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Your Dishwasher Tablets Could Be Damaging Your Gut — Here’s Why
Scientists advise that popular UK dishwasher tablets can damage lead to 'leaky gut'.
BY GABRIELA SMITH
UPDATED: 5th OCT 2025
TESTED BY SARAH DAVIS
PRODUCT TESTING MANAGER
HOME & HEALTH UK
Quick Summary
Scientists tested popular dishwasher products on gut cell models.
The rinse-aid chemical in some tablets damaged gut cells — even at 1:20,000 strength (one drop of detergent per litre).
These same chemicals are used by many UK brands to make dishes “shine.”
Traces can stay on plates after washing, especially in fast commercial machines.
Long-term effects on people aren’t known yet — more testing needed.
The good news? There are safer, non-toxic options that still clean well.
Study Overview
A new study tested whether dishwasher tablets leave residue on plates (and what happens if we ingest it).
Researchers tested tablets and rinse aids on human gut cells.
The results were worrying.
The biggest culprit wasn’t the detergent itself.
It was a type of chemical used in many tablets and rinse aids called alcohol ethoxylates.
Even tiny traces (about one drop in a litre of water) were enough to make gut cells leak and break down in the lab.
Why it matters: the long-term effects of alcohol ethoxylates in human trials is still unknown.
In other words: your dishwasher tablets could be messing with your gut health.
What’s Really on Your Plates?
When your dishes come out sparkling, here’s what might still be clinging to them:
Alcohol Ethoxylates
Used in “all-in-one” tablets for that glossy finish. They’re the same surfactants found to damage gut cells in the study.
Phthalates
Often hidden in fragrance blends.
These can mimic hormones and mess with fertility and hormone balance.
Benzotriazole
A metal-protecting chemical found in many top UK brands. Experts class it as a suspected hormone disruptor.
1,4-Dioxane
An industrial by-product and probable human carcinogen.
It’s not added on purpose, but often sneaks in during manufacturing.
So while your dishes look spotless… they might not be harmless.
What It Can Do to Your Body
When those chemicals build up, your body can start to push back.
Leaky Gut
Alcohol ethoxylates can make gut walls “leakier,” letting toxins slip into your bloodstream.
Digestive issues
You might notice bloating, stomach pain, or food sensitivities.
Inflammation
Your immune system stays switched on, causing fatigue and joint aches.
Hormone disruption
Phthalates can affect estrogen and testosterone balance (linked to fertility issues, mood swings and more).
Weight gain & low energy
Endocrine disruptors can slow metabolism and alter appetite.
Higher cancer risk
Compounds like 1,4-dioxane are tied to DNA damage and some cancers.
It’s a slow drip effect: small doses, every day, for decades.
How to Check Your Own Tablets
Here’s the bad news:
If your dishwasher tablets say “All-in-One” or boast a “mirror shine,” they probably use alcohol ethoxylates.
The good news?
They’re often listed right on the back of the pack.
Look for these words: “Alcohol ethoxylates”
If They’re That Toxic, Why Are They Still Sold?
Simple: most safety tests look at short-term exposure, not years of tiny daily doses.
And the study focused on commercial dishwashers, which have very short rinse cycles meaning more residue left behind.
Home dishwashers rinse longer, so the risk is lower, but not zero.
Scientists are calling for more testing to find out what decades of exposure really does to our gut health.
Until then, many people are choosing to avoid alcohol ethoxylates altogether.
Do You Actually Need Them?
Not anymore.
Big brands keep using these chemicals because they’re cheap, not because they’re better for our health.
Newer formulas use plant-based, non-toxic ingredients that break down grease and food without hurting your gut.
Scroll down to see the Top 5 non-toxic dishwasher products that still leave dishes spotless.
The Top 5 Non-Toxic Dishwasher Tablets That Actually Work
Best Overall Dishwasher Tablet
Dip Dishwasher Sheets
Shop on Website
Update: Dip are currently running a 55% OFF Spring Sale!
Score: 95/100
After putting 15 non-toxic dishwasher tablets through rigorous testing, Dip came out on top as the best overall choice.
We tested it on some of the toughest kitchen messes—baked-on cheese, dried tomato sauce, tea and coffee stains...
And it consistently delivered the best cleaning power across the board.
Even on cloudy glassware and greasy pans, Dip left everything looking spotless.
And the scent? Fresh lemon.
Subtle, clean, and uplifting—without the heavy, artificial fragrance most tablets come with.
What truly sets Dip apart is that it’s trusted by leading health experts.
People like:
Liberty Mills (women’s health and hormone expert)
Tim Gray (the UK’s top biohacker),
Sophie Bertrand (nutritionist)
These professionals all recommend Dip for households looking to reduce toxic load without sacrificing performance.
On the sustainability front, Dip goes further than most.
While many other options are plastic-free, Dip’s packaging is home compostable, FSC-certified, and 100% recyclable.
Its formula is also certified biodegradable by the OECD, meaning it breaks down quickly and safely in our waterways—protecting both people and planet.
And because it’s up to 90% lighter than traditional dishwasher tablet formats, it requires significantly less CO2 to ship.
That means it’s not just cleaner for your home—it’s cleaner for the planet too.
Pros
No Alcohol Ethoxylates (Gut Disruptors)
No Hormone Disruptors (ECHA Compliant)
Only use plant-derived or lower impact ingredients
Best results at removing tough stains
2-in-1: Detergent and Pre-Soak
Totally transparent with ingredients
Delightful, Light Fragrance
Lightweight (Less Delivery Emissions)
Certified Biodegradable (OECD)
Plastic Free Packaging (FSC Certified)
Carbon-Neutral Delivery
Vegan & Cruelty free
No Carcinogens
100% Money Back Guarantee
Cons
Only available on their website.
A bit more expensive per wash (£0.02 more)
Need to keep your rinse aid and salts topped up for optimal performance
Shop #1 Pick
Why These Sheets Were Our Favourite
One of the biggest reasons Dip stood out above the rest was the fact that it’s a dishwasher sheet—something none of the other products we tested offered.
This innovative sheet format gave it several unique advantages, making it the most practical, health-conscious, and environmentally friendly option on our list.
First, Dip is the only dishwasher tablet with a true 2-in-1 formula—acting as both a detergent and a pre-soak.
This made it especially effective when handwashing dishes or soaking burnt-on trays.
To use in the dishwasher, simply fold the sheet into quarters and pop it in the tray.
No bulky pods, no powder mess.
Where Dip really impressed us was its health-first approach.
It’s been trusted by wellness experts like nutritionist and hormone expert—so you know it’s built on more than just marketing.
It’s also one of the cleanest formulations we tested:
No alcohol ethoxylates (linked to gut barrier damage)
No carcinogens like DEA or 1,4-dioxane
No hormone-disrupting fragrances
And full transparency around all ingredients—including the fragrance.
Dip is also one of the only brands with an OECD-certified biodegradable formula, meaning it breaks down safely in water and won’t pollute our rivers, lakes, or oceans.
Its FSC-certified cardboard packaging is not only 100% plastic-free—it’s also home compostable and recyclable.
And because the sheets are so light and compact, they use up to 90% less CO2 during delivery compared to traditional tablets or liquids.
In terms of overall sustainability, Dip set a new standard.
And while it’s slightly more premium than conventional tablets, Dip offers flexible subscription options that make it even more affordable per wash—plus the added convenience of never running out.
For all these reasons—performance, health, and sustainability—Dip was our clear #1 pick.
Key Specifications
Format
Sheets
Number of Washes
60
Price Per Wash
£0.28
All-In-One
No
Fragrance Options
Fresh Lemon
Subscription Options
Yes (20% OFF)
Reasons To Buy
2-in-1 formula, best cleaning performance, clean ingredients, most eco-friendly, trusted by experts
Score: 85/100
Bower Collective is a well-known name in the eco-cleaning space, so we were curious to see how their dishwasher tablets would perform in our tests.
The lemon scent was light and natural—pleasant without being overpowering, and a nice change from the overly perfumed options on the market.
In terms of cleaning power, these tablets did a solid job in soft water conditions, removing general food residue and light grease effectively.
However, in tougher conditions—like baked-on dishes or when testing in a hard water setting—we noticed a decline in performance.
One of the biggest selling points of Bower Collective is its eco-friendly ethos.
The tablets come in plastic-free packaging and are wrapped in a biodegradable film, which we really liked.
The bulk format is also a plus—it’s cost-effective and reduces unnecessary deliveries.
That said, the box itself is on the larger side, and storage could be an issue for smaller kitchens.
While the minimalist design looks great, we found it slightly awkward to open and reseal once in use.
Overall, these tablets are a great low-tox option, especially if you live in a soft water area or already use separate rinse aid and salt.
Pros
Light, pleasant lemon scent (not overpowering)
Plastic-free, biodegradable packaging
Biodegradable water-soluble tablet wrapping
Bulk format reduces delivery frequency and packaging waste
Works well in soft water conditions
Cons
Lacks built-in rinse aid and salt (not ideal for hard water areas)
Bulky packaging can be difficult to store in small kitchens
Key Specifications
Format
Tablets
Number of Washes
72
Price Per Wash
£0.29
All-In-One
No
Fragrance Options
Lemon
Subscription Options
Yes
Reasons To Buy
Plastic free packaging, pleasant scent and good cleaning power
Score: 80/100
Homethings has gained attention in the eco-friendly cleaning market, so we were eager to test their dishwasher tablets.
The slim, letterbox-friendly packaging is a thoughtful touch, especially for those who may not be home for deliveries.
In our London-based tests, where the water is moderately hard, the tablets effectively cleaned dishes, removing common food residues and leaving glassware clear.
However, during trials in Suffolk, an area known for very hard water, the tablets' performance declined, with some items requiring additional washing.
We appreciate that Homethings' tablets are vegan, cruelty-free, and free from phosphates and chlorine, aligning with their commitment to environmentally friendly products.
The packaging is plastic-free, reinforcing their eco-conscious approach.
Overall, Homethings' dishwasher tablets are a solid choice for those in areas with softer water.
However, in regions with very hard water, additional measures like using separate rinse aids or water softeners may be necessary to achieve optimal results.
Pros
Slim, letterbox-friendly packaging (great for easy delivery)
Plastic-free and eco-conscious design
Vegan, cruelty-free, and free from phosphates and chlorine
Effective in moderate to soft water areas
Cons
Struggles in very hard water areas without added rinse aid
Slightly less effective on heavily baked-on residues compared to top performers
Key Specifications
Format
Tablets
Number of Washes
40
Price Per Wash
£0.25
All-In-One
No
Fragrance Options
Eucalyptus
Subscription Options
Yes
Reasons To Buy
Letterbox-friendly packaging, eco-formula and decent cleaning power
Score: 75/100
OceanSaver is a well-known name in plastic-free cleaning, and their dishwasher tablets are one of the more affordable options we tested—especially when bought in bulk.
Cleaning performance was solid across the board.
The tablets handled grease, dried-on food, and even performed well in harder water areas.
There’s no strong scent, but dishes came out smelling fresh and free from chemical odours.
The tablets include built-in salt and rinse aid, which makes them super convenient.
However, it's worth noting that they’re the least low-toxic option on this list.
The formula includes some bleaching agents, which help boost cleaning power, but aren’t as gentle or health-conscious as the other products we tested.
Still, for those looking for a budget-friendly, plastic-free tablet that gets the job done, OceanSaver offers great value.
Just know it may not be the best fit for those with more sensitive health or ingredient concerns.
Pros
Very affordable (especially when bought in bulk)
Strong cleaning performance, even in hard water
Built-in salt and rinse aid for convenience
Plastic-free, compact packaging
Cons
Least low-toxic option on this list
Contains bleaching agents
Not ideal for those with sensitivities or seeking the cleanest ingredient profile
Key Specifications
Format
Tablets
Number of Washes
30
Price Per Wash
£0.28
All-In-One
Yes
Fragrance Options
Not stated but fragrance is listed as an ingredient
Subscription Options
Yes
Reasons To Buy
Great value, good cleaning performance and plastic free
Score: 70/100
Smol’s dishwasher tablets offer good cleaning performance, and their direct-to-door subscription model is a big part of their appeal.
We found them highly effective at tackling grease, baked-on food, and tough stains—delivering reliably clean results in both soft and hard water areas.
The tablets also come with a free trial, which is a great way to test them before committing.
That said, Smol is subscription-only, and while their system is easy to manage (you can pause, cancel, or reschedule with a few clicks), it does make the product less accessible for those who prefer to shop in stores or on their own terms.
This lack of flexibility is the main reason Smol didn’t place higher in our ranking.
Packaging is plastic-free and compact, aligning with their low-waste ethos, and the tablets are vegan and cruelty-free.
Ingredient transparency is decent, though not as comprehensive as some of the other brands we tested.
Overall, Smol is a solid choice if you're comfortable with a subscription-only setup.
But for those who prefer a more flexible purchase option, there are alternatives that offer the same performance without the restrictions.
Pros
Good cleaning performance on grease and tough stains
Plastic-free, compact packaging
Vegan and cruelty-free
Cons
Contains Phosphonates (not great for the environment)
Only available on subscription—no one-off purchases
Ingredient transparency not as detailed as top picks
Key Specifications
Format
Tablets
Number of Washes
30
Price Per Wash
£0.22
All-In-One
Yes
Fragrance Options
Not stated but fragrance is listed as an ingredient
Subscription Options
Only Subsciption
Reasons To Buy
Good cleaning performance, plastic free and vegan and cruelty free
Conclusion
Here’s the bottom line:
Dishwasher tablets might look harmless, but some contain chemicals that scientists now know can harm gut cells (even in tiny amounts).
We don’t yet know what decades of exposure will mean for our health.
But we do know one thing: you don’t need these ingredients for a clean wash.
After comparing 15 “eco” and mainstream brands, we ranked the top 5.
Dip Dishwasher Sheets came out on top.
They clean just as powerfully, skip the alcohol ethoxylates, and come in plastic-free packaging.
No mess. No hidden toxins.
Just peace of mind and sparkling dishes.
If you’re ready to try them, they have a £29.99 full home cleaning bundle.
Includes the Dishwasher Sheets as well as Laundry Sheets and Multi-Purpose Cleaning Spray (all non-toxic).
Shop Our Favourite Non-Toxic Brand
Update: Dip are currently running a 55% OFF Spring Sale!
Disclaimer: This is an advertorial, while we believe the information provided is accurate to the best of our knowledge, it is not an actual news article, blog, or consumer protection report.