar and insulin spikes
Plants contain natural carcinogens that outweigh pesticides by a factor of 10,000 — Brussels sprouts have 136 known human carcinogens, spinach and kale have 60-80 each
Professor Bruce Ames from Berkeley published research in 1989 showing naturally occurring plant poisons outweighed pesticides by weight by 10,000 times and were orders of magnitude more likely to cause cancer than pesticides.
High insulin levels from carbohydrate consumption block the conversion of testosterone to estrogen in women's ovaries, leading to PCOS — the number one cause of infertility
Dr. Chaffee explains that women make testosterone first, then convert it to estrogen, but elevated insulin from carbs disrupts this process, causing hormonal imbalances that prevent conception.
Cholesterol is essential for fertility — every cell membrane is made of cholesterol, and all hormones including testosterone and estrogen are made from cholesterol
Dr. Chaffee reports seeing men in their 50s and 60s increase testosterone by 30-40% in three months with dietary changes focused on increasing fat and cholesterol intake, with one 65-year-old doubling his testosterone to levels of a 26-year-old.
The 1977 USDA declaration that cholesterol causes heart disease was based on fraudulent studies paid for by sugar companies — we have the actual contracts and internal memos
The Journal of the American Medical Association published in 2015 actual internal memos from sugar companies detailing how they paid three Harvard professors $6,500 (equivalent to $50,000 today) to falsify data and blame cholesterol instead of sugar for heart disease.
Phytoestrogens in plants disrupt fertility more than hormones in meat — three ounces of soy contains over one million nanograms of estrogen compared to 3.9 nanograms in hormone-treated meat
Dr. Chaffee breaks down the numbers: a fertile woman makes 150,000-180,000 nanograms of estrogen daily, birth control pills contain 35,000 nanograms, but three ounces of soy contains over one million nanograms.
Autoimmune conditions like Hashimoto's thyroiditis resolve on carnivore diet because plant lectins create leaky gut and molecular mimicry that causes antibodies to attack your own tissues
Dr. Chaffee reports that patients with Crohn's and ulcerative colitis achieve complete resolution of inflammation on biopsy within three months on pure carnivore diet, and he has yet to see someone take longer than three months to resolve these conditions.
Humans are biologically carnivores — we're the only species that eats outside our evolutionary diet and the only species with chronic diseases like obesity, diabetes, and cancer
Dr. Chaffee points out that animals in zoos eating species-appropriate diets remain lean and muscular despite sedentary lifestyles, while golden retrievers' lifespan dropped from 17 years in the 1970s to 9 years today as they switched from table scraps to plant-based kibble.
The carnivore diet is naturally self-regulating — your body tells you when to stop eating through taste and satiety signals, eliminating the need to count calories or macros
Dr. Chaffee explains that patients report meals starting to taste less appealing when they've had enough, creating natural portion control, while he personally eats 3-4 pounds of ribeye daily and maintains optimal body composition at age 42.
Plants contain natural carcinogens that outweigh pesticides by a factor of 10,000 — Brussels sprouts have 136 known human carcinogens, spinach and kale have 60-80 each
▶ 8:14High insulin levels from carbohydrate consumption block the conversion of testosterone to estrogen in women's ovaries, leading to PCOS — the number one cause of infertility
▶ 47:39Cholesterol is essential for fertility — every cell membrane is made of cholesterol, and all hormones including testosterone and estrogen are made from cholesterol
▶ 33:30The 1977 USDA declaration that cholesterol causes heart disease was based on fraudulent studies paid for by sugar companies — we have the actual contracts and internal memos
▶ 23:01Phytoestrogens in plants disrupt fertility more than hormones in meat — three ounces of soy contains over one million nanograms of estrogen compared to 3.9 nanograms in hormone-treated meat
▶ 35:25Autoimmune conditions like Hashimoto's thyroiditis resolve on carnivore diet because plant lectins create leaky gut and molecular mimicry that causes antibodies to attack your own tissues
▶ 44:00Humans are biologically carnivores — we're the only species that eats outside our evolutionary diet and the only species with chronic diseases like obesity, diabetes, and cancer
▶ 15:02The carnivore diet is naturally self-regulating — your body tells you when to stop eating through taste and satiety signals, eliminating the need to count calories or macros
▶ 50:54“Plants are healthy and necessary for optimal nutrition and fertility”
CONSIDER: Plants contain natural toxins and carcinogens that create inflammation and hormonal disruption, while meat provides all essential nutrients in the proportions humans need
“Cholesterol and saturated fat are dangerous and should be avoided”
CONSIDER: Cholesterol is essential for hormone production and cellular health — the 1977 guidelines were based on fraudulent studies paid for by sugar companies
“You need a varied diet with multiple food groups for optimal health”
CONSIDER: Animals in nature eat one food source and thrive — dietary variety is unnecessary and potentially harmful when it includes foods outside your evolutionary diet
“Plants are trying to kill you.”
“We're the only species that eats outside our evolutionary diet and the only species that has all these horrific health issues.”
“If you feed an animal something that doesn't eat in the wild, something it didn't evolve on, it gets sick. What does it get sick with? It gets obesity, heart disease, diabetes, cancer, liver disease, arthritis, autoimmune diseases, all the same things that we get.”
“The naturally occurring poisons and carcinogens in plants outweighed the pesticides we sprayed on them by weight by a factor of ten thousand.”
“PCOS is the number one cause of infertility in women. So just a very simple change in your dietary habits of just not eating carbs, not eating sugar, limiting alcohol to, I don't know, once or twice a year, never if you can, and that will optimize things.”
“If you need a calculator to figure out what to eat, you're eating the wrong thing.”
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Frameworks & Methods
Common Beliefs
Conventional 'normal' lab ranges are based on sick populations and miss optimal health markers needed for fertility
Dr. Watkins explains TSH reference range is 0.45-4.5, but someone at 0.057 is 'one bad stressful situation from bottoming out' despite being technically normal. She's seen patients told their thyroid is normal when only TSH was tested, missing Hashimoto's detected through antibody testing.
Hashimoto's thyroiditis is largely environmental, driven by gluten inflammation, pesticides, and gut permeability
Dr. Watkins notes strong scientific evidence linking gluten to thyroid inflammation, plus environmental toxins from food, water, cleaning products, and occupational exposures. She sees genetic predisposition triggered by environmental burden in her practice.
Ninety percent of medical school curriculum focuses on pharmacology, while 80% of medical schools don't require a single nutrition class for doctors to graduate
Calley Means, former pharma lobbyist, reveals that Stanford Medical School and Harvard Medical School are among the institutions that don't require nutrition education, despite food being the primary driver of metabolic dysfunction affecting fertility.
PCOS and fertility issues are fundamentally connected to insulin resistance and metabolic dysfunction, which can be reversed through dietary interventions
Calley's sister Casey, a Stanford-trained surgeon, discovered that patients with fertility issues, depression, diabetes, and high cholesterol all shared root metabolic dysfunction that could be addressed through food and exercise interventions rather than separate medications for each condition.
