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Truth Seekers: Where Data Meets Reality
Tired of sensational headlines and conflicting health advice? Join Alex Barrett and Bill Morrison as they cut through the noise to uncover what scientific research actually says about the claims flooding your social media feed.
Each week, Alex and Bill tackle a different health, nutrition, or wellness claim that everyone's talking about. From "blue light ruins your sleep" to "seed oils are toxic," they dig into the actual studies, examine the methodologies, and translate the data into plain English.
No agenda. No sponsors to please. No credentials to fake. Just two people committed to finding out what's really true by going straight to the source—the research itself.
Perfect for anyone who's skeptical of influencer health advice but doesn't have time to read every scientific study themselves. New episodes drop regularly, delivering clarity in a world full of clickbait.
Question everything. Verify with data. Find the truth.
Disclaimer: Truth Seekers provides educational content based on published research. Nothing in this podcast should be considered medical, financial, or professional advice. Always consult qualified professionals for decisions affecting your health and wellbeing.
**Sealed Shut: The Truth About Mouth Taping**
Alex: Right, so I've been sent the same TikTok video about four times this week. Different people, same claim: stick a piece of tape over your mouth while you sleep, and apparently you'll wake up rested, cured of snoring, and—my personal favourite—somehow acquire a more chiseled jawline.
Bill: Yeah, I've seen it too. And the comments are wild. Thousands of people saying it changed their lives, they sleep better, they're breathing better. One person said it cured their sleep apnea. And then there's a link to buy the tape.
Alex: Because of course there is. Now, I want to be fair here—sleep problems are genuinely awful. If you've ever shared a bed with someone who snores, or you've woken up exhausted every single day despite technically sleeping eight hours, you will try almost anything. I completely understand why this is appealing.
Bill: Totally. And here's the thing—there actually are studies on mouth taping. It's not like someone made this up wholesale. Real research exists, and that's probably why it spreads so convincingly.
Alex: Which is exactly the thing that made me want to look closer. Because in my experience—and I spent enough years in journalism watching PRs send over "groundbreaking studies" to know—when something sounds like it has science behind it, that's precisely when you need to check whether the science actually says what everyone's claiming it says.
Bill: And in this case, the answer is a pretty emphatic no. So, a peer-reviewed systematic review was published in PLOS ONE—this is May 2025—led by Dr. Brian Rotenberg at the University of Western Ontario. They did a comprehensive sweep of the literature. Every study on mouth taping for sleep issues published between 1999 and 2024.
Alex: Okay. And how much evidence did they actually find? Are we talking hundreds of studies?
Bill: Ten.
Alex: Sorry—ten?
Bill: Ten studies that met the inclusion criteria. Total participants across all ten: 213 people.
Alex: Two hundred and thirteen people. That's... quite the basis for a viral wellness movement.
Bill: And it gets better. The researchers ran all ten studies through the Newcastle-Ottawa Scale—it's basically the standard tool for assessing how well-designed an observational study is. You score studies on things like how participants were selected, whether outcomes were measured properly, whether there's a comparable control group. It's actually a pretty elegant system—
Alex: Bill.
Bill: Right, yes. The verdict on all ten studies? Poor quality. Every single one.
Alex: Across the board.
Bill: Across the board. Mostly before-and-after designs with no control groups, no blinding, no long-term follow-up. The longest ran for a few weeks. Nobody tracked what happened after that.
Alex: Okay. So—set aside the quality for a second—what did those ten studies actually find? Because clearly something is getting reported as positive.
Bill: So the main thing being measured is AHI—Apnea-Hypopnea Index. How many times per hour you stop breathing or have reduced breathing during sleep. Six of the ten studies looked at this. Only two of them found any statistically significant improvement.
Alex: Two out of six.
Bill: Two out of six. And even in those two—look at the numbers. The best result was a study of twenty people with mild sleep apnea. AHI went from 8.3 events per hour down to 4.7.
Alex: Okay but hold on—that is a reduction. That's real. I'm going to push back on just dismissing that.
Bill: I mean, sure—
Alex: No, seriously. If I'm one of those twenty people and my number went down, that matters to me. Statistically significant means something, doesn't it?
Bill: Statistically significant means the result probably isn't random noise. It doesn't mean the result changes anything for the person experiencing it. And the researchers said exactly that—they wrote, explicitly, that it's "unclear whether these reported significant reductions in AHI are meaningful clinically."
Alex: Right, but—
Bill: So, an AHI of 5 to 15 is classified as mild sleep apnea. These patients started at 8.3—mild—and ended at 4.7—borderline normal. You moved from one end of mild to the other end of mild. Nobody measured whether patients felt better, functioned better during the day, had improved heart health. Just the number shifted.
Alex: Okay. I take your point. I think I was conflating statistical and clinical significance, which is—yeah, those aren't the same thing.
Bill: It's a genuinely confusing distinction. When I was doing A/B testing, we'd see statistically significant results all the time that we'd never actually ship because the real-world impact was negligible. Same problem here.
Alex: So even the studies that technically showed a positive result, the researchers themselves were saying—hold on, we're not sure this actually matters for the person living it.
Bill: Right. And meanwhile three of the six AHI studies showed no significant change at all. One only showed improvement when mouth taping was combined with a dental device—not from the tape alone.
Alex: Mmm.
Bill: And here's the part that genuinely floored me. Both of those positive studies—the ones showing any benefit—explicitly excluded patients with nasal obstruction. Allergic rhinitis, chronic rhinitis, deviated septum, sinus issues. All excluded.
Alex: Hang on. Nasal obstruction is one of the most common reasons people breathe through their mouths in the first place.
Bill: Exactly.
Alex: So the people most likely to be mouth breathing are the exact people these studies didn't include.
Bill: And then the results get reported as universal evidence that mouth taping works for mouth breathers. It's like testing a rain jacket only on sunny days and concluding it's waterproof.
Alex: That is a staggering design flaw. I mean—honestly, that's the kind of thing that when you see it you think: how did this pass review? How did nobody—
Bill: Well, it did get flagged. In the systematic review itself. Just not anywhere in the TikToks.
Alex: Not even close. And there's more, right? Because the risks aren't just about a study flaw—
Bill: Yeah. There's a study—54 patients, using a technique called drug-induced sleep endoscopy, where researchers can actually watch the airway during sleep—
Alex: Oh, that's interesting actually. How does that work?
Bill: They use sedation to put patients into sleep-like states while monitoring the airway directly. So instead of inferring what's happening from sensor data, you can observe the airway collapsing or staying open in real time. It's actually a really solid methodology for this kind of question—
Alex: Okay, but—what did they find?
Bill: Right, yes. They found that in patients with certain types of airway obstruction, closing the mouth actually decreased airflow. Not maintained it. Decreased it. The body had been compensating through mouth breathing for a reason. Take away the mouth route, and things got worse.
Alex: So the mouth breathing wasn't a bad habit. It was a backup system.
Bill: Exactly. And then there's the mouth puffing phenomenon. A study with 71 participants found that in patients with severe sleep apnea who had their mouths taped, their bodies fought back. Kept trying to breathe through the mouth against the tape. Oxygen levels actually got worse in those patients.
Alex: Their bodies were screaming for air and they had tape over their faces.
Bill: And four of the ten studies in this systematic review explicitly flagged the risk of asphyxiation if someone has nasal obstruction while their mouth is taped shut. Dr. Rotenberg put it plainly: "Taping the mouth shut during sleep is dangerous, especially among those who may not be aware they have sleep apnea." That's not a fringe concern—that's the lead author.
Alex: And this is the thing that I find genuinely maddening. Those warnings are on page eleven of a peer-reviewed paper. They are not in the influencer's video. They are not in the caption. I covered health stories for years, and this was always the pattern—the nuance lives in the methods section, and the headline is whatever the PR wanted it to be.
Bill: And here's who we're actually talking about. An estimated 25 million Americans have undiagnosed sleep apnea. People who feel exhausted, suspect something's wrong, maybe they snore—and they find a TikTok that says: cheap fix, try it tonight. Instead of seeing a doctor, they stick tape over their mouth. And if they have moderate or severe sleep apnea—which they don't know—they could be making their cardiac risk worse.
Alex: Right. And I want to spend about thirty seconds on the cosmetic claims, because they deserve to be said plainly. The jawline thing. The anti-aging. There are zero scientific studies measuring any cosmetic effect of mouth taping. Not inconclusive—zero. WebMD went looking and found nothing. Structural changes to the jaw in adults don't happen from tape. That's just not how bone works.
Bill: That part is pure marketing dressed as wellness science.
Alex: So where does this actually leave us? Because—and I want to be honest about this—I don't think the answer is "mouth taping is useless for every single person who has ever existed."
Bill: No, fair. Actually, that's the thing I want to be careful about too. The evidence does suggest a very narrow, very specific situation where it might help: mild sleep apnea, confirmed by a doctor, with documented clear nasal passages, where the mouth breathing is genuinely habitual rather than compensatory. In that situation? Modest snoring reduction, modest AHI improvement. Emphasis on modest.
Alex: And modest, doctor-confirmed, narrow subpopulation is a very different sentence from "try this tonight to fix your breathing and get a better jawline."
Bill: Very different sentence.
Alex: So here's what I actually want people to take away from this. If you snore, if you wake up exhausted, if you suspect sleep apnea—these are symptoms worth taking seriously. Sleep apnea is connected to heart disease, stroke, serious stuff. There are proven treatments: CPAP machines, oral devices, positional therapy. Decades of evidence behind them. Go and get a proper diagnosis.
Bill: And the pattern to watch for every time a trend like this surfaces: who was actually studied, and who was left out. The mouth taping research excluded the exact patients the trend is marketed to. That gap between the study population and the real-world population—that's where the misinformation lives.
Alex: If you're currently using mouth tape because something online told you to, have a conversation with your doctor before you continue. Not because we're being alarmist—but because you deserve to know whether it's actually appropriate for your specific airway, your specific anatomy, your specific situation.
Bill: The science isn't saying this is never worth discussing. It's saying you should have that discussion with a sleep specialist, not with someone selling tape on TikTok.