Chris Williamson · 2026-07-25 · Chris Williamson (host), Stephen Porges
Polyvagal Theory: Why You Feel So Anxious All The Time - Dr Stephen Porges
30 research-tied claims examined: 3 contradicted 2 overstated 3 context 18 supported 4 unverified
2 Overstated
Stephen Porges has authored more than 400 peer-reviewed scientific papers.
"You've authored more than 400 peer-reviewed scientific papers and literally created polyvagal theory." (said at 0:00:00)
The host claims that Stephen Porges has authored "more than 400 peer-reviewed scientific papers" and created the polyvagal theory. Published records confirm that Stephen Porges developed Polyvagal Theory (PVT), as outlined in his published review articles (e.g., PMID 38108034, PMID 41035859). However, PubMed indexes approximately 250 to 300 publications under Porges SW / Porges S (including non-indexed papers or book chapters, totals in biographical notes typically range around 300 publications rather than >400 peer-reviewed papers). Therefore, while his creation of the polyvagal theory and extensive publication record are real, claiming >400 peer-reviewed papers is overstated relative to indexed database records.
Four clinical trials of AG1 NextGen showed it fills common nutrient gaps, improves key nutrient levels in 3 months, and increases healthy gut bacteria tenfold.
"And now they've taken it a step further with AG1 NextGen, backed by four clinical trials. And in those trials, it was shown to fill common nutrient gaps, improve key nutrient levels in just 3 months, and increase healthy gut bacteria by 10 times, even in people who already eat well." (said at 0:38:40)
Published randomized clinical trials on AG1 (Athletic Greens) demonstrate that the supplement can acutely increase circulating micronutrient levels and improve dietary micronutrient adequacy by filling Estimated Average Requirement (EAR) gaps over 2 weeks, as well as selectively enrich specific probiotic taxa contained in the formulation (such as Lactobacillus and Bifidobacterium species). However, the claim overstates the evidence: the published trials were small (16 to 30 participants) and brief (acute 8-hour pharmacokinetics, 14-day, and 4-week interventions, rather than 3 months), and they found no significant changes in overall gut microbiome alpha or beta diversity, rather than a broad tenfold increase in healthy gut bacteria.
- partial: The effects of AG1® supplementation on the gut microbiome of healthy adults: a randomized,… (Journal of the International Society of Sports Nutrition 2024) · cited 5x in the literature
"AG1 Ⓡ supplementation enriched two probiotic taxa ( Lactobacillus acidophilus and Bifidobacterium bifidum ) that likely stem from the probiotics species that exist in the product, as well as L. lactis CH_LC01 and Acetatifactor sp900066565 ASM1486575v1 while reducing Clostridium sp000435835." (abstract, results, passage verified)
pubmedfull study (doi) - partial: Effect of AG1 ® supplementation on nutritional adequacy and gut microbial composition in t… (Frontiers in nutrition 2026)
"AG1 ® did not produce large, global shifts in microbial alpha or beta diversity, supplementation was associated with selective enrichment of key bacterial taxa commonly linked to gut health, including Lactiplantibacillus plantarum, Lacticaseibacillus rhamnosus , and Bifidobacterium animalis . AG1 ® supplementation significantly improved nutritional adequacy by increasing the total number of micronutrient Estimated Average Requirements (EARs) met compared to placebo (2.8; p = 0.0011)" (abstract, results, passage verified)
pubmedfull study (doi) - partial: Absorption kinetics of vitamins and minerals from a novel nutritional product in physicall… (Frontiers in nutrition 2026)
"Acute consumption of AG1 resulted in measurable increases in circulating levels of most of the tested micronutrients, indicating effective absorption. These findings suggest that AG1 may influence nutrient status in healthy adults." (abstract, conclusions, passage verified)
pubmedfull study (doi)
Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.