Are there vitamins in food (or us)? with Dr. Jordan Grant - 9/9/26
In this September 9th webinar, Tom welcomes Dr. Jordan Grant for a focused conversation on vitamin D, vitamins, hormones, omega-3s, genes, and other claimed substances in biology.
Tom opens by clarifying the purpose of the discussion: this is not about whether cod liver oil, butter, or Weston A. Price-style foods are beneficial, and it is not about attacking anyone’s intentions. The specific question is whether the studies presented as proof actually demonstrate the existence of substances like vitamin D in foods or living beings.
He explains that many people have sent him a Weston Price Journal article claiming to show the type and amount of vitamin D in various foods, and he invites Jordan to walk through the evidence and the thinking process behind these claims.
Highlights from this session include:
-Tom and Jordan discuss the difference between what researchers actually do in a lab versus the stories later told about what those results mean.
-Jordan introduces the distinction between scientific realism and an operationalist/instrumentalist way of thinking, emphasizing the importance of sticking to what can actually be observed.
-They look at the “recipe” often used in claims about vitamins, hormones, nucleotides, amino acids, and other invisible entities: starting with tissue or food, applying chemical steps, creating a product, and then claiming the product was “isolated” from the original material.
-Tom and Jordan examine papers describing vitamin D preparation and isolation, including the use of solvents, acids, chloroform, methanol, irradiation, and crystallization.
-Jordan explains why he sees many of these claims as question-begging: researchers often assume the very entity they are supposed to prove.
-They discuss fluorescence, spectroscopy, chromatography, and similar methods, questioning whether these tests actually prove the presence of a specific substance or simply record a lab behavior.
-Jordan emphasizes that a peak, color change, crystal, or lab readout may be real as an observed effect, but that does not automatically prove the identity, origin, or biological role being claimed.
-Tom and Jordan connect this same thinking to blood tests, hormone tests, vitamin D tests, B12 tests, cholesterol, genes, viruses, and PCR testing.
-They discuss how this way of thinking can make people feel powerless by shifting attention away from lived experience and toward abstract, invisible mechanisms.
-Tom closes by asking where people can hear more from Jordan, followed by a lighter final question about whether Jordan can do a pull-up.
Throughout the webinar, Tom and Jordan emphasize returning to direct observation, questioning assumptions, and separating real-world effects from the stories built around them.
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Lizzie on
To put it simply, Tom makes things clear. I was useless at “science” at school in the 70s but I love listening to Tom’s explanations of things because I can understand them. And I almost laughed out loud when he asked “What do you mean by empirical?” I had just looked it up in the dictionary….
Vee Cord on
Great presentation y’all!! 👍👍 I’ve corroborated much of what was discussed way back when and you’re both on the money! If whatever you’re looking for in a “sample” hasn’t been isolated and purified, it’s impossible to base “anything” else upon something that hasn’t been proven to exist, i.e., ANY type of test, synthetic commercially manufactured product, bioidenticals included etc… But here’s the rub…after going to your site Jordan, you run a business called “Grant Hormone and Wellness” focusing on men’s and women’s health, wellness, and hormone optimization. Hmm..that said. .have you isolated and purified any “hormone” you’re looking to replace and/or optimize, e.g., testosterone, and with what? Inquiring minds would like to know…thanks🙋♂️
Rebecca Clark on
Thank you Tom and Jordan for another awesome conversation.
Jordan – you said you thought it was jarble, I disagree, what you said was so clearly stated. It’s not new to me but I’m sure many more listeners and viewers who haven’t learnt about all this nonsense fake science will enjoy this chat. Every day I find out more fundamentals have not been proven, many that I learnt during my nurse and midwife training ! I look forward to real science in the future .
3 years ago, I was summoned to my midwifery managers office for discussing ‘unfounded research’ . This was recorded on my file for a year. My crime was taking about Gerald Pollock’s research. Also studies that Tom had presented on this very podcast !
Wasn.t funny at time but I’m laughing now.
Love from England.
Feli on
Awesome conversation, loved it! Thank you so much, guys, you simply rock!
Ian on
Does the Sun, the all life giving sun, give us “vitamins” or does it just keep us warm – warm being, perhaps, advantageous to health?