A DAILY PROBIOTIC FOR THE PLASTIC AGE
Better gut health is just the start.
One capsule, two jobs. Gut health you can feel, with plastic-binding science built in.
Light Labs verified
ISO-17025 accredited
200+ contaminants
tested per batch
0 plastic
packaging & product
30-day guarantee
love it or it's free
THE REALITY
Microplastic exposure is a part of everyday life.
Peer-reviewed studies are finding microplastics where they shouldn’t be – our bodies – and evidence of issues related to them is growing year by year.
See my full estimate -
BLOOD & ARTERIES
77
%
of healthy adult blood donors.
PLAQUES
58
%
of arterial plaques.
REPRODUCTIVE
100
%
of placentas from growth-restricted pregnancies.
BRAIN
+
200
%
higher levels in dementia vs. normal samples.
You can't avoid them entirely. But the gut is the body's largest interface with the environment — and the place where intervention may be most actionable.
A GREAT PROBIOTIC, UPGRADED
Two layers of purpose.
Winnow delivers the daily gut support you expect from a probiotic, with a plastic-binding breakthrough built into each serving.
Use the slider to see how probiotic strains differ in their plastic-binding ability. Left, a strain that barely interacts with nanoplastics. Right, a strain with strong binding ability. Probiotics shown in purple, nanoplastics in blue. Teng et al. 2025 →
LAYER 01
CLINICALLY-STUDIED GUT SUPPORT
Winnow combines three extensively studied probiotic strains, backed by more than 2,300 scientific publications and 300 clinical trials.
LAYER 02
SCIENCE-BACKED PLASTIC BINDING
Winnow’s probiotic consortium was formulated for synergy, delivering nearly double the plastic-binding performance of any single strain tested.
Read the full science →
Use the slider to see how probiotic strains differ in their plastic-binding ability. On the left, a strain that barely interacts with nanoplastics. On the right, a strain with strong binding ability. Probiotics shown in purple, nanoplastics in blue. Teng et al. 2025 →
Winnow Daily Probiotic
Your subscription includes:
Free US shipping.
Free Starter Kit including reusable glass bottle.
Love your first month or it's on us, seriously. Just let us know in the first 30 days.
No commitments. Modify plan anytime.
Why Winnow
Winnow is the only daily probiotic built for gut health + the environmental contaminants we’re exposed to daily.
40B CFU/Dose
100% plastic free product + packaging
3rd party tested by LightLabs for 200+ contaminants & allergens
How to use
Take two capsules daily.
Take both at once or split them throughout the day. Take with a meal, or about 30 minutes before eating.
Choose the routine that feels best for your body and helps you stay consistent.
ALREADY TAKING A PROBIOTIC?
This is the upgrade.
Most probiotics stop at gut support. Winnow starts there — then goes after the microplastics typical probiotics weren't built to handle.
See how Winnow compares →
Daily gut support
Plastic binding
Acid resistant capsule
Suitability for daily use
Contaminant testing
Plastic-free product & packaging
Winnow
Yes
Yes
Yes
Yes
Free of 200+ impurities
Yes
Standard Probiotics
Yes
No
Varies
Yes
Varies
Rare
Chitosan Binders
No
Yes
No
Dependent, allergen
Varies
Rare
Charcoal / Zeolite
No
No
No
Caution needed
Varies
Rare
REVIEWS
What customers are saying.
"Been taking for a few months now and really pleased with this probiotic! I have IBS and finding a probiotic that doesn’t upset my stomach has been a challenge in the past. Since taking it my digestion has been very regular and I have way less bloating. I also love the sustainability aspect with shipping."
Abby
Verified Buyer
"We’ve been using “Winnow” for a few weeks now and have already started to noticed changes. First, less bloated. Secondly, I noticed my hair getting stronger along with my nails. I can feel an “overall” improvement in my body. I’m anxious to see how it continues."
Bob
Verified Buyer
"I had to take strong antibiotics as a teenager due to a severe case of pneumonia, and ever since, my digestion has never quite been the same. For years, I’ve struggled with irregular and difficult bowel habits. I tried a handful of different probiotic brands, but nothing ever made a noticeable difference. I’m two months into using Winnow, and it’s the first product that has genuinely helped."
Ally
Verified Buyer
GO DEEPER
From the Winnow Journal.