From the desk of Dr. Kevin, MD
"I wanna meet the marketer who came up with the term ‘leaky gut’ for the first time. That’s f*ing genius."
Hello Scalpelheads,
It’s the Saturday Scalpel, and this is your boy Kev…
Today, I’m gonna talk about something hot.
Something leaky…
Everyone tells a different story… some say it’s the root of all diseases! Some would deny its existence!
Crazy world out there - you don’t know what to believe…
But as always, I got you…
I spent 26 extra hours this week specifically on this topic to bring you something you can save, come back to, and read over and over again…
So you can praise my genius in simplifying this disgusting, scammy-looking, super-trendy topic…
Yes, the f***ing “Leaky Gut” situation.
Today you’re gonna find out:
What the actual f*** it is, how to identify it, if it’s new, whether you need to do anything about it, and whether lectin is the protein ruining your gut…(spoiler: probably not your arch-nemesis).
Creator: Luiz Fernando Brito
What “leaky gut” actually is (a short rant 😑)
Marketing term: leaky gut.
Clinical idea: intestinal barrier hyperpermeability.
Your gut lining is a one-cell-thick wall with protein gates called tight junctions. (See the picture above)
Now… when those gates get sloppy, more stuff slips through to the immune system than intended → inflammation, symptoms.
Think airport security:
Tight junctions = scanners.
Alcohol/NSAIDs/stress/infections = broken scanners.
Extra particles (bacterial bits like LPS, food antigens) = unscreened passengers.
Immune system = TSA alarm.
If the alarms scream all day, you feel it.
What’s Real vs. BS?
Green (well-supported):
• Barrier changes show up in IBD (Crohn’s/UC) and some arthritides.
• NSAIDs, alcohol, GI infections, and severe stress can increase permeability.
• Small intestine naturally leaks more than colon… it’s the usual silent trouble spot.
Yellow (promising/mixed):
• IBS links (symptoms improve when you fix triggers), metabolic and skin connections are plausible but not universal.
• Probiotics, glutamine, zinc-carnosine: helpful for some, not magic for all.
Red (skip):
• Fancy at-home “leaky gut panels,” stool zonulin scores, miracle 3-day fixes, or cutting 40 foods forever with no re-challenge.
Anyway… bile acids: the under-discussed plot twist
Too many bile acids in the colon act like detergent…
They strip mucus, irritate the lining, and cause diarrhea.
Your body usually reabsorbs ~95% in the ileum (last part of your small intestine); microbes detox the rest.
Translation: don’t randomly supplement bile acids unless a clinician told you to.
Diarrhea + urgency after meals? Put this on the differential.
Do you “have” leaky gut?
You don’t need a novelty lab to suspect barrier issues.
Remember: I said suspect, not diagnose!!!
Use clinical outcomes:
Bloating, abdominal pain, irregular stool, brain fog, fatigue, skin flares, joint grumbles…especially after alcohol/NSAIDs/UPFs or a stomach bug.
But if you’ve got red flags (blood in stool, weight loss, anemia, fever, night symptoms, family history of IBD/colon cancer), stop reading and talk to a clinician. 😑
Real actionable tips: The 2–4 week “Foundations First” reset
Remove (first):
• NSAIDs, alcohol (true off-days), ultra-processed foods with emulsifiers (read labels), late-night chaos.
• Fructans as a targeted first cut (onion, garlic, wheat) if you’re IBS-ish.
• Gluten: trial only if symptoms suggest it or you’re HLA-DQ2/8; treat celiac as a separate medical rulebook.
Add (sane trials):
• Fiber diversity to 25–35 g/day (ramp slowly).
• Fermented foods 1–2 servings/day if tolerated.
• Movement (walks daily, 2–3 short lift sessions/week).
• Sleep window you actually keep.
• Breath break after meals (yes, five minutes matters).
Targeted levers
Probiotic (reputable, Bifido-forward blend or a simple single-strain). Don’t overthink strains; watch your symptoms.
Prebiotics: Start with GOS if gas is a bully; go slow. Inulin/FOS can help some, torture others.
Glutamine: trial dose under guidance; data for IBS-D/permeability signals exist.
Short-term low FODMAP, but re-introduce systematically or you’ll shrink your microbiome and your social life.
🍅 Tomatoes, lectins, and nightshade drama
Lectins are proteins plants use for defense. Internet lore turned them into digestive supervillains. Reality check:
Tomatoes do contain lectins, mostly in skins and seeds, but cooking (sauce, roasting, pressure cooking) denatures many lectins.
Most people tolerate tomatoes just fine; benefits (fiber, lycopene, polyphenols) outweigh theoretical lectin risks.
If tomatoes seem to trigger reflux, bloat, or skin flares, test this sanely:
Try peeled/seeded or well-cooked tomato (passata, long-simmered sauce).
Keep the portion modest and don’t pair with alcohol/garlic/onion on test days (confounders!).
Track symptoms for 48 hours, then re-challenge in a week.
Still reactive? Cool… limit or avoid personally. But a blanket “no tomatoes” for humanity because of lectins? That’s not science; that’s marketing.
P.S. Some tomato reactions are acid/histamine issues, not lectins. Different problem, different solutions.
Testing: when, what, and what to ignore
(Talking to your doctors here)
Don’t spend big on stool zonulin. It’s unreliable.
Blood “zonulin-family” assays exist but have validation issues.
I-FABP flags mucosal damage, not garden-variety leakiness.
If a test would actually change management, prefer lactulose:rhamnose over the old lactulose:mannitol (mannitol sneaks into diets/cosmetics).
Research setups using ¹³C-mannitol + advanced analytics are promising but not mainstream yet.
Now…wanna rant about your symptoms?
Wanna tell me celery juice did cure your bloating?
Or maybe you’ve got a weird poop story I’ll regret asking for?
Hit reply. I read all of them.
(And judge silently… with love.)
Until next Saturday,
Your leaky-gut whisperer,
Dr. Kevin Cutthebull, MD
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P.P.S Tell us what you liked. Or what you didn’t. I’m not made of glass. Probably.
