Is Mrs. Meyer's Actually Non-Toxic? A Straight Ingredient Check

You’ve got the bottle in your hand right now, or you’re standing in the aisle deciding whether to buy it. The label says “garden fresh,” the bottle looks like it belongs in a farmhouse kitchen, and somewhere in the back of your mind you’ve filed Mrs. Meyer’s under “one of the better ones.” So here’s the actual question: is it non-toxic? Straight answer, no hedging.

No. Not because it’s secretly dangerous — but because “non-toxic” isn’t a real category it could pass or fail. What matters is what’s actually in the bottle, and we’re going to show you.

The story behind why we checked

Elizabeth spent years reading supplement labels before she ever read a cleaning label — a decade in the wellness industry teaches you that “clean,” “natural,” and “gentle” are marketing words first and chemistry words a distant second, if at all. When she and Italo started building Ecolosophy, the first thing they did wasn’t design a bottle. It was pull the ingredient lists of every “safe-sounding” cleaner already sitting under their own sinks, Mrs. Meyer’s included, and read them the way a chemist would rather than the way a shopper does.

What they found wasn’t a scandal. It was a preservative most people have never heard of, sitting in plain sight on a label most people have never fully read.

The truth: what’s actually in the bottle

Start with the word itself. “Non-toxic” has no legal definition on a cleaning product in the United States. The FDA doesn’t define it. The EPA doesn’t define it. A brand can print it, imply it with leaf icons and pastel colors, or simply let you assume it — and face no regulatory consequence either way. That’s true of Mrs. Meyer’s, and it’s true of us. Nobody in this category gets to claim “non-toxic” as a verified fact, because there’s no test to verify it against.

So skip the marketing word and go to the formula. Mrs. Meyer’s publishes its ingredient lists on its own product pages, which is more than a lot of brands do, and we give them credit for that. Here’s what’s actually on them.

Methylisothiazolinone (MI). Mrs. Meyer’s Peony, Mint, and Lavender Multi-Surface Everyday Cleaners all list methylisothiazolinone and benzisothiazolinone as preservatives, right there in the brand’s own published ingredients (Peony, Lavender). MI is a workhorse preservative — it stops mold and bacteria from growing in water-based formulas, and it’s legal and common across the cleaning and personal care industry. It’s also the preservative the American Contact Dermatitis Society named its 2013 Allergen of the Year, after tracking a documented spike in allergic contact dermatitis tied to its wider use in leave-on and household products. A 2020 review in the Journal of the European Academy of Dermatology and Venereology describes it as a genuine “epidemic” of MI-related skin allergy that dermatologists were still tracking as recently as 2020. That doesn’t make it illegal or rare. It makes it a named, documented tradeoff — not something the word “non-toxic” would tell you about.

Undisclosed fragrance. Like nearly every scented cleaner on the market, Mrs. Meyer’s lists “Fragrance” as a single line item. Under FDA trade-secret rules, that one word can legally represent a mixture of dozens of compounds the company never has to name. The EPA’s own Safer Choice program says as much: it built an entire fragrance-free certification specifically because “many fragrance materials may be associated with sensitization and allergenic responses and lack toxicological data.” This isn’t a Mrs. Meyer’s problem specifically — it’s a category-wide loophole almost every scented brand uses, including ones that market themselves as green.

What isn’t in there. To be fair where fairness is due: Mrs. Meyer’s multi-surface cleaners don’t list phosphates or chlorine bleach, and the brand does publish real ingredient lists rather than hiding behind “proprietary blend.” If you want a third-party ingredient hazard score rather than taking our word or theirs, EWG’s Guide to Healthy Cleaning rates individual Mrs. Meyer’s products by name — worth five minutes if you want to check your exact bottle.

The micro-lesson

“Non-toxic” is a feeling a bottle is designed to give you, not a fact you can verify. The only real test is: can you name every ingredient in the bottle, and do you know what each one does? If a label makes that easy — full disclosure, no “fragrance” catch-all — that’s worth more than any word printed on the front. If it doesn’t, the leaf icon and the farmhouse font aren’t standing in for information. They’re standing in for the absence of it.

Where that leaves you

Nothing here means throw out your Mrs. Meyer’s tonight in a panic — millions of households use it daily without incident, and MI and fragrance are standard across the category, not a Mrs. Meyer’s-specific failure. What it means is you now know exactly what to check: does your bottle list methylisothiazolinone, and does your household include anyone with reactive or sensitive skin, asthma, or a fragrance sensitivity? That’s a real, answerable question — a lot more useful than “is it non-toxic.”

If you’d rather not keep checking bottle by bottle, take the free 2-minute Cabinet Audit — it walks through what’s actually under your sink and tells you plainly which of your current products are fine to keep and which are worth a second look, no guilt trip attached.