You're standing in the laundry aisle, and every box screams "natural laundry detergent," "plant-based," or "eco-friendly."
But what does that actually mean?
Here's the thing: there's no federal definition of "natural" for plant-based detergent. None. And that's exactly why you need to know what to look for.
A truly natural laundry detergent uses surfactants, enzymes, and builders derived from plant and mineral sources rather than synthetic petrochemicals, without artificial fragrances, dyes, or harmful preservatives. It prioritizes biodegradability, skin safety, and environmental responsibility while effectively cleaning your clothes.
The term "natural" gets thrown around like confetti in the cleaning aisle, but without clear rules, it's easy for brands to make claims that don't hold up. The good news? You can learn what actually matters, which ingredients genuinely make a difference, and how to spot the difference between honest products and greenwashing.
Let's break it down.
The Problem With 'Natural' on Laundry Labels
Imagine if anyone could call their product "natural" without any real definition or oversight. That's basically where we are with laundry detergent.
There is no federal FTC definition of 'natural' for laundry detergent. The FTC Green Guides (16 CFR Part 260), last revised in 2012, explicitly declined to define what 'natural,' 'sustainable,' or 'organic' actually mean. (Source: FTC Green Guides, https://www.ftc.gov/news-events/topics/truth-advertising/green-guides)
Why does that matter?
Because brands can technically label almost anything as "natural" and the only consequence is if they get caught making false claims. The FTC has been promising to update these guidelines for years—updates were expected in 2023, then 2024, then 2025, and as of late 2025 they're still pending.
The result?
More than 45% of new laundry detergent launches in 2023-2024 were labeled 'green,' 'plant-based,' or 'sustainable,' according to market research. That's a lot of green-labeled products hitting shelves, and not all of them deserve the label.
This is why reading beyond the buzzwords is essential. The label is only half the story.
What Ingredients Actually Make a Detergent 'Natural'?
When brands talk about "natural laundry detergent," they're usually referring to specific ingredients: surfactants, enzymes, and other cleaning agents derived from plants rather than fossil fuels. Here's what to look for.
Surfactants
Surfactants do the actual cleaning. They're the molecules that grab onto dirt and oil so water can wash them away. The question is where they come from.
Conventional detergents typically use surfactants made from petroleum. Natural detergents swap those out for plant-derived alternatives — things like coconut oil, corn starch, or vegetable oils. You might see ingredients like coco-betaines, alkyl polyglycosides (APG), or saponified coconut oil on the label. If the name sounds like a plant, that's generally a good sign.
Why does this matter?
About 60% of the 15 million tonnes of surfactants produced globally each year end up in waterways. Plant-based surfactants break down faster and do less damage to aquatic ecosystems. One peer-reviewed study found that switching just one tonne of conventional surfactant to a plant-based alternative cuts CO₂ emissions by 1.5 tonnes(!).
Enzymes
Enzymes are the stain specialists. Proteases handle protein stains (blood, sweat), lipases tackle grease, and amylases break down starches (food, grass). The best natural formulas use all three. One nice bonus: enzymes work well at lower temperatures, so they're a natural fit for cold-water washing.
Builders
Builders soften your water so the surfactants can do their job. Natural options include sodium citrate and sodium carbonate. Conventional detergents often use EDTA or phosphates, which stick around in waterways longer than you'd want.
What About the Ingredient List?
A good rule of thumb: if you can't recognize at least 70% of what's on the label, keep looking. A truly natural detergent has a short, readable ingredient list — not one that reads like a chemistry final. For more on what to avoid, check out our guide on non-toxic laundry detergent benefits.
One thing to watch: "plant-based" usually means most of the active ingredients come from plants. But "most" isn't "all" — and no law requires brands to be specific about that ratio.
Red-Flag Ingredients to Avoid
Not all ingredients are created equal. Here's what to watch out for:
Phosphates and EDTA
These water-softening agents can contribute to nutrient pollution in waterways. They're less common in U.S. detergents than they used to be, but they still show up. Look for "EDTA-free" on labels.
Sulfates and Parabens
Sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES) are harsh, though not toxic. Parabens are preservatives with mixed safety data. Many natural brands skip them, but they're not inherently "bad." If you want to avoid these entirely, look for fragrance-free laundry detergent options that use gentler formulations.
Synthetic Fragrances and Dyes
The term "fragrance" on a label can hide dozens of chemical ingredients—some of which may trigger allergies or sensitivities. For a truly minimal product, look for fragrance-free laundry detergent options or products that list specific essential oils.
Triclosan and Antimicrobial Agents
These don't belong in laundry detergent and have been banned in many personal care products. Check that your detergent doesn't sneak them in. Understanding whether laundry detergent is toxic helps you make informed choices about your family's health.
Optical Brighteners
Also known as fluorescent whitening agents, these don't clean—they make clothes look whiter by reflecting light. They don't break down easily and can accumulate in water systems. This is where understanding the difference between "clean" and "cosmetically enhanced" matters.
Greenwashing often relies on vague language and partial truths. If something sounds too good to be true, compare it to the ingredient list. More on spotting greenwashing in our dedicated guide about what is greenwashing.
Certifications That Actually Mean Something
If the ingredient list is the "what," certifications are the "proof."
Not all certifications are equally rigorous. Here's which ones carry real weight:
EPA Safer Choice
The Environmental Protection Agency reviews the product's ingredients and manufacturing process. This is one of the strictest certifications for cleaning products. If a detergent has this label, the ingredients have been vetted for genuinely natural and non-toxic properties.
The EPA's review goes beyond just listing ingredients—it evaluates aquatic toxicity, human health concerns, and biodegradability. Products earning this label must meet EPA standards across all these metrics, which is why EPA Safer Choice certification is considered the gold standard for natural laundry detergent safety.
Green Seal
Third-party certification that evaluates ingredients, manufacturing, and packaging. Green Seal standards are strict—products must meet specific performance benchmarks while minimizing environmental impact. This certification verifies that detergents marketed as natural are substantiated.
Green Seal certification requires that formulations perform effectively in consumer-relevant wash conditions (matching real-world laundry challenges), which distinguishes it from certifications that only evaluate ingredient sourcing. The organization also assesses packaging materials and manufacturing waste, making it a comprehensive environmental certification.
USDA Biobased
Certifies that a product contains a certain percentage of ingredients derived from renewable resources. Look for the percentage—it matters. 90% biobased is very different from 20% biobased.
The USDA label typically shows the biobased content percentage on the product, and products with higher percentages generally have lower environmental footprints since they rely less on fossil fuel-derived ingredients.
USDA Biobased certification also verifies through third-party testing that the percentage claims are accurate, preventing brands from inflating their natural credentials.
Rainforest Alliance and Fair Trade
These don't specifically certify "natural," but they ensure ingredients are sourced responsibly. This is especially important for products using palm oil or other commodity ingredients. Learning more about green cleaning products helps you identify brands with genuine sustainability practices.
California State Law
California Business & Professions Code § 17580.5 makes it unlawful to make false environmental marketing claims, incorporating FTC Green Guides into state law. (Source: California BPC / Provenance.org, https://www.provenance.org/news-insights/what-are-the-ftc-green-guides-and-what-do-they-mean-for-brands) This means brands operating in California face real consequences for greenwashing.
Certifications aren't perfect, but they represent accountability. A product with multiple third-party certifications has jumped through more hoops than one with just marketing claims.
State-Level Enforcement: Why It Matters
Here's the reality: federal standards for "natural" laundry detergent are still pending (and have been for years). But states are filling the gap.
California's strict environmental marketing laws set a precedent that other states are beginning to follow. When a brand makes an environmental claim—"100% biodegradable," "eco-friendly," "non-toxic"—it can face legal action if those claims are false. This creates real incentive for honesty.
Think of state-level enforcement as a temporary guardrail while we wait for federal updates. It's not perfect, but it's something. And if you're buying from a brand that operates nationally, odds are they're already held to California standards whether you live there or not.
How to Read a Laundry Detergent Label
Now let's put this into practice.
Start With the Ingredient List
It should be readable. If you don't recognize at least 70% of the ingredients, ask yourself why. A product that lists "surfactants (coconut-derived)," "enzymes," and "essential oils" is giving you transparency. One that just says "proprietary cleaning blend" is not.
For example, HeySunday publishes the full ingredient list for every product. Here's what's in our laundry sheets:
Fragrance Free
Sodium Dodecyl Sulphate, Polyvinyl Alcohol, Starch (Corn), Deionized Water, Cocamidopropyl Betanine, Lauramidopropylamine Oxide, Sodium Fatty Acids, Glucoside Polyoxyethylene Ether, Natural Saponin, Sunflower Oil, Tea Oil, Protease, Citric Acid, Glycerin.
Ocean Breeze
Sodium Dodecyl Sulphate, Polyvinyl Alcohol, Starch (Corn), Deionized Water, Cocamidopropyl Betanine, Lauramidopropylamine Oxide, Sodium Fatty Acids, Glucoside Polyoxyethylene Ether, Natural Saponin, Sunflower Oil, Tea Oil, Protease, Citric Acid, Glycerin, Fragrance.
Short list, recognizable ingredients, no "proprietary blend" — that's what ingredient transparency looks like.
Look for Certifications
EPA Safer Choice, Green Seal, and USDA Biobased labels indicate third-party accountability. These aren't perfect, but they mean someone vetted the product and verified it meets rigorous standards for a truly natural formula.
Check for Specific Plant-Based Claims
"Plant-based surfactants" is more meaningful than "natural." "No synthetic fragrances" is clearer than "freshly scented."
Performance Claims vs. Environmental Claims
A detergent can claim to get your clothes clean (performance) without being "natural" or "eco-friendly." These are separate conversations. A truly natural laundry detergent should do both—clean well AND minimize environmental impact.
Consider Your Water
If you have hard water, you'll want builders in your detergent. If you're on a septic system, you want biodegradable options. Your circumstances shape what "natural" actually means for your home. Learn more about septic-safe laundry detergent.
Be Skeptical of Excessive Marketing
If the front of the box takes up three times more space than the ingredient list, that's a sign the brand is banking on vibes rather than substance.
Many eco-friendly detergents come in concentrated forms—laundry sheets, for instance, eliminate water weight and packaging bloat. They're easier to store, require less shipping (lower carbon footprint), and you can see exactly what you're getting. When evaluating plant-derived cleaning products, concentrate-based options are worth your attention, especially for cold water laundry where they dissolve easily.
Frequently Asked Questions
Is "natural" laundry detergent actually better?
Not necessarily—it depends on what matters to you. A truly natural laundry detergent can be gentler on skin, better for aquatic ecosystems, and made without harsh chemicals. But conventional detergents can also clean effectively. The key is making a choice based on facts, not buzzwords.
Does natural detergent clean as well as conventional?
Yes, if it's formulated properly. Plant-based surfactants and enzymes are just as effective as synthetic ones when used correctly. The difference is environmental impact and skin sensitivity, not cleaning power.
What's the difference between "natural laundry soap" and "plant-based detergent"?
Natural laundry soap is technically made through saponification (combining fats with lye), while natural laundry detergent is synthesized from plant-based materials. Both can be gentle and eco-friendly, but they differ in how they're made. Some prefer natural laundry soap for its simplicity and minimal ingredient lists.
Why isn't "natural" legally defined?
Because it's genuinely complicated. What counts as natural? Is a synthetic enzyme derived from microorganisms more natural than a chemical synthesized in a lab? The FTC decided the category was too murky to define—which inadvertently left the door open for greenwashing. Expect updated guidance eventually, but don't hold your breath.
What's the difference between "natural" and "plant-based"?
"Plant-based" refers to ingredients sourced from plants rather than petroleum. "Natural" is vaguer and unregulated. A detergent can be plant-based but use harsh processing chemicals. The best products are both.
The Bottom Line
There's no perfect "natural laundry detergent"—there's only the one that's right for your values, your skin, and your home. The fact that "natural" has no federal definition means you have to do the work of reading labels and checking certifications.
But here's the upside: you're equipped now. You know what surfactants matter. You know which certifications to trust. You know that state-level enforcement exists and is tightening. Most importantly, you know that buzzwords aren't proof.
When you find a detergent that's transparent about its ingredients, backed by real certifications, and uses plant-based cleaning agents—that's when "these products" actually mean something.
