Green Cleaning Guides

How to Read a Cleaning Label: 5 "Natural" Sounding Ingredients to Actually Avoid

Written by Kay Baker, MS, OTR/L — CEO & Co-Founder • Reviewed by Matthew Keasey, Ph.D. — Chief Science Officer • Last reviewed: November 24, 2025

Transparency note: This article cites government sites, standards bodies, and peer-reviewed sources wherever possible. Educational only, not medical or legal advice.

You’re standing in the cleaning aisle. In your hands are two bottles, both promising a "plant-powered," "natural" clean. One has a picture of a lemon on it. The other, a leafy green logo. They look great. They feel like the right choice.

Then you turn them around and look at the ingredient list. It’s a wall of unpronounceable, multi-syllabic words that make your eyes glaze over. You came here to buy a cleaning spray, not to get a Ph.D. in organic chemistry.

So you give up. You grab the one with the nicer-looking bottle and hope for the best.

We’ve all been there. But what if you could learn to spot the marketing fluff in five seconds flat?

How to Read Cleaning Labels and Beat the Hype

How to read cleaning labels is a skill that empowers you to see past the pretty pictures and understand what’s really in the bottle. The secret isn’t memorizing every chemical name. It’s learning to spot the common marketing tricks, the ingredients that sound wholesome but are anything but.

Here are five red flags to watch for: 

1. The Word: "Fragrance" or "Parfum"

If you learn nothing else, learn this. "Fragrance" is not an ingredient. It’s a loophole.

Because of "trade secret" laws, companies are not required to disclose the individual chemicals that make up their signature scent. That single word can be a catch-all term for a cocktail of hundreds of different chemicals, including phthalates, which are known endocrine disruptors. When you see "fragrance," you're looking at a black box of uncertainty. A truly transparent company will either use no scent at all or list the specific essential oils they use.

2. The "Good" Natural Scents: Limonene & Linalool

Okay, so you spot a brand that does list its fragrance ingredients. You see "limonene" and think, "Great, that comes from lemons!" And you’re right, it does. But here’s the nuance: limonene and linalool (from lavender) are also two of the most common contact allergens found in cleaning products. For people with sensitive skin, asthma, or allergies, these "natural" ingredients can be highly irritating. A company dedicated to safety will often offer a truly fragrance-free version for this very reason.

3. The Misdirection: "Coconut-Based Cleaner"

This one sounds fantastic. Coconuts are natural! What could be wrong? The problem is that this vague term can be used to hide harsh surfactants. For example, Sodium Lauryl Sulfate (SLS), a chemical known to irritate skin, can be produced using coconut oil. A company can then call it a "coconut-based cleaner" on the front of the bottle. It's not untrue, but it's misleading. Look for brands that name the specific gentle surfactants they use, like Decyl Glucoside or Coco Glucoside.

4. The Hidden Preservative: Methylisothiazolinone (and friends)

You’ll see this one in products marketed as "gentle" or even in some baby wipes. Methylisothiazolinone is a preservative used to prevent bacteria and mold from growing in water-based products. Unfortunately, it's also a well-known neurotoxin and one of the most common causes of allergic contact dermatitis. It’s a harsh chemical often hiding in a "natural" product’s clothing.

5. The Illusionist: Optical Brighteners

This is a sneaky one, found mostly in laundry detergents. Optical brighteners don't actually get your clothes any cleaner. They are chemicals designed to absorb ultraviolet light and re-emit it as blue light, creating an optical illusion that makes whites appear whiter and colors seem brighter. It’s a visual trick, and the chemicals are designed to be left behind on your clothes, which can lead to skin irritation.

The Antidote: Demand Transparency

You don't need a chemistry degree to make a better choice. You just need to look for brands that do the work for you. A truly conscious company will prove its safety and effectiveness through transparency and verification. It's the entire philosophy behind our guide on how to spot greenwashing.

Look for simple shortcuts to trust, like a clear list of ingredients you can actually pronounce and certifications from third-party experts. Understanding these seals is your best defense, which we break down in our full guide: What Do Eco-Friendly Certifications Actually Mean?.

Ultimately, reading a label isn't just about avoiding a few bad ingredients. It's about choosing brands that respect you enough to tell you the truth. It's the first and most powerful step in your journey as a conscious consumer

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