Listen on: Apple Podcasts | Spotify | Amazon Music | Podcast Index | Overcast | YouTube

You’ve seen enough misleading headlines to be skeptical, you’ve heard the promises that didn’t pan out, and you’re aware that the wellness industry is very good at selling things that may not work. And yet — you still feel something shift when you pick up a product labeled “all natural.” You still pause when you read that a remedy has been used for five thousand years by millions of people.

That pull you feel? It’s not ignorance, and it’s not weakness. It’s biology. Understanding what’s happening in your brain — and why — is how you actually protect yourself against it.

I’ll start with a confession. I’m a physician with a PhD, 180 peer-reviewed publications, and 66 podcast episodes devoted to teaching critical thinking about health claims. At a recent vet visit for my three Vizslas, my trusted veterinarian told me the rattlesnake vaccine I’d been giving them for years doesn’t have solid evidence behind it — and some vaccinated dogs actually seem to fare worse after a bite. I heard all of that clearly.

And then I ordered the vaccine anyway…

That moment is exactly what this is about. The gap isn’t between ignorance and knowledge. It’s between knowing and doing. Closing that gap requires understanding two things that happen every time a health claim draws you in.

Two Things Happening at Once

The first is a LOGICAL FALLACY — a flaw in the argument being made. Broken steps in reasoning that create a convincing-sounding case even when the evidence isn’t there. The second is a COGNITIVE BIAS— a flaw in how your brain processes those arguments. Mental shortcuts evolved to help humans make fast decisions. They’re not character flaws. Every person has them, including researchers and physicians. The wellness industry has simply become very good at exploiting both.

You need to understand them together. Knowing only the fallacy lets you spot a flawed argument but doesn’t stop you from feeling drawn to it. Knowing only your biases tells you why you’re vulnerable but not which pitfalls to watch for. The combination is the VACCINATION.

AG1: When Natural Sounds Like Safe

AG1 is one of the most heavily marketed supplements in the wellness space right now. One scoop of green powder, everything your body needs. The ingredient list reads like a walk through a farmer’s market: ashwagandha, licorice root, beet root, ginger, mushrooms, and grape seed.

The logical fallacy at work is the Appeal to Nature — the implicit argument that natural equals safe and effective. But arsenic is natural. Cobra venom is natural. Meanwhile, statins are completely synthetic and have saved hundreds of thousands of lives in randomized controlled trials spanning decades. AG1 also deploys Appeal to Authority (Hugh Jackman and Andrew Huberman swear by it) and Appeal to Popularity (fifty thousand five-star reviews). Huberman has genuine expertise in neuroscience. That doesn’t automatically extend to every ingredient in a green powder, but our brains grant it anyway.

The cognitive machinery underneath is the Halo Effect — when someone impresses us in one area, our brains extend their credibility everywhere else. Fifty thousand positive reviews activates Social Proof, a deeply wired instinct that makes following the crowd feel like the safe choice. These responses happen before your rational brain gets involved.

The antidote: ask whether there are randomized controlled trials. Ask whether the endorser’s expertise actually applies here. Ask whether popularity reflects effectiveness or just good marketing.

Traditional Chinese Medicine: When Old Feels Like Proven

Turmeric is everywhere — capsules, lattes, skincare — all carrying the message that it has been used in Ayurvedic and Chinese medicine for over five thousand years to fight inflammation. The implication: they figured this out a long time ago.

This is the Appeal to Antiquity fallacy. Age does not equal proof. Bloodletting was practiced for over two thousand years by respected physicians and nearly killed George Washington. Mercury was used as medicine for centuries. Time preserves things because of culture, tradition, and habit — not because they work.

Turmeric makes the point well. The proposed anti-inflammatory mechanism involving curcumin is plausible. But clinical trial after clinical trial has failed to show meaningful benefit, largely because curcumin has very poor bioavailability — your body barely absorbs it. The history is long; the evidence is thin.

The accompanying bias is the Narrative Bias. A grandmother’s remedy passed through generations weighs far more heavily in our minds than a table of statistics. Stories feel true in a way that data doesn’t. That’s not a flaw — it’s how human cognition works. It’s also how a lot of ineffective products get sold.

Detox Products: When Fear Does the Convincing

Juice cleanses, activated charcoal, colon resets — the message is always the same. Your body has accumulated something harmful, and this product will remove it. You’ll feel lighter, clearer, and more energized. The toxins will be gone.

One useful question: when did you last see a detox product that named the specific toxin it removes, with a measurement, a mechanism, and a before-and-after test showing levels actually went down? It doesn’t happen — because being specific would allow the claim to be quickly debunked. The vagueness is not accidental.

Your body already has a detoxification system — your liver and kidneys — running continuously. When they actually fail, the result is a medical emergency, not something that responds to juice. The Root Cause Fallacy, which travels alongside detox marketing, promises that one simple imbalance explains all your symptoms. Most chronic conditions are multifactorial. A single correctable root cause is almost never how complex illness works.

The bias doing the heavy lifting is the Disgust Response — one of the oldest human emotions, activated directly by the word “toxins.” You don’t decide to feel contaminated; the feeling arrives before the thought. Simplicity Bias compounds it: a clear, simple explanation feels like relief even when it’s wrong. That feeling of certainty can override careful evaluation of whether the answer is actually correct.

The Vaccination

Two questions. Every time a health claim draws you in.

1. What’s creating the pull — which logical fallacy is at work?
2. Why am I drawn to it — which cognitive bias is firing?

Then, what does the evidence actually say — not the mechanism, not the testimonials, not the tradition, but controlled trials independently replicated?

If what you have is a plausible mechanism, a long tradition, or a compelling story, you have a hypothesis. Worth watching. Not worth acting on yet.

I knew there were no controlled trials supporting the rattlesnake vaccine. My vet told me directly that some practitioners had stopped using it. I had everything I needed to pause.

But, I ordered the vaccine anyway. My pattern-seeking brain had connected the vaccine to my dogs surviving previous bites. My bias toward keeping things as they were said don’t change what’s working. All of that happened automatically, and it felt like reasoning. It was really just a reaction dressed up as a decision.

You can’t stop the halo effect from firing when a celebrity endorses something. You can’t stop the disgust response from activating when someone says toxins. But you can notice it happening. Naming it creates just enough distance between the feeling and the decision for your rational brain to catch up.

That noticing — that deliberate pause — IS the vaccination.