This week: the seed-oil panic, read back to what the human studies actually say.

The pitch: a 30-day tea, a little lymph massage, and the poison leaves. The catch: nobody selling this can name the toxin. The FTC could name the money, though — it charged Teami with taking in more than $15 million on detox-tea weight-loss claims it had no science for, and later mailed $930,000 back to the people who bought them (FTC complaint and settlement). The one real effect of a detox tea is the laxative. You already own two organs that do this for free.

The cheapest tub in the store is the one that works. Hundreds of trials back creatine monohydrate for strength and lean mass when you're also lifting, and it's one of the most-studied, best-tolerated supplements on the shelf (ISSN position stand). The fine print: it works with training, not instead of it, and the fancy "HCl" and "buffered" versions are just the monohydrate with a markup. One thing the label won't tell you: the FDA doesn't check what's actually in a supplement tub before it sells, so purity varies brand to brand — if that matters to you, look for a third-party seal like NSF Certified for Sport or Informed Sport, or a Creapure-certified monohydrate, which means an outside lab confirmed the powder matches the label (how third-party testing works).

Bromelain is a real pineapple enzyme with real, modest anti-inflammatory data — the trials that exist mostly put it up against painkillers for arthritic knee pain, where it holds its own (randomized trial). Nobody studied it as a morning "gut ritual" that debloats you by Friday. Real enzyme, real small effect, aimed at a completely different joint.

Start with the real thing, because there is one. Seed oils are mostly linoleic acid, an omega-6 fat. In a dish, omega-6 fats can feed inflammatory pathways. Americans eat far more of them than their great-grandparents did. That is all true, and it is where the story is supposed to end: more linoleic acid in you, more disease in you.

The step the reel skips is measuring it in actual humans. A consortium pooled 30 prospective studies from 13 countries — 68,659 people, 15,198 cardiovascular events — and measured linoleic acid in their blood and fat tissue rather than trusting anyone's food diary. People with the most linoleic acid in them had lower total cardiovascular disease, lower ischemic stroke, and a 22% lower risk of cardiovascular death (Circulation, 2019). Not neutral. The opposite direction from the mechanism the internet is selling. The American Heart Association reached the same corner from the trial side: swapping saturated fat for polyunsaturated vegetable oil cut cardiovascular disease by roughly 30% (AHA presidential advisory, 2017).

Now the part where I have to be straight with you, because the tallow crowd has one real card and they play it constantly. Buried NIH-recovered data from the Minnesota Coronary Experiment — a double-blind trial of 9,423 people — showed that replacing saturated fat with corn oil lowered cholesterol but did not lower deaths (BMJ, 2016). That paper is a genuine dent in the old diet-heart story, and it deserves to be read. Read it, though, and notice what it does not say: it does not find that seed oils caused disease. "The benefit was oversold in 1973" is a long, long way from "this is why you're sick in 2026."

Here's the sliver that's real. Most of the seed oil in a typical American diet arrives inside fried food, chips, and packaged snacks — and cutting those genuinely helps, which is why people who ditch seed oils often do feel better and reasonably credit the oil. Separately, oil that's been deep-fried and reheated over and over does accumulate oxidation products you don't want to eat daily. Neither of those makes linoleic acid the root cause of anything. Cook with whatever you like; the fryer basket and the snack aisle were never the oil's fault.

Quick, before anyone thinks I'm on Team Canola: I'm not telling you to go pour seed oil on your breakfast. The evidence never says “seed oils are health food.” It says something narrower and more useful — trade saturated fat (butter, tallow) for unsaturated fat and heart-disease risk drops, and of the oils you'd actually cook with, extra-virgin olive oil has the strongest human track record. In the PREDIMED trial, a diet built around extra-virgin olive oil cut major cardiovascular events by about 30% against a low-fat diet (NEJM, 2018). That's the closest thing to a “proven” healthy oil we've got — and notice it has nothing to do with the seed-oil fight. Cook with what you like; if you want the pick with the most evidence behind it, it's the olive oil, not the tallow.

Real nerve. Invented switch. The vagus nerve exists and does calm you down — which is why researchers stimulate it with implanted or transcutaneous devices, and why the pooled human data on those devices is still rated low-quality and heterogeneous (2021 systematic review and meta-analysis). Not one of those studies asked anyone to stick their tongue out for 40 seconds. Cortisol runs on a hormonal axis, not a light switch.

Here's the joke the tallow jars don't get. When researchers actually tested oils on human skin, four weeks of sunflower seed oil improved the skin barrier — and olive oil, rich in the same oleic acid that dominates beef tallow, measurably damaged it (randomized skin-barrier study). That's a fact about a lab test on skin, not a reason to eat or avoid either one — but it does make the $30 jar an odd cure for the ingredient that beat it.

This week's gold medal in mental gymnastics goes to the creator who explained that a lymphatic drainage massage "released three pounds of toxins" — and knew it worked because she weighed three pounds less afterward. Ma'am. You went to the bathroom. Your lymph is a drainage system, not a landfill, and the scale is not a toxicology report. Extra points for the before-and-after photos, taken four hours and one exhale apart.

One line for your back pocket: "it's in the junk food" is not the same as "it's why the junk food hurts you." Half the wellness internet runs on that swap — find an ingredient that rides along with a bad diet, promote it to villain, then sell you the replacement. Before you throw out the bottle, ask whether anyone measured the stuff in actual people.

One claim. One verdict. Two minutes.

This Wednesday: can a pill or an IV drip actually whiten your skin? We put glutathione — the pricey, risky "brightening" shortcut — to the test.

Be honest — have you changed your cooking oil because of something you saw online?