The Microplastic Binding + Gut Health Probiotic.
Winnow is the only daily probiotic packed with strains shown to bind micro- and nanoplastics in preclinical studies.
Love it in 30 days or it's free, seriously.
HOW WINNOW WORKS.
Bind
Winnow's probiotics show strong binding in preclinical testing to 5 common micro- and nanoplastic contaminant types.
1
Pass
As Winnow's probiotics pass through your digestive system, the microplastics and nanoplastics they bind join them.
2
Restore
Our gut health probiotic strains help keep your gut and microbiome flourishing for a happier, healthier you.
3
LEARN MORE
Up to 38% off + Free Shipping
Multi-month packs and subscriptions cost us less, too. So we pass on savings to you.
FDA Safe, GRAS Ingredients
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All Natural Ingredients
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40B CFU Per Dose
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Light Labs Tested
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Crafted Without Plastic
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Free Shipping
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Love It Or It's Free
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Modify Plan Anytime
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FDA Safe, GRAS Ingredients
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All Natural Ingredients
|
40B CFU Per Dose
|
Light Labs Tested
|
Crafted Without Plastic
|
Free Shipping
|
Love It Or It's Free
|
Modify Plan Anytime
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Winnow Daily Probiotic
Our flagship daily probiotic, formulated to support gut health and safely bind microplastics. Each 30 day supply contains 60 capsules (take 2 daily).
Your first order arrives as a Starter Kit including a reusable glass jar. All subscription refills ship pouch only, designed for low waste, and low impact replenishment.
Free US Shipping on subscriptions and orders over $80.
Love your first month or it's on us, seriously. Just let us know in the first 30 days.
Reschedule or cancel anytime.
WHY WINNOW
Winnow starts with something familiar: a great daily probiotic. Then it asks a modern question: what does gut health look like in a world full of plastic?
Winnow supports digestion, balance, and regularity using well-studied probiotic species. On top of that, it includes select strains shown in laboratory and animal studies to physically bind micro- and nanoplastics as they pass through the gut. The aim is simple: support the gut’s natural barrier while delivering the benefits you already expect from a probiotic.
It’s not a detox. It doesn’t claim to remove plastics from the body once they've already moved away from the gut.
It’s a thoughtful upgrade to a daily habit built for modern exposure.
All of this is delivered in a formulation that’s third-party tested for safety and purity, so you get a probiotic you can trust today, with science that’s pointing toward what’s next.
INGREDIENTS & USE
Each serving (2 capsules) contains 40 billion CFUs (colony-forming units) of natural probiotic bacteria and prebiotic fiber, in an acid-resistant capsule for effective delivery to the gut. All ingredients are recognized as safe by the FDA.
Winnow is made in the USA in a CGMP facility with GMO-free ingredients. It is free of major allergens (see testing panel below), and vegan.
Supplement Facts
Proprietary Microplastic Binding Probiotic Blend coupled with Microbiome-Supporting probiotics including: Bifidobacterium longum, Lactobacillus acidophilus, Lactobacillus paracasei, Lactobacillus plantarum, Lactobacillus rhamnosus, and Lactococcus lactis
Other Ingredients: prebiotic fiber, acid-resistant vegan capsules [Hypromellose]
Usage: Take two capsules daily. You may take both capsules at once or split them throughout the day. Winnow can be taken with a meal or about 30 minutes before eating. Some people find taking it with food more comfortable, while others prefer taking it before a meal. Choose the approach that fits best into your routine and helps you stay consistent.
Storage: Keep in a cool dry place. For best results, refrigerate.
TESTING
Today’s food system is more complex than ever. Even foods labeled “healthy” can carry invisible traces of pesticides, heavy metals, or microplastics. Labels don’t always tell the full story. That’s why we go further. Every batch of Winnow is tested with Light Labs to ensure purity, potency, and safety throughout production.
Light Labs is an ISO-17025 accredited facility built on a simple belief: transparency is the key to a healthier food system. They’re reshaping how testing is done — measuring contaminants down to parts per billion and turning data into clear, actionable results.
What we test for
Allergens: Free from gluten, dairy, soy, peanuts, tree nuts, sesame, lupin, fish, egg, shellfish, and crustaceans. Nothing detectable, nothing hidden.
Pesticides: Hundreds of residues screened. Results: all below 25 ppb — thousands of times lower than U.S. safety limits. Glyphosate and AMPA undetectable.
Microbes — wanted and unwanted: Beneficial probiotics verified for viability by CFU counting and rRNA sequencing. Light Labs confirms every batch is free from harmful microbes including coliforms, Staphylococcus aureus, E. coli, Listeria, Pseudomonas, Salmonella, Bacillus cereus, and mold.
Heavy metals: Arsenic, cadmium, lead, and mercury all below 10 ppb — far under global safety thresholds. For context: a single banana naturally contains more heavy metals than a year’s supply of Winnow.
Compliance: Fully Prop 65 compliant.
Our promise: Every result is measured in parts per billion — a single drop in an Olympic-sized pool. “Not detected” means nothing measurable. Any trace levels are far below limits set by the FDA, WHO, and EFSA. You can trust that Winnow is clean, safe, and backed by validated science.
GOOD IN.
BAD OUT.
Microplastics are in our food, water, and even the air we breathe.
And, they're associated with alarming issues once absorbed in our bodies.
Fortunately, help is now as simple as an all-natural daily probiotic. A daily ritual as routine as brushing your teeth.
Winnow: Good
Binds microplastics
Supports gut health
Better, more regular BMs
Decreased inflammation
Mental + hormonal health
SEE THE SCIENCE
Microplastics: Bad
Gut barrier damage
Microbiome dysbiosis
Inflammation
Hormonal disruption
Reproductive concerns
WHY IT MATTERS
A BETTER DAILY PROBIOTIC.
SCIENCE
BACKED
Formulated by PhDs in molecular-cellular and microbiology
40B CFU
PER DOSE
2-in-1 blend with strains for microplastic binding and others for general health
100% NATURAL,
LIGHT LABS TESTED
All FDA safe ingredients & allergen-free
FREE IF YOU
DON'T LOVE IT
If you don't love your first month of Winnow, it's on us (seriously)
SHOP NOW
In The News:
"A simple way to protect the one body you've got and live a life plastic-free."
"Using science to protect what you've built is plain smart, because your body is your most excellent tool."
"There is mounting evidence that microplastics are infiltrating human bodies and endangering people’s health."
FAQs
Have any more questions? Let us know!
What is Winnow and how does it work?
Winnow is a 2-pill per day probiotic supplement with a patent-pending probiotic blend shown to bind microplastics in the laboratory. Winnow’s microplastic binding probiotics are complemented with additional probiotics that support a balanced gut microbiome, helping reinforce digestive health and resilience in the face of modern environmental exposures.
Is Winnow the same as my current daily probiotic?
No… and yes. Winnow contains a high CFU (colony forming units) dosage of the most researched, tested, and proven probiotic strains on the market which support overall digestive health. And, Winnow does something no other probiotic does. It includes a proprietary, patent-pending blend of probiotics selected for their unique abilities to bind microplastics in gut-simulated lab tests.
Can Winnow remove microplastics from your body?
Winnow is not designed to remove plastics that have already moved into the bloodstream, tissues, or organs.
Winnow works in the gut. Its mechanism is simple. Certain probiotics can bind to micro and nanoplastics. In our lab testing, these strains capture plastic particles in simulated gut conditions. You can find more detail on our science page.
Winnow is not a detox and not a cure. It supports gut function by helping carry bound microplastics forward as the probiotics pass through the digestive system.
This is our first step toward our mission: gut armor for the modern world.
Is Winnow safe?
Absolutely. Every probiotic strain in Winnow is Generally Recognized as Safe (GRAS) for human use and has a long history of safe consumption. Winnow is formulated for adults ages 18 and older. If you have any questions or specific health concerns, please consult your physician before use.
Is Winnow safe for pregnancy or breastfeeding?
Winnow is made with familiar, food-grade probiotic species that are widely used in fermented foods and in many prenatal probiotic formulas.
Every pregnancy and health situation is unique. If you are pregnant, breastfeeding, or trying to conceive, we recommend checking with your healthcare provider before starting any new supplement, including Winnow.
How is Winnow formulated?
Our team of experts, PhDs, and advisors have decades of collective experience in microbiological engineering, gut health, and microplastics expertise to help create the most effective probiotic supplement available today.
What kind of fiber blend does Winnow use, and why?
Winnow uses a simple blend of organic rice fiber and raw potato starch. The rice fiber supports natural movement through the gut, while the raw potato starch provides resistant starch, a prebiotic that nourishes beneficial microbes and reinforces the gut’s natural barrier.
Does Winnow contain plastic?
No! Winnow is plastic-free from the capsule to the package.
Should I be concerned about microplastics in my body?
Loaded question. Microplastics awareness and research is still relatively new and evolving quickly. No one knows definitively the health risks they pose. But, where there’s smoke, there’s often fire. Microplastics contain BPA, PFAS and other harmful “forever” chemicals. Studies suggest potential respiratory, digestive, reproductive, cardiovascular, immune system, and brain health related risks.
Which microplastics does Winnow target?
We’ve demonstrated binding by Winnow probiotics to five different plastic types: polyethylene terepthalate (PET; commonly found in water bottles and food packaging), polyethylene (PE; plastic bags, films, and containers), polypropylene (PP; food containers, straws, and bottle caps), polyvinyl chloride (PVC; pipes, flooring, medical supplies), and polystyrene (PS; foam cups, packaging, disposable cutlery).
What are your pouches made of?
We use 100% compostable stand-up pouches made by Elevate Packaging.
Each pouch is crafted from kraft paper and certified compostable bio-based films — never petroleum plastic. They’re BPA-free, phthalate-free, non-GMO, and vegan, designed to fully break down in composting environments.
The material meets ASTM D6400 and EN13432 compostability standards and is safe for home composting (results may vary by compost system). Every component — the paper, the lining, and the zipper — is individually certified compostable.
Do you ship to Canada?
Canada allows personal import of a single course of treatment or up to a 90-day supply, whichever is less. Products must arrive in their original retail packaging with the full label intact, which all Winnow shipments include.
Orders are for personal use only and not for commercial resale.
Please limit your order to a 90-day supply per person per shipment.
Duties and taxes may apply upon delivery.