Rising exposure
+50%
Microplastic concentration in brain tissue rose roughly 50 percent between 2016 and 2024. The load is climbing, not holding.
Nihart et al., Nature Medicine, 2025
Curetonix · Glutathione
Illustrative · microplastic fragments, average brain equivalent
Let's stop more from getting there.
Researchers analyzed 52 postmortem brains. The average one held roughly a plastic spoon's worth of microplastic. Your body's primary defense against the oxidative stress they drive is glutathione, and it's been falling since your twenties. Curetonix rebuilds it.
Sublingual dropper
Reduced (active) glutathione
The master antioxidant
The Finding · 01 · Nihart et al. · Nature Medicine · 2025
Brain tissue held 7 to 30× more microplastic than liver or kidney.
7–30× more
University of New Mexico researchers analyzed 52 postmortem brain samples. Brain tissue carried far more microplastic than liver or kidney, roughly a plastic spoon's worth in the average brain. Concentrations rose about 50 percent between 2016 and 2024. Samples from people with a dementia diagnosis held several times more again.
Nihart et al., Nature Medicine 31, 1114–1119 (2025). Findings describe environmental contaminants in tissue and are not a study of any product.
The plastic is already in. The open question is what defends your cells against the oxidative stress it's linked to. That job belongs to glutathione, and yours is running low.
The Link · 02
How plastic in tissue becomes a problem your cells have to fight.
Microplastics don't sit inert. In lab and animal work they're associated with oxidative stress, the same free-radical damage your body neutralizes every day. Glutathione is the master antioxidant that does that neutralizing. More load plus a falling reserve is the squeeze.
Microplastic in tissue
Now confirmed in the human brain
→
Oxidative stress
Free-radical load your cells must clear
→
Glutathione defends
The reserve that neutralizes it, depleted with age
The Scope · 03
The exposure is everywhere. So is the demand on your defense.
Your defense
~50% lower
Glutathione, the master antioxidant, falls by roughly half between your twenties and sixties, and faster under alcohol, poor sleep, and stress.
Redox & aging literature
Oral absorption
low
Swallowed glutathione is largely broken down in the gut before it's absorbed, which is why route matters.
Bioavailability studies
The Product · 04
30ml dropper · 30 servings
The Answer · Reduced Glutathione
Rebuild the defense. Under the tongue, past the gut.
You can't un-eat the plastic. What you can do is resource the system that handles the oxidative stress it's linked to, instead of leaving it to run down with age.
This is reduced (active) glutathione in a sublingual dropper. Held under the tongue, it absorbs through the tissue directly, skipping the stomach breakdown that wastes swallowed doses. One measured dose, once a day.
Format
Sublingual dropper
Frequency
Once daily
Active
Reduced glutathione
Route
Under the tongue
Buy 2 Get 1 Free
Exposure is daily. So is the defense.
Glutathione is a reserve you rebuild over weeks, not a level you spike once. The three-bottle set is a full quarter of daily dosing, which is where the return shows.
Glutathione · 30ml Sublingual Dropper
- Reduced (active) glutathione, sublingual route
- One dropper daily, 30 servings per bottle
- 90-day keep-it guarantee
90-day guarantee. Take it daily for three months. If nothing's changed the way you hoped, email us, keep the bottles, and we refund you.
The Mechanism · 05
What glutathione actually does.
To be plain about it: glutathione does not remove plastic particles from your brain. Nothing in a bottle does. What it does is neutralize the free radicals that oxidative stress generates, recycle spent vitamins C and E back into the fight, and serve as the substrate your liver uses to package and clear toxins. Raise the reserve and every one of those jobs gets resourced.
Reserve depleted
Rising load, falling defense. The squeeze widens.
Reserve rebuilt
The master antioxidant is resourced to do its job.
01
Neutralizes free radicals
The direct antioxidant job, against the oxidative stress plastics are linked to.
02
Recycles vitamins C and E
Regenerates spent antioxidants back to their active forms, which is why it's called the master.
03
Fuels Phase II detox
Serves as the substrate the liver uses to conjugate and clear toxins.
Glutathione's roles in redox defense and hepatic conjugation, its decline with age, and the poor oral bioavailability that makes route matter are documented in the biochemistry literature. The microplastic findings and the oxidative-stress association are separate bodies of research about the environment and the molecule, not clinical studies of this product. This product is not claimed to remove microplastics.
Why the set · 06
Three bottles. Because the load doesn't take days off.
A single bottle tells you whether you tolerate it. A quarter of daily dosing is where a depleted reserve actually refills. The set is priced so the full run costs less than buying three separately.
01
A full quarter, not a trial
Ninety days of daily dosing. You're rebuilding a reserve that fell over years, and this is enough runway to judge it honestly.
90 servings, one daily.
02
The third bottle is free
Buy two, the third is on us. It works out to about a third off per bottle versus buying them one at a time.
$119.98 for three.
03
Active form, real route
Reduced (active) glutathione, taken sublingually so it isn't destroyed on the way in. No proprietary blend, no filler antioxidants padding the label.
One active. Legible dose.
04
90 days to decide
Finish the set on us if it doesn't earn its place. Take it daily for three months and keep the bottles either way.
Keep-it guarantee.
90-day keep-it guarantee.
How to take it · 07
Once a day, under the tongue.
One full dropper
Squeeze it under the tongue and hold for about 60 seconds before swallowing, so it absorbs through the tissue.
Away from food
An empty mouth absorbs cleaner. First thing in the morning or between meals works well.
Give it weeks, not days
You're refilling a reserve, not spiking it. Consistency over the set is what moves the baseline.
Stack it if you want
Glutathione pairs cleanly with vitamin C, which helps keep it in its active reduced form.
The Formula · 08
One active. A clear reason for it.
This is a single-active glutathione dropper. We didn't blend in NAC, milk thistle, or a stack of secondary antioxidants to bulk the label. One molecule, the master, delivered by a route that keeps it intact.
Reduced Glutathione
Primary active · sublingual
Glutathione is a tripeptide of glutamate, cysteine, and glycine, made inside every cell and central to the body's antioxidant and detox systems. It neutralizes free radicals, recycles vitamins C and E back to their active forms, and serves as the substrate for Phase II liver conjugation. We use the reduced (active, GSH) form the body actually uses, delivered sublingually so it absorbs through the oral tissue rather than being broken down in the stomach.
Research context: Glutathione's roles in redox defense and hepatic detoxification, its age-related decline, and its poor oral bioavailability are well characterized in the biochemistry literature. The microplastic brain findings (Nihart et al., Nature Medicine, 2025) and the general association between microplastics and oxidative stress are separate research about the environment and the molecule. Neither describes this product, and it is not claimed to remove microplastics.
Final serving amounts confirmed at manufacturing. We'll always show you exactly what's inside.
The Evidence · 09
Grounded in your own biochemistry.
GSH
The active form
Reduced glutathione is the state your cells actually use, not the oxidized form they'd have to convert first.
↺
Recycles C and E
Glutathione regenerates spent vitamins C and E, which is why it's called the master antioxidant.
≈
Sublingual route
Held under the tongue, it absorbs through oral tissue and skips the gut breakdown that wastes swallowed doses.
∞
Daily defense
Exposure and free-radical load are daily, and the reserve falls with age. Rebuilding it is a daily process.
Questions · 10
Answered plainly.
Does this remove microplastics from my brain?+
No, and we won't pretend otherwise. No supplement pulls plastic particles out of tissue. What glutathione does is act as your body's primary antioxidant against the oxidative stress those particles are associated with, and that reserve falls with age. This rebuilds the defense, it doesn't extract the plastic.
Why sublingual instead of a capsule?+
Swallowed glutathione is largely broken down in the gut before it's absorbed, the long-standing knock on oral capsules. Holding it under the tongue lets it absorb through the oral tissue directly, so more of the dose survives the trip in.
What's the link between plastic and glutathione, exactly?+
Microplastics are associated with oxidative stress in lab and animal research, which is free-radical damage your cells have to neutralize. Glutathione is the master antioxidant that does that work. The connection is that a rising load meets a defense that's declining with age. It is an association in the research, not a claim that this product acts on plastic.
Reduced vs oxidized, what's the difference?+
Reduced glutathione (GSH) is the active state your cells use. Oxidized (GSSG) is the spent form that has to be regenerated first. This uses the reduced form, so you're delivering the version the body puts to work directly.
How fast will I notice something?+
You're refilling a reserve that fell over years, not spiking a level for an afternoon. Judge it over the full set, taken daily for a quarter, not the first few days.
How does the Buy 2 Get 1 work?+
Add three bottles and the third comes free at checkout, $119.98 for three, about $39.99 a bottle. That's a full 90-day supply at a third off per bottle, with the same 90-day keep-it guarantee.
Buy 2 Get 1 · 90-day guarantee
The plastic is in. Rebuild your defense.
Glutathione is your master antioxidant against the stress those particles drive, and it's been falling since your twenties. One dropper a day, past the gut, with 90 days to decide it's worth keeping.
Get Buy 2 Get 1 — $119.9890-day keep-it guarantee · Reduced glutathione