It's not the food. It's the wall.
Microplastics have weakened the protein seals that hold your gut wall together. That's why everything you eat now causes problems that didn't exist five years ago. Tunicae Rebuild seals the leaks and rebuilds the wall — with the same molecule a newborn uses to seal their gut at birth.
Microplastics aren't just in your blood. They're breaking the wall that keeps your gut sealed.
The average person now consumes the equivalent of a credit card's worth of plastic every seven days. Most of it travels through the gut, and what doesn't pass through, lodges.
Lab studies show microplastics decrease tight-junction proteins — the molecular seals that hold your intestinal wall together. When the seals weaken, the wall opens. The medical name is increased intestinal permeability. The plain-English name is leaky gut.
Bloating after meals you used to handle. Brain fog by 2pm. Sudden sensitivities to foods that were fine last year. The damage is upstream of every single one of those — and gets diagnosed as everything except its actual cause.
Binders. Detoxes. Probiotics. None of them seal the wall.
Most microplastic supplements try to remove plastic from your body. That misses the point. The plastic isn't the active damage — the broken wall is. Tunicae Rebuild rebuilds the wall, with the same molecule a newborn uses to seal their gut after birth: bovine colostrum, concentrated to 575mg of IgG immunoglobulins per scoop.
Colostrum is the milk a mammal produces in the first 72 hours after birth. Its only biological job is to seal the newborn's gut wall. Adults can borrow that signal.
The doctor who discovered leaky gut studied the molecule we built around.
Dr. Alessio Fasano (Harvard Medical School / Massachusetts General Hospital) is the physician who first described leaky gut as a clinical condition. His lab co-authored the paper showing colostrum-derived peptides directly modulate the tight-junction proteins microplastics destroy.
"Bovine colostrum-derived peptides modulate intestinal tight-junction permeability." — Fasano lab, 2023 (PMID 37834178)
We didn't pick colostrum because it sounded good. We picked it because his lab proved it works on the exact mechanism we needed. Every other brand in the category cites a survey of 60 of their own customers. We cite a Harvard paper.
Three citations they don't have.
Bovine colostrum normalized zonulin — the protein that controls intestinal permeability — in a human randomized controlled trial.
Microplastics found embedded in atherosclerotic plaque inside human arteries. The first study to confirm the particles cross from gut to bloodstream in living people.
Andrew Huberman dedicated an episode to microplastic exposure pathways and what the current evidence supports for limiting accumulation.
What's in every scoop.
The numbers that matter.
Every batch tested. Every claim cited. Certificates of analysis posted by batch number on the product page.
The kinds of changes real people describe.
Reviews from early Tunicae customers — verified by purchase, lightly edited for clarity.
What it actually looks like.
Customer photos. No studio shoots. No models. Just where the jar shows up.
What people actually ask before starting.
Why colostrum, instead of detoxes or binders?+
Detoxes and binders try to remove microplastics. That's downstream of the actual damage. The damage is the broken wall — the tight-junction seals microplastics dissolved. Colostrum is the only molecule with peer-reviewed evidence for rebuilding those seals (PMID 28397754, PMID 37834178). Removing plastic without rebuilding the wall is like mopping up a flood without fixing the pipe.
How is Tunicae Rebuild different from ARMRA?+
Three differences. Price: $39–$49 per jar vs ARMRA's $84–$120 for comparable supply. Transparency: 575mg of IgG per scoop, on the label, third-party verified — ARMRA doesn't publish a per-scoop IgG number. Citation backing: we cite a Fasano-co-authored Harvard paper (PMID 37834178) and a peer-reviewed human RCT measuring zonulin (PMID 28397754). ARMRA cites an internal 60-person survey. Same colostrum category. Different evidence base.
Is colostrum safe to take daily?+
Yes. Colostrum is a food, not a drug — the same protein concentrate found in the first milk of every mammal. Human safety data covers daily use up to 60g/day in adults. Tunicae Rebuild's daily scoop is 2.3g. The 90-day money-back guarantee covers you if your body disagrees.
How long until I notice a difference?+
Tight-junction repair takes time. Most customers report digestive comfort changes inside the first 30 days, with cognitive and energy changes typically appearing by day 60–90. The 2-pack and 3-pack are priced for the time horizon the underlying biology requires — and after your first order we'll show you a 6-month-supply lock-in for customers who want the deepest commitment. We don't recommend evaluating Rebuild on a single jar — and the empty-bottle guarantee is built around that.
Is this third-party tested?+
Yes. Every batch is third-party tested for heavy metals, pesticides, glyphosate, microbial contamination, and IgG potency at an NSF-certified facility. Certificates of analysis are available on request and posted with each batch number on the product page.
Where does the colostrum come from?+
American grass-fed, pasture-raised dairy herds, surplus colostrum collected only after the calf has fed first. Cold-processed to preserve the IgG fraction (high heat destroys it). Sourced from a single facility we've audited in person.
What if it doesn't work for me?+
Send back the empty jar within 90 days for a full refund — no questions, no return-shipping cost on us. We'd rather lose the sale than have a customer paying for something that didn't deliver. The biology is real; not every body responds the same way to the same dose.
Can I take this if I'm dairy-sensitive?+
Most people with lactose sensitivity tolerate colostrum because it's a protein concentrate, not whole milk — the lactose fraction is minimal (under 5%). People with confirmed dairy allergy (IgE-mediated reaction to bovine milk proteins) should not take Rebuild. If you're uncertain, talk to your physician — and our 90-day guarantee covers you if you find out the hard way.
Start with the wall.
Microplastic exposure is permanent. The damage is reversible. The defense has to be daily. Tunicae Rebuild is step one — at half the price, with the citations the rest of the category doesn't have.
